CVE-2024-26656 (GCVE-0-2024-26656)

Vulnerability from cvelistv5 – Published: 2024-04-02 06:08 – Updated: 2026-05-11 20:01
VLAI?
Title
drm/amdgpu: fix use-after-free bug
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix use-after-free bug The bug can be triggered by sending a single amdgpu_gem_userptr_ioctl to the AMDGPU DRM driver on any ASICs with an invalid address and size. The bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>. For example the following code: static void Syzkaller1(int fd) { struct drm_amdgpu_gem_userptr arg; int ret; arg.addr = 0xffffffffffff0000; arg.size = 0x80000000; /*2 Gb*/ arg.flags = 0x7; ret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, &arg); } Due to the address and size are not valid there is a failure in amdgpu_hmm_register->mmu_interval_notifier_insert->__mmu_interval_notifier_insert-> check_shl_overflow, but we even the amdgpu_hmm_register failure we still call amdgpu_hmm_unregister into amdgpu_gem_object_free which causes access to a bad address. The following stack is below when the issue is reproduced when Kazan is enabled: [ +0.000014] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020 [ +0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340 [ +0.000017] Code: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff <0f> 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80 [ +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246 [ +0.000013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b [ +0.000011] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8881a9f78260 [ +0.000010] RBP: ffffc90002657a70 R08: 0000000000000001 R09: fffff520004caf25 [ +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00 [ +0.000010] R13: ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260 [ +0.000011] FS: 00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:0000000000000000 [ +0.000012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0 [ +0.000010] Call Trace: [ +0.000006] <TASK> [ +0.000007] ? show_regs+0x6a/0x80 [ +0.000018] ? __warn+0xa5/0x1b0 [ +0.000019] ? mmu_interval_notifier_remove+0x327/0x340 [ +0.000018] ? report_bug+0x24a/0x290 [ +0.000022] ? handle_bug+0x46/0x90 [ +0.000015] ? exc_invalid_op+0x19/0x50 [ +0.000016] ? asm_exc_invalid_op+0x1b/0x20 [ +0.000017] ? kasan_save_stack+0x26/0x50 [ +0.000017] ? mmu_interval_notifier_remove+0x23b/0x340 [ +0.000019] ? mmu_interval_notifier_remove+0x327/0x340 [ +0.000019] ? mmu_interval_notifier_remove+0x23b/0x340 [ +0.000020] ? __pfx_mmu_interval_notifier_remove+0x10/0x10 [ +0.000017] ? kasan_save_alloc_info+0x1e/0x30 [ +0.000018] ? srso_return_thunk+0x5/0x5f [ +0.000014] ? __kasan_kmalloc+0xb1/0xc0 [ +0.000018] ? srso_return_thunk+0x5/0x5f [ +0.000013] ? __kasan_check_read+0x11/0x20 [ +0.000020] amdgpu_hmm_unregister+0x34/0x50 [amdgpu] [ +0.004695] amdgpu_gem_object_free+0x66/0xa0 [amdgpu] [ +0.004534] ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu] [ +0.004291] ? do_syscall_64+0x5f/0xe0 [ +0.000023] ? srso_return_thunk+0x5/0x5f [ +0.000017] drm_gem_object_free+0x3b/0x50 [drm] [ +0.000489] amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu] [ +0.004295] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004270] ? srso_return_thunk+0x5/0x5f [ +0.000014] ? __this_cpu_preempt_check+0x13/0x20 [ +0.000015] ? srso_return_thunk+0x5/0x5f [ +0.000013] ? sysvec_apic_timer_interrupt+0x57/0xc0 [ +0.000020] ? srso_return_thunk+0x5/0x5f [ +0.000014] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ +0.000022] ? drm_ioctl_kernel+0x17b/0x1f0 [drm] [ +0.000496] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004272] ? drm_ioctl_kernel+0x190/0x1f0 [drm] [ +0.000492] drm_ioctl_kernel+0x140/0x1f0 [drm] [ +0.000497] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004297] ? __pfx_drm_ioctl_kernel+0x10/0x10 [d ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 2e13f88e01ae7e28a7e831bf5c2409c4748e0a60 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < e87e08c94c9541b4e18c4c13f2f605935f512605 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < af054a5fb24a144f99895afce9519d709891894c (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 22f665ecfd1225afa1309ace623157d12bb9bb0c (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 22207fd5c80177b860279653d017474b2812af5e (git)
Create a notification for this product.
Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 6.1.132 , ≤ 6.1.* (semver)
Unaffected: 6.6.24 , ≤ 6.6.* (semver)
Unaffected: 6.7.12 , ≤ 6.7.* (semver)
Unaffected: 6.8.3 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix use-after-free bug\n\nThe bug can be triggered by sending a single amdgpu_gem_userptr_ioctl\nto the AMDGPU DRM driver on any ASICs with an invalid address and size.\nThe bug was reported by Joonkyo Jung \u003cjoonkyoj@yonsei.ac.kr\u003e.\nFor example the following code:\n\nstatic void Syzkaller1(int fd)\n{\n\tstruct drm_amdgpu_gem_userptr arg;\n\tint ret;\n\n\targ.addr = 0xffffffffffff0000;\n\targ.size = 0x80000000; /*2 Gb*/\n\targ.flags = 0x7;\n\tret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, \u0026arg);\n}\n\nDue to the address and size are not valid there is a failure in\namdgpu_hmm_register-\u003emmu_interval_notifier_insert-\u003e__mmu_interval_notifier_insert-\u003e\ncheck_shl_overflow, but we even the amdgpu_hmm_register failure we still call\namdgpu_hmm_unregister into  amdgpu_gem_object_free which causes access to a bad address.\nThe following stack is below when the issue is reproduced when Kazan is enabled:\n\n[  +0.000014] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\n[  +0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340\n[  +0.000017] Code: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff \u003c0f\u003e 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80\n[  +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246\n[  +0.000013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b\n[  +0.000011] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8881a9f78260\n[  +0.000010] RBP: ffffc90002657a70 R08: 0000000000000001 R09: fffff520004caf25\n[  +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00\n[  +0.000010] R13: ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260\n[  +0.000011] FS:  00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:0000000000000000\n[  +0.000012] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  +0.000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0\n[  +0.000010] Call Trace:\n[  +0.000006]  \u003cTASK\u003e\n[  +0.000007]  ? show_regs+0x6a/0x80\n[  +0.000018]  ? __warn+0xa5/0x1b0\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\n[  +0.000018]  ? report_bug+0x24a/0x290\n[  +0.000022]  ? handle_bug+0x46/0x90\n[  +0.000015]  ? exc_invalid_op+0x19/0x50\n[  +0.000016]  ? asm_exc_invalid_op+0x1b/0x20\n[  +0.000017]  ? kasan_save_stack+0x26/0x50\n[  +0.000017]  ? mmu_interval_notifier_remove+0x23b/0x340\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\n[  +0.000019]  ? mmu_interval_notifier_remove+0x23b/0x340\n[  +0.000020]  ? __pfx_mmu_interval_notifier_remove+0x10/0x10\n[  +0.000017]  ? kasan_save_alloc_info+0x1e/0x30\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\n[  +0.000014]  ? __kasan_kmalloc+0xb1/0xc0\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\n[  +0.000013]  ? __kasan_check_read+0x11/0x20\n[  +0.000020]  amdgpu_hmm_unregister+0x34/0x50 [amdgpu]\n[  +0.004695]  amdgpu_gem_object_free+0x66/0xa0 [amdgpu]\n[  +0.004534]  ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu]\n[  +0.004291]  ? do_syscall_64+0x5f/0xe0\n[  +0.000023]  ? srso_return_thunk+0x5/0x5f\n[  +0.000017]  drm_gem_object_free+0x3b/0x50 [drm]\n[  +0.000489]  amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu]\n[  +0.004295]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\n[  +0.004270]  ? srso_return_thunk+0x5/0x5f\n[  +0.000014]  ? __this_cpu_preempt_check+0x13/0x20\n[  +0.000015]  ? srso_return_thunk+0x5/0x5f\n[  +0.000013]  ? sysvec_apic_timer_interrupt+0x57/0xc0\n[  +0.000020]  ? srso_return_thunk+0x5/0x5f\n[  +0.000014]  ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[  +0.000022]  ? drm_ioctl_kernel+0x17b/0x1f0 [drm]\n[  +0.000496]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\n[  +0.004272]  ? drm_ioctl_kernel+0x190/0x1f0 [drm]\n[  +0.000492]  drm_ioctl_kernel+0x140/0x1f0 [drm]\n[  +0.000497]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\n[  +0.004297]  ? __pfx_drm_ioctl_kernel+0x10/0x10 [d\n---truncated---"
