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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 · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:25 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
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": "2026-09-16",
      "epss": "0.00247",
      "percentile": "0.16161"
    },
    "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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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-21865",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-21865.json",
      "version": "51"
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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

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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.