CVE-2025-21865 (GCVE-0-2025-21865)

Vulnerability from cvelistv5 – Published: 2025-03-12 09:42 – Updated: 2026-07-14 12:40
VLAI
Title
gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().
Summary
In the Linux kernel, the following vulnerability has been resolved: gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl(). Brad Spengler reported the list_del() corruption splat in gtp_net_exit_batch_rtnl(). [0] Commit eb28fd76c0a0 ("gtp: Destroy device along with udp socket's netns dismantle.") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl() to destroy devices in each netns as done in geneve and ip tunnels. However, this could trigger ->dellink() twice for the same device during ->exit_batch_rtnl(). Say we have two netns A & B and gtp device B that resides in netns B but whose UDP socket is in netns A. 1. cleanup_net() processes netns A and then B. 2. gtp_net_exit_batch_rtnl() finds the device B while iterating netns A's gn->gtp_dev_list and calls ->dellink(). [ device B is not yet unlinked from netns B as unregister_netdevice_many() has not been called. ] 3. gtp_net_exit_batch_rtnl() finds the device B while iterating netns B's for_each_netdev() and calls ->dellink(). gtp_dellink() cleans up the device's hash table, unlinks the dev from gn->gtp_dev_list, and calls unregister_netdevice_queue(). Basically, calling gtp_dellink() multiple times is fine unless CONFIG_DEBUG_LIST is enabled. Let's remove for_each_netdev() in gtp_net_exit_batch_rtnl() and delegate the destruction to default_device_exit_batch() as done in bareudp. [0]: list_del corruption, ffff8880aaa62c00->next (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04) kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G T 6.12.13-grsec-full-20250211091339 #1 Tainted: [T]=RANDSTRUCT Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:[<ffffffff84947381>] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 Code: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc <0f> 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60 RSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283 RAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054 RDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000 RBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32 R10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4 R13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08 RBX: kasan shadow of 0x0 RCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554 RDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 RSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71 RBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object] RSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ] R09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ] R10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ] R15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object] FS: 0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0 Stack: 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00 ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d Call Trace: <TASK> [<ffffffff8a0c360d>] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28 [<ffffffff8a0c360d>] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28 [<ffffffff8a0c360d>] list_del include/linux/list.h:262 [inl ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c986380c1d5274c4d5e935addc807d6791cc23eb , < 7f86fb07db65a470d0c11f79da551bd9466357dc (git)
Affected: 5f1678346109ff3a6d229d33437fcba3cce9209d , < 33eb925c0c26e86ca540a08254806512bf911f22 (git)
Affected: 036f8d814a2cd11ee8ef62b8f3e7ce5dec0ee4f3 , < cb15bb1bde0ba97cbbed9508e45210dcafec3657 (git)
Affected: efec287cbac92ac6ee8312a89221854760e13b34 , < b70fa591b066d52b141fc430ffdee35b6cc87a66 (git)
Affected: bb11f992f5a475bc68ef959f17a55306f0328495 , < 9d03e7e37187ae140e716377599493987fb20c5b (git)
Affected: 86f73d4ab2f27deeff22ba9336ad103d94f12ac7 , < ff81b14010362f6188ca26fec22ff05e4da45595 (git)
Affected: eb28fd76c0a08a47b470677c6cef9dd1c60e92d1 , < 37e7644b961600ef0beb01d3970c3034a62913af (git)
Affected: eb28fd76c0a08a47b470677c6cef9dd1c60e92d1 , < 4ccacf86491d33d2486b62d4d44864d7101b299d (git)
Affected: 5.4.290 , < 5.4.291 (semver)
Affected: 5.10.234 , < 5.10.235 (semver)
Affected: 5.15.177 , < 5.15.179 (semver)
Affected: 6.1.127 , < 6.1.130 (semver)
Affected: 6.6.74 , < 6.6.80 (semver)
Affected: 6.12.11 , < 6.12.17 (semver)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 5.4.291 , ≤ 5.4.* (semver)
Unaffected: 5.10.235 , ≤ 5.10.* (semver)
Unaffected: 5.15.179 , ≤ 5.15.* (semver)
Unaffected: 6.1.130 , ≤ 6.1.* (semver)
Unaffected: 6.6.80 , ≤ 6.6.* (semver)
Unaffected: 6.12.17 , ≤ 6.12.* (semver)
Unaffected: 6.13.5 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().\n\nBrad Spengler reported the list_del() corruption splat in\ngtp_net_exit_batch_rtnl(). [0]\n\nCommit eb28fd76c0a0 (\"gtp: Destroy device along with udp socket\u0027s netns\ndismantle.\") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl()\nto destroy devices in each netns as done in geneve and ip tunnels.\n\nHowever, this could trigger -\u003edellink() twice for the same device during\n-\u003eexit_batch_rtnl().\n\nSay we have two netns A \u0026 B and gtp device B that resides in netns B but\nwhose UDP socket is in netns A.\n\n  1. cleanup_net() processes netns A and then B.\n\n  2. gtp_net_exit_batch_rtnl() finds the device B while iterating\n     netns A\u0027s gn-\u003egtp_dev_list and calls -\u003edellink().\n\n  [ device B is not yet unlinked from netns B\n    as unregister_netdevice_many() has not been called. ]\n\n  3. gtp_net_exit_batch_rtnl() finds the device B while iterating\n     netns B\u0027s for_each_netdev() and calls -\u003edellink().\n\ngtp_dellink() cleans up the device\u0027s hash table, unlinks the dev from\ngn-\u003egtp_dev_list, and calls unregister_netdevice_queue().\n\nBasically, calling gtp_dellink() multiple times is fine unless\nCONFIG_DEBUG_LIST is enabled.