CVE-2025-68295
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix memory leak in cifs_construct_tcon()
When having a multiuser mount with domain= specified and using cifscreds, cifs_set_cifscreds() will end up setting @ctx->domainname, so it needs to be freed before leaving cifs_construct_tcon().
This fixes the following memory leak reported by kmemleak:
Detalles técnicos trazas, registros y código del informe original
mount.cifs //srv/share /mnt -o domain=ZELDA,multiuser,...
su - testuser
cifscreds add -d ZELDA -u testuser
...
ls /mnt/1
...
umount /mnt
echo scan > /sys/kernel/debug/kmemleak
cat /sys/kernel/debug/kmemleak
unreferenced object 0xffff8881203c3f08 (size 8):
comm "ls", pid 5060, jiffies 4307222943
hex dump (first 8 bytes):
5a 45 4c 44 41 00 cc cc ZELDA...
backtrace (crc d109a8cf):
__kmalloc_node_track_caller_noprof+0x572/0x710
kstrdup+0x3a/0x70
cifs_sb_tlink+0x1209/0x1770 [cifs]
cifs_get_fattr+0xe1/0xf50 [cifs]
cifs_get_inode_info+0xb5/0x240 [cifs]
cifs_revalidate_dentry_attr+0x2d1/0x470 [cifs]
cifs_getattr+0x28e/0x450 [cifs]
vfs_getattr_nosec+0x126/0x180
vfs_statx+0xf6/0x220
do_statx+0xab/0x110
__x64_sys_statx+0xd5/0x130
do_syscall_64+0xbb/0x380
entry_SYSCALL_64_after_hwframe+0x77/0x7fCVSS
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: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- 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/3184b6a5a24ec9ee74087b2a550476f386df7dc2
- https://git.kernel.org/stable/c/3dd546e867e94c2f954bca45a961b6104ba708b6
- https://git.kernel.org/stable/c/a67e91d5f446e455dd9201cdd6e865f7078d251d
- https://git.kernel.org/stable/c/d146e96fef876492979658dce644305de35878d4
- https://git.kernel.org/stable/c/f15288c137d960836277d0e3ecc62de68e52f00f
- https://git.kernel.org/stable/c/f62ffdfb431bdfa4b6d24233b7fd830eca0b801e
- https://git.kernel.org/stable/c/ff8f9bd1c46ee02d5558293915d42e82646d5ee9
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-68295",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-68295",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-06-16T16:54:11.171368Z"
}
}
]
},
"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": "f2aee329a68f5a907bcff11a109dfe17c0b41aeb",
"lessThan": "ff8f9bd1c46ee02d5558293915d42e82646d5ee9",
"versionType": "git"
},
{
"status": "affected",
"version": "f2aee329a68f5a907bcff11a109dfe17c0b41aeb",
"lessThan": "d146e96fef876492979658dce644305de35878d4",
"versionType": "git"
},
{
"status": "affected",
"version": "f2aee329a68f5a907bcff11a109dfe17c0b41aeb",
"lessThan": "3dd546e867e94c2f954bca45a961b6104ba708b6",
"versionType": "git"
},
{
"status": "affected",
"version": "f2aee329a68f5a907bcff11a109dfe17c0b41aeb",
"lessThan": "f62ffdfb431bdfa4b6d24233b7fd830eca0b801e",
"versionType": "git"
},
{
"status": "affected",
"version": "f2aee329a68f5a907bcff11a109dfe17c0b41aeb",
"lessThan": "f15288c137d960836277d0e3ecc62de68e52f00f",
"versionType": "git"
},
{
"status": "affected",
"version": "f2aee329a68f5a907bcff11a109dfe17c0b41aeb",
"lessThan": "a67e91d5f446e455dd9201cdd6e865f7078d251d",
"versionType": "git"
},
{
"status": "affected",
"version": "f2aee329a68f5a907bcff11a109dfe17c0b41aeb",
"lessThan": "3184b6a5a24ec9ee74087b2a550476f386df7dc2",
"versionType": "git"
},
{
"status": "affected",
"version": "1456d3cea31114137fabf1110d20a2e2c6d6060f",
"versionType": "git"
},
{
"status": "affected",
"version": "16764d7486d02b1699ae16e91d7a577602398b17",
"versionType": "git"
},
{
"status": "affected",
"version": "904847402bd74a28164bd4d8da082d1eace7c190",
"versionType": "git"
},
{
"status": "affected",
"version": "325fa2a6729b74b2806b31725940cb54658515e5",
"versionType": "git"
},
{
"status": "affected",
"version": "8db988a982908b7bff76e095000adabf9c29698b",
"versionType": "git"
},
{
"status": "affected",
"version": "4.4.194",
"lessThan": "4.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.194",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.146",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.75",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.2.17",
"lessThan": "5.3",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/connect.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.247",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.197",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.119",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.61",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.11",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/connect.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-16T16:16:08.423",
"references": [
{
"url": "https://git.kernel.org/stable/c/3184b6a5a24ec9ee74087b2a550476f386df7dc2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3dd546e867e94c2f954bca45a961b6104ba708b6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a67e91d5f446e455dd9201cdd6e865f7078d251d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d146e96fef876492979658dce644305de35878d4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f15288c137d960836277d0e3ecc62de68e52f00f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f62ffdfb431bdfa4b6d24233b7fd830eca0b801e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ff8f9bd1c46ee02d5558293915d42e82646d5ee9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix memory leak in cifs_construct_tcon()\n\nWhen having a multiuser mount with domain= specified and using\ncifscreds, cifs_set_cifscreds() will end up setting @ctx->domainname,\nso it needs to be freed before leaving cifs_construct_tcon().\n\nThis fixes the following memory leak reported by kmemleak:\n\n mount.cifs //srv/share /mnt -o domain=ZELDA,multiuser,...\n su - testuser\n cifscreds add -d ZELDA -u testuser\n ...\n ls /mnt/1\n ...\n umount /mnt\n echo scan > /sys/kernel/debug/kmemleak\n cat /sys/kernel/debug/kmemleak\n unreferenced object 0xffff8881203c3f08 (size 8):\n comm \"ls\", pid 5060, jiffies 4307222943\n hex dump (first 8 bytes):\n 5a 45 4c 44 41 00 cc cc ZELDA...\n backtrace (crc d109a8cf):\n __kmalloc_node_track_caller_noprof+0x572/0x710\n kstrdup+0x3a/0x70\n cifs_sb_tlink+0x1209/0x1770 [cifs]\n cifs_get_fattr+0xe1/0xf50 [cifs]\n cifs_get_inode_info+0xb5/0x240 [cifs]\n cifs_revalidate_dentry_attr+0x2d1/0x470 [cifs]\n cifs_getattr+0x28e/0x450 [cifs]\n vfs_getattr_nosec+0x126/0x180\n vfs_statx+0xf6/0x220\n do_statx+0xab/0x110\n __x64_sys_statx+0xd5/0x130\n do_syscall_64+0xbb/0x380\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
}
],
"lastModified": "2026-06-17T09:58:53.287",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}