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CVE-2023-53829

Estado: AplazadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

f2fs: flush inode if atomic file is aborted

Let's flush the inode being aborted atomic operation to avoid stale dirty inode during eviction in this call stack:

This fixes the syzbot report:

Detalles técnicos trazas, registros y código del informe original
  f2fs_mark_inode_dirty_sync+0x22/0x40 [f2fs]
  f2fs_abort_atomic_write+0xc4/0xf0 [f2fs]
  f2fs_evict_inode+0x3f/0x690 [f2fs]
  ? sugov_start+0x140/0x140
  evict+0xc3/0x1c0
  evict_inodes+0x17b/0x210
  generic_shutdown_super+0x32/0x120
  kill_block_super+0x21/0x50
  deactivate_locked_super+0x31/0x90
  cleanup_mnt+0x100/0x160
  task_work_run+0x59/0x90
  do_exit+0x33b/0xa50
  do_group_exit+0x2d/0x80
  __x64_sys_exit_group+0x14/0x20
  do_syscall_64+0x3b/0x90
  entry_SYSCALL_64_after_hwframe+0x63/0xcd

This triggers f2fs_bug_on() in f2fs_evict_inode:
 f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));

loop0: detected capacity change from 0 to 131072
F2FS-fs (loop0): invalid crc value
F2FS-fs (loop0): Found nat_bits in checkpoint
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4
------------[ cut here ]------------
kernel BUG at fs/f2fs/inode.c:869!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5014 Comm: syz-executor220 Not tainted 6.4.0-syzkaller-11479-g6cd06ab12d1a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:f2fs_evict_inode+0x172d/0x1e00 fs/f2fs/inode.c:869
Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 06 00 00 8b 75 40 ba 01 00 00 00 4c 89 e7 e8 6d ce 06 00 e9 aa fc ff ff e8 63 22 e2 fd <0f> 0b e8 5c 22 e2 fd 48 c7 c0 a8 3a 18 8d 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90003a6fa00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff8880273b8000 RSI: ffffffff83a2bd0d RDI: 0000000000000007
RBP: ffff888077db91b0 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888029a3c000
R13: ffff888077db9660 R14: ffff888029a3c0b8 R15: ffff888077db9c50
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1909bb9000 CR3: 00000000276a9000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 evict+0x2ed/0x6b0 fs/inode.c:665
 dispose_list+0x117/0x1e0 fs/inode.c:698
 evict_inodes+0x345/0x440 fs/inode.c:748
 generic_shutdown_super+0xaf/0x480 fs/super.c:478
 kill_block_super+0x64/0xb0 fs/super.c:1417
 kill_f2fs_super+0x2af/0x3c0 fs/f2fs/super.c:4704
 deactivate_locked_super+0x98/0x160 fs/super.c:330
 deactivate_super+0xb1/0xd0 fs/super.c:361
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1254
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa9a/0x29a0 kernel/exit.c:874
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f309be71a09
Code: Unable to access opcode bytes at 0x7f309be719df.
RSP: 002b:00007fff171df518 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f309bef7330 RCX: 00007f309be71a09
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f309bef1e40
R10: 0000000000010600 R11: 0000000000000246 R12: 00007f309bef7330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_evict_inode+0x172d/0x1e00 fs/f2fs/inode.c:869
Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 06 00 00 8b 75 40 ba 01 00 00 00 4c 89 e7 e8 6d ce 06 00 e9 aa fc ff ff e8 63 22 e2 fd <0f> 0b e8 5c 22 e2 fd 48 c7 c0 a8 3a 18 8d 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90003a6fa00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000
---truncated---