\n\nLet\u0027s remove for_each_netdev() in gtp_net_exit_batch_rtnl() and\ndelegate the destruction to default_device_exit_batch() as done\nin bareudp.\n\n[0]:\nlist_del corruption, ffff8880aaa62c00-\u003enext (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04)\nkernel BUG at lib/list_debug.c:58!\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN\nCPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G                T   6.12.13-grsec-full-20250211091339 #1\nTainted: [T]=RANDSTRUCT\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: netns cleanup_net\nRIP: 0010:[\u003cffffffff84947381\u003e] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\nCode: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc \u003c0f\u003e 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60\nRSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283\nRAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054\nRDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000\nRBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32\nR10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4\nR13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08\nRBX: kasan shadow of 0x0\nRCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554\nRDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\nRSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71\nRBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]\nRSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ]\nR09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ]\nR10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ]\nR15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object]\nFS:  0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0\nStack:\n 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00\n ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005\n 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d\nCall Trace:\n \u003cTASK\u003e\n [\u003cffffffff8a0c360d\u003e] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28\n [\u003cffffffff8a0c360d\u003e] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28\n [\u003cffffffff8a0c360d\u003e] list_del include/linux/list.h:262 [inl\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:57:19.306Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7f86fb07db65a470d0c11f79da551bd9466357dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/33eb925c0c26e86ca540a08254806512bf911f22"
        },
        {
          "url": "https://git.kernel.org/stable/c/cb15bb1bde0ba97cbbed9508e45210dcafec3657"
        },
        {
          "url": "https://git.kernel.org/stable/c/b70fa591b066d52b141fc430ffdee35b6cc87a66"
        },
        {
          "url": "https://git.kernel.org/stable/c/9d03e7e37187ae140e716377599493987fb20c5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff81b14010362f6188ca26fec22ff05e4da45595"
        },
        {
          "url": "https://git.kernel.org/stable/c/37e7644b961600ef0beb01d3970c3034a62913af"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ccacf86491d33d2486b62d4d44864d7101b299d"
        }
      ],
      "title": "gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21865",
    "datePublished": "2025-03-12T09:42:21.901Z",
    "dateReserved": "2024-12-29T08:45:45.781Z",
    "dateUpdated": "2026-07-14T12:40:23.160Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-21865",
      "date": "2026-07-14",
      "epss": "0.00209",
      "percentile": "0.11054"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T02:22:59.000Z",
      "cve": "CVE-2025-21865",
      "id": "msrc_CVE-2025-21865",
      "initial_release_date": "2025-03-02T00:00:00.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-21865.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21865\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-03-12T10:15:19.650\",\"lastModified\":\"2026-06-17T08:44:28.993\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().\\n\\nBrad Spengler reported the list_del() corruption splat in\\ngtp_net_exit_batch_rtnl(). [0]\\n\\nCommit eb28fd76c0a0 (\\\"gtp: Destroy device along with udp socket\u0027s netns\\ndismantle.\\\") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl()\\nto destroy devices in each netns as done in geneve and ip tunnels.\\n\\nHowever, this could trigger -\u003edellink() twice for the same device during\\n-\u003eexit_batch_rtnl().\\n\\nSay we have two netns A \u0026 B and gtp device B that resides in netns B but\\nwhose UDP socket is in netns A.\\n\\n  1. cleanup_net() processes netns A and then B.\\n\\n  2. gtp_net_exit_batch_rtnl() finds the device B while iterating\\n     netns A\u0027s gn-\u003egtp_dev_list and calls -\u003edellink().\\n\\n  [ device B is not yet unlinked from netns B\\n    as unregister_netdevice_many() has not been called. ]\\n\\n  3. gtp_net_exit_batch_rtnl() finds the device B while iterating\\n     netns B\u0027s for_each_netdev() and calls -\u003edellink().\\n\\ngtp_dellink() cleans up the device\u0027s hash table, unlinks the dev from\\ngn-\u003egtp_dev_list, and calls unregister_netdevice_queue().\\n\\nBasically, calling gtp_dellink() multiple times is fine unless\\nCONFIG_DEBUG_LIST is enabled.\\n\\nLet\u0027s remove for_each_netdev() in gtp_net_exit_batch_rtnl() and\\ndelegate the destruction to default_device_exit_batch() as done\\nin bareudp.\\n\\n[0]:\\nlist_del corruption, ffff8880aaa62c00-\u003enext (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04)\\nkernel BUG at lib/list_debug.c:58!