CVE-2025-68796
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid updating zero-sized extent in extent cache
As syzbot reported:
In error path of f2fs_zero_range(), it may add a zero-sized extent into extent cache, it should be avoided.
Detalles técnicos trazas, registros y código del informe original
F2FS-fs (loop0): __update_extent_tree_range: extent len is zero, type: 0, extent [0, 0, 0], age [0, 0] ------------[ cut here ]------------ kernel BUG at fs/f2fs/extent_cache.c:678! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__update_extent_tree_range+0x13bc/0x1500 fs/f2fs/extent_cache.c:678 Call Trace: <TASK> f2fs_update_read_extent_cache_range+0x192/0x3e0 fs/f2fs/extent_cache.c:1085 f2fs_do_zero_range fs/f2fs/file.c:1657 [inline] f2fs_zero_range+0x10c1/0x1580 fs/f2fs/file.c:1737 f2fs_fallocate+0x583/0x990 fs/f2fs/file.c:2030 vfs_fallocate+0x669/0x7e0 fs/open.c:342 ioctl_preallocate fs/ioctl.c:289 [inline] file_ioctl+0x611/0x780 fs/ioctl.c:-1 do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:576 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f07bc58eec9
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 6/10/2026
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).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/4f244c64efe628d277b916f47071adf480eb8646
- https://git.kernel.org/stable/c/72c58a82e6fb7b327e8701f5786c70c3edc56188
- https://git.kernel.org/stable/c/7c37c79510329cd951a4dedf3f7bf7e2b18dccec
- https://git.kernel.org/stable/c/9c07bd262c13ca922adad6e7613d48505f97f548
- https://git.kernel.org/stable/c/bac23833220a1f8fe8dfab7e16efa20ff64d7589
- https://git.kernel.org/stable/c/e50b81c50fcbe63f50405bb40f262162ff32af88
- https://git.kernel.org/stable/c/efe3371001f50a2d6f746b50bdc6f9f26b2089ec
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-68796",
"cveTags": [],
"metrics": {},
"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": "6e9619499f53b22ead972e476c0e8341c997d929",
"lessThan": "9c07bd262c13ca922adad6e7613d48505f97f548",
"versionType": "git"
},
{
"status": "affected",
"version": "6e9619499f53b22ead972e476c0e8341c997d929",
"lessThan": "72c58a82e6fb7b327e8701f5786c70c3edc56188",
"versionType": "git"
},
{
"status": "affected",
"version": "6e9619499f53b22ead972e476c0e8341c997d929",
"lessThan": "e50b81c50fcbe63f50405bb40f262162ff32af88",
"versionType": "git"
},
{
"status": "affected",
"version": "6e9619499f53b22ead972e476c0e8341c997d929",
"lessThan": "efe3371001f50a2d6f746b50bdc6f9f26b2089ec",
"versionType": "git"
},
{
"status": "affected",
"version": "6e9619499f53b22ead972e476c0e8341c997d929",
"lessThan": "4f244c64efe628d277b916f47071adf480eb8646",
"versionType": "git"
},
{
"status": "affected",
"version": "6e9619499f53b22ead972e476c0e8341c997d929",
"lessThan": "bac23833220a1f8fe8dfab7e16efa20ff64d7589",
"versionType": "git"
},
{
"status": "affected",
"version": "6e9619499f53b22ead972e476c0e8341c997d929",
"lessThan": "7c37c79510329cd951a4dedf3f7bf7e2b18dccec",
"versionType": "git"
}
],
"programFiles": [
"fs/f2fs/file.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.64",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.3",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/f2fs/file.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-01-13T16:16:01.540",
"references": [
{
"url": "https://git.kernel.org/stable/c/4f244c64efe628d277b916f47071adf480eb8646",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/72c58a82e6fb7b327e8701f5786c70c3edc56188",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7c37c79510329cd951a4dedf3f7bf7e2b18dccec",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9c07bd262c13ca922adad6e7613d48505f97f548",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bac23833220a1f8fe8dfab7e16efa20ff64d7589",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e50b81c50fcbe63f50405bb40f262162ff32af88",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/efe3371001f50a2d6f746b50bdc6f9f26b2089ec",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid updating zero-sized extent in extent cache\n\nAs syzbot reported:\n\nF2FS-fs (loop0): __update_extent_tree_range: extent len is zero, type: 0, extent [0, 0, 0], age [0, 0]\n------------[ cut here ]------------\nkernel BUG at fs/f2fs/extent_cache.c:678!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nRIP: 0010:__update_extent_tree_range+0x13bc/0x1500 fs/f2fs/extent_cache.c:678\nCall Trace:\n <TASK>\n f2fs_update_read_extent_cache_range+0x192/0x3e0 fs/f2fs/extent_cache.c:1085\n f2fs_do_zero_range fs/f2fs/file.c:1657 [inline]\n f2fs_zero_range+0x10c1/0x1580 fs/f2fs/file.c:1737\n f2fs_fallocate+0x583/0x990 fs/f2fs/file.c:2030\n vfs_fallocate+0x669/0x7e0 fs/open.c:342\n ioctl_preallocate fs/ioctl.c:289 [inline]\n file_ioctl+0x611/0x780 fs/ioctl.c:-1\n do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:576\n __do_sys_ioctl fs/ioctl.c:595 [inline]\n __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f07bc58eec9\n\nIn error path of f2fs_zero_range(), it may add a zero-sized extent\ninto extent cache, it should be avoided."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nf2fs: corrección para evitar actualizar una extensión de tamaño cero en la caché de extensiones\n\nComo informó syzbot:\n\nF2FS-fs (loop0): __update_extent_tree_range: la longitud de la extensión es cero, tipo: 0, extensión [0, 0, 0], antigüedad [0, 0]\n------------[ cut here ]------------\nBUG del kernel en fs/f2fs/extent_cache.c:678!\nOops: código de operación inválido: 0000 [#1] SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 No contaminado syzkaller #0 PREEMPT(full)\nNombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nRIP: 0010:__update_extent_tree_range+0x13bc/0x1500 fs/f2fs/extent_cache.c:678\nTraza de la llamada:\n \n f2fs_update_read_extent_cache_range+0x192/0x3e0 fs/f2fs/extent_cache.c:1085\n f2fs_do_zero_range fs/f2fs/file.c:1657 [inline]\n f2fs_zero_range+0x10c1/0x1580 fs/f2fs/file.c:1737\n f2fs_fallocate+0x583/0x990 fs/f2fs/file.c:2030\n vfs_fallocate+0x669/0x7e0 fs/open.c:342\n ioctl_preallocate fs/ioctl.c:289 [inline]\n file_ioctl+0x611/0x780 fs/ioctl.c:-1\n do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:576\n __do_sys_ioctl fs/ioctl.c:595 [inline]\n __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f07bc58eec9\n\nEn la ruta de error de f2fs_zero_range(), puede añadir una extensión de tamaño cero en la caché de extensiones, lo cual debe evitarse."
}
],
"lastModified": "2026-06-17T09:59:36.160",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}