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:01:37.568Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2e13f88e01ae7e28a7e831bf5c2409c4748e0a60"
        },
        {
          "url": "https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605"
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      "title": "drm/amdgpu: fix use-after-free bug",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26656",
    "datePublished": "2024-04-02T06:08:43.558Z",
    "dateReserved": "2024-02-19T14:20:24.145Z",
    "dateUpdated": "2026-05-11T20:01:37.568Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-26656",
      "date": "2026-05-20",
      "epss": "0.00011",
      "percentile": "0.0139"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: fix use-after-free bug\\n\\nThe bug can be triggered by sending a single amdgpu_gem_userptr_ioctl\\nto the AMDGPU DRM driver on any ASICs with an invalid address and size.\\nThe bug was reported by Joonkyo Jung \u003cjoonkyoj@yonsei.ac.kr\u003e.\\nFor example the following code:\\n\\nstatic void Syzkaller1(int fd)\\n{\\n\\tstruct drm_amdgpu_gem_userptr arg;\\n\\tint ret;\\n\\n\\targ.addr = 0xffffffffffff0000;\\n\\targ.size = 0x80000000; /*2 Gb*/\\n\\targ.flags = 0x7;\\n\\tret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, \u0026arg);\\n}\\n\\nDue to the address and size are not valid there is a failure in\\namdgpu_hmm_register-\u003emmu_interval_notifier_insert-\u003e__mmu_interval_notifier_insert-\u003e\\ncheck_shl_overflow, but we even the amdgpu_hmm_register failure we still call\\namdgpu_hmm_unregister into  amdgpu_gem_object_free which causes access to a bad address.\\nThe following stack is below when the issue is reproduced when Kazan is enabled:\\n\\n[  +0.000014] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\\n[  +0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000017] Code: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff \u003c0f\u003e 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80\\n[  +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246\\n[  +0.000013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b\\n[  +0.000011] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8881a9f78260\\n[  +0.000010] RBP: ffffc90002657a70 R08: 0000000000000001 R09: fffff520004caf25\\n[  +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00\\n[  +0.000010] R13: ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260\\n[  +0.000011] FS:  00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:0000000000000000\\n[  +0.000012] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[  +0.000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0\\n[  +0.000010] Call Trace:\\n[  +0.000006]  \u003cTASK\u003e\\n[  +0.000007]  ? show_regs+0x6a/0x80\\n[  +0.000018]  ? __warn+0xa5/0x1b0\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000018]  ? report_bug+0x24a/0x290\\n[  +0.000022]  ? handle_bug+0x46/0x90\\n[  +0.000015]  ? exc_invalid_op+0x19/0x50\\n[  +0.000016]  ? asm_exc_invalid_op+0x1b/0x20\\n[  +0.000017]  ? kasan_save_stack+0x26/0x50\\n[  +0.000017]  ? mmu_interval_notifier_remove+0x23b/0x340\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x23b/0x340\\n[  +0.000020]  ? __pfx_mmu_interval_notifier_remove+0x10/0x10\\n[  +0.000017]  ? kasan_save_alloc_info+0x1e/0x30\\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? __kasan_kmalloc+0xb1/0xc0\\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000013]  ? __kasan_check_read+0x11/0x20\\n[  +0.000020]  amdgpu_hmm_unregister+0x34/0x50 [amdgpu]\\n[  +0.004695]  amdgpu_gem_object_free+0x66/0xa0 [amdgpu]\\n[  +0.004534]  ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu]\\n[  +0.004291]  ? do_syscall_64+0x5f/0xe0\\n[  +0.000023]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000017]  drm_gem_object_free+0x3b/0x50 [drm]\\n[  +0.000489]  amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu]\\n[  +0.004295]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004270]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? __this_cpu_preempt_check+0x13/0x20\\n[  +0.000015]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000013]  ? sysvec_apic_timer_interrupt+0x57/0xc0\\n[  +0.000020]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\\n[  +0.000022]  ? drm_ioctl_kernel+0x17b/0x1f0 [drm]\\n[  +0.000496]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004272]  ? drm_ioctl_kernel+0x190/0x1f0 [drm]\\n[  +0.000492]  drm_ioctl_kernel+0x140/0x1f0 [drm]\\n[  +0.000497]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004297]  ? __pfx_drm_ioctl_kernel+0x10/0x10 [d\\n---truncated---\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: drm/amdgpu: corrige el error de use-after-free. El error se puede activar enviando un solo amdgpu_gem_userptr_ioctl al controlador DRM AMDGPU en cualquier ASIC con una direcci\\u00f3n y tama\\u00f1o no v\\u00e1lidos. El error fue reportado por Joonkyo Jung . Por ejemplo, el siguiente c\\u00f3digo: static void Syzkaller1(int fd) { struct drm_amdgpu_gem_userptr arg; ret int; arg.addr = 0xffffffffffff0000; arg.tama\\u00f1o = 0x80000000; /*2 Gb*/ arg.flags = 0x7; ret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, \u0026amp;arg); } Debido a que la direcci\\u00f3n y el tama\\u00f1o no son v\\u00e1lidos, hay una falla en amdgpu_hmm_register-\u0026gt;mmu_interval_notifier_insert-\u0026gt;__mmu_interval_notifier_insert-\u0026gt; check_shl_overflow, pero incluso en la falla de amdgpu_hmm_register todav\\u00eda llamamos a amdgpu_hmm_unregister en amdgpu_gem_object_free, lo que provoca el acceso a una direcci\\u00f3n incorrecta. La siguiente pila se muestra a continuaci\\u00f3n cuando el problema se reproduce cuando Kazan est\\u00e1 habilitado: [+0.000014] Nombre del hardware: Nombre del producto del sistema ASUS/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 03/12/2020 [+0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340 [ +0.000017] C\\u00f3digo: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff \u0026lt;0f\u0026gt; 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80 [ +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246 [ +0.000 013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b [ +0.000011] RDX: dffffc0000000000 RSI: 00000000000000004 RDI: ffff8881a9f78260 [ +0.000010] RBP: ffffc90002 657a70 R08: 0000000000000001 R09: fffff520004caf25 [ +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00 [ +0.000010] R1 3 : ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260 [ +0.000011] FS: 00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:000000000 0000000 [ +0,000012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0,000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0 [+0.000010] Seguimiento de llamadas: [+0.000006]  [+0.000007] ? show_regs+0x6a/0x80 [+0.000018]? __advertir+0xa5/0x1b0 [ +0.000019] ? mmu_interval_notifier_remove+0x327/0x340 [+0.000018]? report_bug+0x24a/0x290 [+0.000022] ? handle_bug+0x46/0x90 [+0.000015]? exc_invalid_op+0x19/0x50 [+0.000016]? asm_exc_invalid_op+0x1b/0x20 [+0.000017]? kasan_save_stack+0x26/0x50 [+0.000017]? mmu_interval_notifier_remove+0x23b/0x340 [+0.000019]? mmu_interval_notifier_remove+0x327/0x340 [+0.000019]? mmu_interval_notifier_remove+0x23b/0x340 [+0.000020]? __pfx_mmu_interval_notifier_remove+0x10/0x10 [ +0.000017] ? kasan_save_alloc_info+0x1e/0x30 [ +0.000018] ? srso_return_thunk+0x5/0x5f [+0.000014]? __kasan_kmalloc+0xb1/0xc0 [ +0.000018] ? srso_return_thunk+0x5/0x5f [+0.000013]? __kasan_check_read+0x11/0x20 [ +0.000020] amdgpu_hmm_unregister+0x34/0x50 [amdgpu] [ +0.004695] amdgpu_gem_object_free+0x66/0xa0 [amdgpu] [ +0.004534] ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu] [ +0.004291] ? do_syscall_64+0x5f/0xe0 [+0.000023]? srso_return_thunk+0x5/0x5f [ +0.000017] drm_gem_object_free+0x3b/0x50 [drm] [ +0.000489] amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu] [ +0.004295] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004270] ? srso_return_thunk+0x5/0x5f [+0.000014]? __this_cpu_preempt_check+0x13/0x20 [ +0.000015] ? srso_return_thunk+0x5/0x5f [+0.000013]? sysvec_apic_timer_interrupt+0x57/0xc0 [+0.000020]? srso_return_thunk+0x5/0x5f [+0.000014]? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [+0.000022]? drm_ioctl_kernel+0x17b/0x1f0 [drm] [ +0.000496] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004272] ? drm_ioctl_kernel+0x190/0x1f0 [drm] [ +0.000492] drm_ioctl_kernel+0x140/0x1f0 [drm] [ +0.000497] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004297] ? __pfx_drm_ioctl_kernel+0x10/0x10 [d ---truncado---\"}]",