\\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN\\nCPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G                T   6.12.13-grsec-full-20250211091339 #1\\nTainted: [T]=RANDSTRUCT\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\\nWorkqueue: netns cleanup_net\\nRIP: 0010:[\u003cffffffff84947381\u003e] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\\nCode: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc \u003c0f\u003e 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60\\nRSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283\\nRAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054\\nRDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000\\nRBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32\\nR10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4\\nR13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08\\nRBX: kasan shadow of 0x0\\nRCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554\\nRDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\\nRSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71\\nRBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]\\nRSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ]\\nR09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ]\\nR10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ]\\nR15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object]\\nFS:  0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0\\nStack:\\n 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00\\n ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005\\n 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d\\nCall Trace:\\n \u003cTASK\u003e\\n [\u003cffffffff8a0c360d\u003e] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28\\n [\u003cffffffff8a0c360d\u003e] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28\\n [\u003cffffffff8a0c360d\u003e] list_del include/linux/list.h:262 [inl\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: gtp: Supresi\u00f3n de la corrupci\u00f3n de listas en gtp_net_exit_batch_rtnl(). Brad Spengler report\u00f3 la corrupci\u00f3n de list_del() en gtp_net_exit_batch_rtnl(). [0] El commit eb28fd76c0a0 (\\\"gtp: Destruir dispositivo junto con el desmantelamiento de netns del socket UDP\\\") a\u00f1adi\u00f3 el bucle for_each_netdev() en gtp_net_exit_batch_rtnl() para destruir dispositivos en cada netns, como se hace en los t\u00faneles geneve e IP. Sin embargo, esto podr\u00eda activar -\u0026gt;dellink() dos veces para el mismo dispositivo durante -\u0026gt;exit_batch_rtnl(). Digamos que tenemos dos netns A y B y un dispositivo gtp B que reside en netns B pero cuyo socket UDP est\u00e1 en netns A. 1. cleanup_net() procesa netns A y luego B. 2. gtp_net_exit_batch_rtnl() encuentra el dispositivo B mientras itera gn-\u0026gt;gtp_dev_list de netns A y llama a -\u0026gt;dellink(). [el dispositivo B a\u00fan no est\u00e1 desvinculado de netns B ya que no se ha llamado a unregister_netdevice_many().] 3. gtp_net_exit_batch_rtnl() encuentra el dispositivo B mientras itera for_each_netdev() de netns B y llama a -\u0026gt;dellink(). gtp_dellink() limpia la tabla hash del dispositivo, desvincula el dev de gn-\u0026gt;gtp_dev_list y llama a unregister_netdevice_queue(). B\u00e1sicamente, llamar a gtp_dellink() varias veces no tiene problema a menos que CONFIG_DEBUG_LIST est\u00e9 habilitado. Eliminemos for_each_netdev() en gtp_net_exit_batch_rtnl() y deleguemos la destrucci\u00f3n a default_device_exit_batch() como se hace en bareudp. [0]: corrupci\u00f3n en list_del, ffff8880aaa62c00-\u0026gt;next (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04) kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G T 6.12.13-grsec-full-20250211091339 #1 Tainted: [T]=RANDSTRUCT Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:[] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 Code: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc \u0026lt;0f\u0026gt; 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60 RSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283 RAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054 RDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000 RBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32 R10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4 R13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08 RBX: kasan shadow of 0x0 RCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554 RDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 RSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71 RBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object] RSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ] R09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ] R10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ] R15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object] FS: 0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0 Stack: 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00 ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d Call Trace:  [] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28 [] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28 [] list_del include/linux/list.h:262 [inl ---truncado---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/gtp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c986380c1d5274c4d5e935addc807d6791cc23eb\",\"lessThan\":\"7f86fb07db65a470d0c11f79da551bd9466357dc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5f1678346109ff3a6d229d33437fcba3cce9209d\",\"lessThan\":\"33eb925c0c26e86ca540a08254806512bf911f22\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"036f8d814a2cd11ee8ef62b8f3e7ce5dec0ee4f3\",\"lessThan\":\"cb15bb1bde0ba97cbbed9508e45210dcafec3657\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"efec287cbac92ac6ee8312a89221854760e13b34\",\"lessThan\":\"b70fa591b066d52b141fc430ffdee35b6cc87a66\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bb11f992f5a475bc68ef959f17a55306f0328495\",\"lessThan\":\"9d03e7e37187ae140e716377599493987fb20c5b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"86f73d4ab2f27deeff22ba9336ad103d94f12ac7\",\"lessThan\":\"ff81b14010362f6188ca26fec22ff05e4da45595\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"eb28fd76c0a08a47b470677c6cef9dd1c60e92d1\",\"lessThan\":\"37e7644b961600ef0beb01d3970c3034a62913af\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"eb28fd76c0a08a47b470677c6cef9dd1c60e92d1\",\"lessThan\":\"4ccacf86491d33d2486b62d4d44864d7101b299d