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Acceso local (AV:L/PR:L) sin interacción: T1068. El bug en f2fs_evict_inode causa kernel panic (DoS) y corrupción de datos al abortar operaciones atómicas en el sistema de ficheros F2FS.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-53829",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
              "lessThan": "1c64dbe8fa3552a340bca6d7fa09468c16ed2a85",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
              "lessThan": "bfa7853bb47fee0c17030b377c98cf4ede47ba33",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
              "lessThan": "a3ab55746612247ce3dcaac6de66f5ffc055b9df",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/f2fs/segment.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.8",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.54",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.5.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.5.*"
            },
            {
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/f2fs/segment.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-09T16:17:21.790",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1c64dbe8fa3552a340bca6d7fa09468c16ed2a85",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a3ab55746612247ce3dcaac6de66f5ffc055b9df",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bfa7853bb47fee0c17030b377c98cf4ede47ba33",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: flush inode if atomic file is aborted\n\nLet's flush the inode being aborted atomic operation to avoid stale dirty\ninode during eviction in this call stack:\n\n  f2fs_mark_inode_dirty_sync+0x22/0x40 [f2fs]\n  f2fs_abort_atomic_write+0xc4/0xf0 [f2fs]\n  f2fs_evict_inode+0x3f/0x690 [f2fs]\n  ? sugov_start+0x140/0x140\n  evict+0xc3/0x1c0\n  evict_inodes+0x17b/0x210\n  generic_shutdown_super+0x32/0x120\n  kill_block_super+0x21/0x50\n  deactivate_locked_super+0x31/0x90\n  cleanup_mnt+0x100/0x160\n  task_work_run+0x59/0x90\n  do_exit+0x33b/0xa50\n  do_group_exit+0x2d/0x80\n  __x64_sys_exit_group+0x14/0x20\n  do_syscall_64+0x3b/0x90\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThis triggers f2fs_bug_on() in f2fs_evict_inode:\n f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));\n\nThis fixes the syzbot report:\n\nloop0: detected capacity change from 0 to 131072\nF2FS-fs (loop0): invalid crc value\nF2FS-fs (loop0): Found nat_bits in checkpoint\nF2FS-fs (loop0): Mounted with checkpoint version = 48b305e4\n------------[ cut here ]------------\nkernel BUG at fs/f2fs/inode.c:869!\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN\nCPU: 0 PID: 5014 Comm: syz-executor220 Not tainted 6.4.0-syzkaller-11479-g6cd06ab12d1a #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023\nRIP: 0010:f2fs_evict_inode+0x172d/0x1e00 fs/f2fs/inode.c:869\nCode: ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 06 00 00 8b 75 40 ba 01 00 00 00 4c 89 e7 e8 6d ce 06 00 e9 aa fc ff ff e8 63 22 e2 fd <0f> 0b e8 5c 22 e2 fd 48 c7 c0 a8 3a 18 8d 48 ba 00 00 00 00 00 fc\nRSP: 0018:ffffc90003a6fa00 EFLAGS: 00010293\nRAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000\nRDX: ffff8880273b8000 RSI: ffffffff83a2bd0d RDI: 0000000000000007\nRBP: ffff888077db91b0 R08: 0000000000000007 R09: 0000000000000000\nR10: 0000000000000001 R11: 0000000000000001 R12: ffff888029a3c000\nR13: ffff888077db9660 R14: ffff888029a3c0b8 R15: ffff888077db9c50\nFS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f1909bb9000 CR3: 00000000276a9000 CR4: 0000000000350ef0\nCall Trace:\n <TASK>\n evict+0x2ed/0x6b0 fs/inode.c:665\n dispose_list+0x117/0x1e0 fs/inode.c:698\n evict_inodes+0x345/0x440 fs/inode.c:748\n generic_shutdown_super+0xaf/0x480 fs/super.c:478\n kill_block_super+0x64/0xb0 fs/super.c:1417\n kill_f2fs_super+0x2af/0x3c0 fs/f2fs/super.c:4704\n deactivate_locked_super+0x98/0x160 fs/super.c:330\n deactivate_super+0xb1/0xd0 fs/super.c:361\n cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1254\n task_work_run+0x16f/0x270 kernel/task_work.c:179\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0xa9a/0x29a0 kernel/exit.c:874\n do_group_exit+0xd4/0x2a0 kernel/exit.c:1024\n __do_sys_exit_group kernel/exit.c:1035 [inline]\n __se_sys_exit_group kernel/exit.c:1033 [inline]\n __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1033\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7f309be71a09\nCode: Unable to access opcode bytes at 0x7f309be719df.\nRSP: 002b:00007fff171df518 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\nRAX: ffffffffffffffda RBX: 00007f309bef7330 RCX: 00007f309be71a09\nRDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001\nRBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f309bef1e40\nR10: 0000000000010600 R11: 0000000000000246 R12: 00007f309bef7330\nR13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001\n </TASK>\nModules linked in:\n---[ end trace 0000000000000000 ]---\nRIP: 0010:f2fs_evict_inode+0x172d/0x1e00 fs/f2fs/inode.c:869\nCode: ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 06 00 00 8b 75 40 ba 01 00 00 00 4c 89 e7 e8 6d ce 06 00 e9 aa fc ff ff e8 63 22 e2 fd <0f> 0b e8 5c 22 e2 fd 48 c7 c0 a8 3a 18 8d 48 ba 00 00 00 00 00 fc\nRSP: 0018:ffffc90003a6fa00 EFLAGS: 00010293\nRAX: 0000000000000000 RBX: 0000000000\n---truncated---"
    }
  ],
  "lastModified": "2026-08-04T10:19:23.433",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}