      "id": "CVE-2024-26656",
      "lastModified": "2024-11-21T09:02:46.717",
      "published": "2024-04-02T07:15:42.760",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/22207fd5c80177b860279653d017474b2812af5e\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/22f665ecfd1225afa1309ace623157d12bb9bb0c\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/af054a5fb24a144f99895afce9519d709891894c\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/22207fd5c80177b860279653d017474b2812af5e\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/22f665ecfd1225afa1309ace623157d12bb9bb0c\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/af054a5fb24a144f99895afce9519d709891894c\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26656\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-02T07:15:42.760\",\"lastModified\":\"2025-11-03T20:16:10.257\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: fix use-after-free bug\\n\\nThe bug can be triggered by sending a single amdgpu_gem_userptr_ioctl\\nto the AMDGPU DRM driver on any ASICs with an invalid address and size.\\nThe bug was reported by Joonkyo Jung \u003cjoonkyoj@yonsei.ac.kr\u003e.\\nFor example the following code:\\n\\nstatic void Syzkaller1(int fd)\\n{\\n\\tstruct drm_amdgpu_gem_userptr arg;\\n\\tint ret;\\n\\n\\targ.addr = 0xffffffffffff0000;\\n\\targ.size = 0x80000000; /*2 Gb*/\\n\\targ.flags = 0x7;\\n\\tret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, \u0026arg);\\n}\\n\\nDue to the address and size are not valid there is a failure in\\namdgpu_hmm_register-\u003emmu_interval_notifier_insert-\u003e__mmu_interval_notifier_insert-\u003e\\ncheck_shl_overflow, but we even the amdgpu_hmm_register failure we still call\\namdgpu_hmm_unregister into  amdgpu_gem_object_free which causes access to a bad address.\\nThe following stack is below when the issue is reproduced when Kazan is enabled:\\n\\n[  +0.000014] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\\n[  +0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000017] Code: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff \u003c0f\u003e 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80\\n[  +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246\\n[  +0.000013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b\\n[  +0.000011] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8881a9f78260\\n[  +0.000010] RBP: ffffc90002657a70 R08: 0000000000000001 R09: fffff520004caf25\\n[  +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00\\n[  +0.000010] R13: ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260\\n[  +0.000011] FS:  00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:0000000000000000\\n[  +0.000012] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[  +0.000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0\\n[  +0.000010] Call Trace:\\n[  +0.000006]  \u003cTASK\u003e\\n[  +0.000007]  ? show_regs+0x6a/0x80\\n[  +0.000018]  ? __warn+0xa5/0x1b0\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000018]  ? report_bug+0x24a/0x290\\n[  +0.000022]  ? handle_bug+0x46/0x90\\n[  +0.000015]  ? exc_invalid_op+0x19/0x50\\n[  +0.000016]  ? asm_exc_invalid_op+0x1b/0x20\\n[  +0.000017]  ? kasan_save_stack+0x26/0x50\\n[  +0.000017]  ? mmu_interval_notifier_remove+0x23b/0x340\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x23b/0x340\\n[  +0.000020]  ? __pfx_mmu_interval_notifier_remove+0x10/0x10\\n[  +0.000017]  ? kasan_save_alloc_info+0x1e/0x30\\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? __kasan_kmalloc+0xb1/0xc0\\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000013]  ? __kasan_check_read+0x11/0x20\\n[  +0.000020]  amdgpu_hmm_unregister+0x34/0x50 [amdgpu]\\n[  +0.004695]  amdgpu_gem_object_free+0x66/0xa0 [amdgpu]\\n[  +0.004534]  ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu]\\n[  +0.004291]  ? do_syscall_64+0x5f/0xe0\\n[  +0.000023]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000017]  drm_gem_object_free+0x3b/0x50 [drm]\\n[  +0.000489]  amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu]\\n[  +0.004295]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004270]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? __this_cpu_preempt_check+0x13/0x20\\n[  +0.000015]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000013]  ? sysvec_apic_timer_interrupt+0x57/0xc0\\n[  +0.000020]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\\n[  +0.000022]  ? drm_ioctl_kernel+0x17b/0x1f0 [drm]\\n[  +0.000496]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004272]  ? drm_ioctl_kernel+0x190/0x1f0 [drm]\\n[  +0.000492]  drm_ioctl_kernel+0x140/0x1f0 [drm]\\n[  +0.000497]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004297]  ? __pfx_drm_ioctl_kernel+0x10/0x10 [d\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm/amdgpu: corrige el error de use-after-free. El error se puede activar enviando un solo amdgpu_gem_userptr_ioctl al controlador DRM AMDGPU en cualquier ASIC con una direcci\u00f3n y tama\u00f1o no v\u00e1lidos. El error fue reportado por Joonkyo Jung . Por ejemplo, el siguiente c\u00f3digo: static void Syzkaller1(int fd) { struct drm_amdgpu_gem_userptr arg; ret int; arg.addr = 0xffffffffffff0000; arg.tama\u00f1o = 0x80000000; /*2 Gb*/ arg.flags = 0x7; ret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, \u0026amp;arg); } Debido a que la direcci\u00f3n y el tama\u00f1o no son v\u00e1lidos, hay una falla en amdgpu_hmm_register-\u0026gt;mmu_interval_notifier_insert-\u0026gt;__mmu_interval_notifier_insert-\u0026gt; check_shl_overflow, pero incluso en la falla de amdgpu_hmm_register todav\u00eda llamamos a amdgpu_hmm_unregister en amdgpu_gem_object_free, lo que provoca el acceso a una direcci\u00f3n incorrecta. La siguiente pila se muestra a continuaci\u00f3n cuando el problema se reproduce cuando Kazan est\u00e1 habilitado: [+0.000014] Nombre del hardware: Nombre del producto del sistema ASUS/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 03/12/2020 [+0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340 [ +0.000017] C\u00f3digo: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff \u0026lt;0f\u0026gt; 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80 [ +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246 [ +0.000 013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b [ +0.000011] RDX: dffffc0000000000 RSI: 00000000000000004 RDI: ffff8881a9f78260 [ +0.000010] RBP: ffffc90002 657a70 R08: 0000000000000001 R09: fffff520004caf25 [ +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00 [ +0.000010] R1 3 : ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260 [ +0.000011] FS: 00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:000000000 0000000 [ +0,000012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0,000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0 [+0.000010] Seguimiento de llamadas: [+0.000006]  [+0.000007] ? show_regs+0x6a/0x80 [+0.000018]? __advertir+0xa5/0x1b0 [ +0.000019] ? mmu_interval_notifier_remove+0x327/0x340 [+0.000018]? report_bug+0x24a/0x290 [+0.000022] ? handle_bug+0x46/0x90 [+0.000015]? exc_invalid_op+0x19/0x50 [+0.000016]? asm_exc_invalid_op+0x1b/0x20 [+0.000017]? kasan_save_stack+0x26/0x50 [+0.000017]? mmu_interval_notifier_remove+0x23b/0x340 [+0.000019]? mmu_interval_notifier_remove+0x327/0x340 [+0.000019]? mmu_interval_notifier_remove+0x23b/0x340 [+0.000020]? __pfx_mmu_interval_notifier_remove+0x10/0x10 [ +0.000017] ? kasan_save_alloc_info+0x1e/0x30 [ +0.000018] ? srso_return_thunk+0x5/0x5f [+0.000014]? __kasan_kmalloc+0xb1/0xc0 [ +0.000018] ? srso_return_thunk+0x5/0x5f [+0.000013]? __kasan_check_read+0x11/0x20 [ +0.000020] amdgpu_hmm_unregister+0x34/0x50 [amdgpu] [ +0.004695] amdgpu_gem_object_free+0x66/0xa0 [amdgpu] [ +0.004534] ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu] [ +0.004291] ? do_syscall_64+0x5f/0xe0 [+0.000023]? srso_return_thunk+0x5/0x5f [ +0.000017] drm_gem_object_free+0x3b/0x50 [drm] [ +0.000489] amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu] [ +0.004295] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004270] ? srso_return_thunk+0x5/0x5f [+0.000014]? __this_cpu_preempt_check+0x13/0x20 [ +0.000015] ? srso_return_thunk+0x5/0x5f [+0.000013]? sysvec_apic_timer_interrupt+0x57/0xc0 [+0.000020]? srso_return_thunk+0x5/0x5f [+0.000014]? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [+0.000022]? drm_ioctl_kernel+0x17b/0x1f0 [drm] [ +0.000496] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004272] ? drm_ioctl_kernel+0x190/0x1f0 [drm] [ +0.000492] drm_ioctl_kernel+0x140/0x1f0 [drm] [ +0.000497] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004297] ? __pfx_drm_ioctl_kernel+0x10/0x10 [d ---truncado---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.9\",\"matchCriteriaId\":\"18FE1EAE-C36C-49FC-A5E0-0A661CDC561E\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/22207fd5c80177b860279653d017474b2812af5e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/22f665ecfd1225afa1309ace623157d12bb9bb0c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2e13f88e01ae7e28a7e831bf5c2409c4748e0a60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af054a5fb24a144f99895afce9519d709891894c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/22207fd5c80177b860279653d017474b2812af5e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/22f665ecfd1225afa1309ace623157d12bb9bb0c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/af054a5fb24a144f99895afce9519d709891894c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/af054a5fb24a144f99895afce9519d709891894c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/22f665ecfd1225afa1309ace623157d12bb9bb0c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/22207fd5c80177b860279653d017474b2812af5e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T19:29:28.444Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26656\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-02T14:54:50.822759Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-05T15:20:38.674Z\"}}], \"cna\": {\"title\": \"drm/amdgpu: fix use-after-free bug\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"2e13f88e01ae7e28a7e831bf5c2409c4748e0a60\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"e87e08c94c9541b4e18c4c13f2f605935f512605\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"af054a5fb24a144f99895afce9519d709891894c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"22f665ecfd1225afa1309ace623157d12bb9bb0c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"22207fd5c80177b860279653d017474b2812af5e\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.132\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.24\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2e13f88e01ae7e28a7e831bf5c2409c4748e0a60\"}, {\"url\": \"https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605\"}, {\"url\": \"https://git.kernel.org/stable/c/af054a5fb24a144f99895afce9519d709891894c\"}, {\"url\": \"https://git.kernel.org/stable/c/22f665ecfd1225afa1309ace623157d12bb9bb0c\"}, {\"url\": \"https://git.kernel.org/stable/c/22207fd5c80177b860279653d017474b2812af5e\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: fix use-after-free bug\\n\\nThe bug can be triggered by sending a single amdgpu_gem_userptr_ioctl\\nto the AMDGPU DRM driver on any ASICs with an invalid address and size.\\nThe bug was reported by Joonkyo Jung \u003cjoonkyoj@yonsei.ac.kr\u003e.