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.4.290\",\"lessThan\":\"5.4.291\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.234\",\"lessThan\":\"5.10.235\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.177\",\"lessThan\":\"5.15.179\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.127\",\"lessThan\":\"6.1.130\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.74\",\"lessThan\":\"6.6.80\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.11\",\"lessThan\":\"6.12.17\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/gtp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.291\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.235\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.179\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.130\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.80\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.17\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13.5\",\"lessThanOrEqual\":\"6.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC 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      "current_release_date": "2026-06-30T00:04:19+00:00",
      "cve": "CVE-2025-21865",
      "id": "CVE-2025-21865",
      "initial_release_date": "2025-03-12T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21865.json",
      "version": "3"
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in\\ngtp_net_exit_batch_rtnl(). [0]\\n\\nCommit eb28fd76c0a0 (\\\"gtp: Destroy device along with udp socket\u0027s netns\\ndismantle.\\\") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl()\\nto destroy devices in each netns as done in geneve and ip tunnels.\\n\\nHowever, this could trigger -\u003edellink() twice for the same device during\\n-\u003eexit_batch_rtnl().\\n\\nSay we have two netns A \u0026 B and gtp device B that resides in netns B but\\nwhose UDP socket is in netns A.\\n\\n  1. cleanup_net() processes netns A and then B.\\n\\n  2. gtp_net_exit_batch_rtnl() finds the device B while iterating\\n     netns A\u0027s gn-\u003egtp_dev_list and calls -\u003edellink().\\n\\n  [ device B is not yet unlinked from netns B\\n    as unregister_netdevice_many() has not been called. ]\\n\\n  3. gtp_net_exit_batch_rtnl() finds the device B while iterating\\n     netns B\u0027s for_each_netdev() and calls -\u003edellink().\\n\\ngtp_dellink() cleans up the device\u0027s hash table, unlinks the dev from\\ngn-\u003egtp_dev_list, and calls unregister_netdevice_queue().\\n\\nBasically, calling gtp_dellink() multiple times is fine unless\\nCONFIG_DEBUG_LIST is enabled.\\n\\nLet\u0027s remove for_each_netdev() in gtp_net_exit_batch_rtnl() and\\ndelegate the destruction to default_device_exit_batch() as done\\nin bareudp.\\n\\n[0]:\\nlist_del corruption, ffff8880aaa62c00-\u003enext (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04)\\nkernel BUG at lib/list_debug.c:58!\\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN\\nCPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G                T   6.12.13-grsec-full-20250211091339 #1\\nTainted: [T]=RANDSTRUCT\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\\nWorkqueue: netns cleanup_net\\nRIP: 0010:[\u003cffffffff84947381\u003e] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\\nCode: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc \u003c0f\u003e 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60\\nRSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283\\nRAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054\\nRDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000\\nRBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32\\nR10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4\\nR13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08\\nRBX: kasan shadow of 0x0\\nRCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554\\nRDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\\nRSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71\\nRBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]\\nRSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ]\\nR09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ]\\nR10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ]\\nR15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object]\\nFS:  0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0\\nStack:\\n 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00\\n ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005\\n 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d\\nCall Trace:\\n \u003cTASK\u003e\\n [\u003cffffffff8a0c360d\u003e] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28\\n [\u003cffffffff8a0c360d\u003e] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28\\n [\u003cffffffff8a0c360d\u003e] list_del include/linux/list.h:262 [inl\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.291\", \"versionStartIncluding\": \"5.4.290\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.235\", \"versionStartIncluding\": \"5.10.234\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.179\", \"versionStartIncluding\": \"5.15.177\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.130\", \"versionStartIncluding\": \"6.1.127\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.80\", \"versionStartIncluding\": \"6.6.74\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.17\", \"versionStartIncluding\": \"6.12.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.5\", \"versionStartIncluding\": \"6.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"6.13\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T15:57:19.306Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21865\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-14T12:40:23.160Z\", \"dateReserved\": \"2024-12-29T08:45:45.781Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-03-12T09:42:21.901Z\", \"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

Author Source Type Date Other

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.