\\nFor example the following code:\\n\\nstatic void Syzkaller1(int fd)\\n{\\n\\tstruct drm_amdgpu_gem_userptr arg;\\n\\tint ret;\\n\\n\\targ.addr = 0xffffffffffff0000;\\n\\targ.size = 0x80000000; /*2 Gb*/\\n\\targ.flags = 0x7;\\n\\tret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, \u0026arg);\\n}\\n\\nDue to the address and size are not valid there is a failure in\\namdgpu_hmm_register-\u003emmu_interval_notifier_insert-\u003e__mmu_interval_notifier_insert-\u003e\\ncheck_shl_overflow, but we even the amdgpu_hmm_register failure we still call\\namdgpu_hmm_unregister into  amdgpu_gem_object_free which causes access to a bad address.\\nThe following stack is below when the issue is reproduced when Kazan is enabled:\\n\\n[  +0.000014] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020\\n[  +0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000017] Code: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff \u003c0f\u003e 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80\\n[  +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246\\n[  +0.000013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b\\n[  +0.000011] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8881a9f78260\\n[  +0.000010] RBP: ffffc90002657a70 R08: 0000000000000001 R09: fffff520004caf25\\n[  +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00\\n[  +0.000010] R13: ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260\\n[  +0.000011] FS:  00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:0000000000000000\\n[  +0.000012] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[  +0.000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0\\n[  +0.000010] Call Trace:\\n[  +0.000006]  \u003cTASK\u003e\\n[  +0.000007]  ? show_regs+0x6a/0x80\\n[  +0.000018]  ? __warn+0xa5/0x1b0\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000018]  ? report_bug+0x24a/0x290\\n[  +0.000022]  ? handle_bug+0x46/0x90\\n[  +0.000015]  ? exc_invalid_op+0x19/0x50\\n[  +0.000016]  ? asm_exc_invalid_op+0x1b/0x20\\n[  +0.000017]  ? kasan_save_stack+0x26/0x50\\n[  +0.000017]  ? mmu_interval_notifier_remove+0x23b/0x340\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x327/0x340\\n[  +0.000019]  ? mmu_interval_notifier_remove+0x23b/0x340\\n[  +0.000020]  ? __pfx_mmu_interval_notifier_remove+0x10/0x10\\n[  +0.000017]  ? kasan_save_alloc_info+0x1e/0x30\\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? __kasan_kmalloc+0xb1/0xc0\\n[  +0.000018]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000013]  ? __kasan_check_read+0x11/0x20\\n[  +0.000020]  amdgpu_hmm_unregister+0x34/0x50 [amdgpu]\\n[  +0.004695]  amdgpu_gem_object_free+0x66/0xa0 [amdgpu]\\n[  +0.004534]  ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu]\\n[  +0.004291]  ? do_syscall_64+0x5f/0xe0\\n[  +0.000023]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000017]  drm_gem_object_free+0x3b/0x50 [drm]\\n[  +0.000489]  amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu]\\n[  +0.004295]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004270]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? __this_cpu_preempt_check+0x13/0x20\\n[  +0.000015]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000013]  ? sysvec_apic_timer_interrupt+0x57/0xc0\\n[  +0.000020]  ? srso_return_thunk+0x5/0x5f\\n[  +0.000014]  ? asm_sysvec_apic_timer_interrupt+0x1b/0x20\\n[  +0.000022]  ? drm_ioctl_kernel+0x17b/0x1f0 [drm]\\n[  +0.000496]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004272]  ? drm_ioctl_kernel+0x190/0x1f0 [drm]\\n[  +0.000492]  drm_ioctl_kernel+0x140/0x1f0 [drm]\\n[  +0.000497]  ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu]\\n[  +0.004297]  ? __pfx_drm_ioctl_kernel+0x10/0x10 [d\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.132\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.24\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.12\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.3\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"4.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:01:37.568Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26656\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:01:37.568Z\", \"dateReserved\": \"2024-02-19T14:20:24.145Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-02T06:08:43.558Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.