VULN/vuln-cve
1
0 Fork 0
Code Pull Requests Actions Activity
Files
c1444140e59c61ba154436ea0cd6284d8a97c3f0
vuln-cve/data/2024/49xxx/CVE-2024-49960.json
T

331 lines
17 KiB
JSON
Raw Blame History

{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2024-49960",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-10-21T12:17:06.049Z",
"datePublished": "2024-10-21T18:02:13.119Z",
"dateUpdated": "2026-08-05T11:40:42.935Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T11:40:42.935Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix timer use-after-free on failed mount\n\nSyzbot has found an ODEBUG bug in ext4_fill_super\n\nThe del_timer_sync function cancels the s_err_report timer,\nwhich reminds about filesystem errors daily. We should\nguarantee the timer is no longer active before kfree(sbi).\n\nWhen filesystem mounting fails, the flow goes to failed_mount3,\nwhere an error occurs when ext4_stop_mmpd is called, causing\na read I/O failure. This triggers the ext4_handle_error function\nthat ultimately re-arms the timer,\nleaving the s_err_report timer active before kfree(sbi) is called.\n\nFix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is triggered by mounting a crafted ext4 image via the mount(2)/fsconfig(2) syscall path, which requires local system access to the block device or image file. There is no remote or network-facing entry point into `ext4_fill_super()`.\nAC:L - The attacker fully controls the crafted image: enabling the MMP feature starts kmmpd, and planting a later-stage mount failure plus an unreadable/corrupt MMP block deterministically drives `ext4_stop_mmpd()` → `ext4_error_err()` → `mod_timer()` after the timer was already cancelled. syzbot reproduced it reliably; no race or uncontrolled memory-layout condition is involved.\nPR:N - The attacker supplies only a malicious filesystem image or removable device and needs no account on the target; the privileged mount is performed by the victim or by an automounter (udisks2/autofs) acting on their behalf.\nUI:R - Because ext4 is not FS_USERNS_MOUNT, someone with CAP_SYS_ADMIN (or a desktop automount daemon reacting to inserted media) must actually mount the attacker-supplied image for the failed-mount cleanup path to run.\nS:U - The freed `ext4_sb_info` and the stale timer both live in the kernel's own security authority; exploitation yields kernel-level compromise but does not cross a hypervisor, IOMMU, or sandbox boundary.\nC:H - The armed `s_err_report` timer_list points into freed slab memory, so reallocating that object gives the attacker a use-after-free with control over the freed contents, which is leverageable into arbitrary kernel memory disclosure.\nI:H - The stale timer wheel entry is both an hlist_node and a `->function` pointer read out of attacker-reallocatable memory, giving list-corruption write and control-flow-hijack primitives executed from softirq context.\nA:H - The use-after-free reliably produces an ODEBUG/KASAN splat and, in production kernels, timer-wheel corruption leading to an oops or panic when the freed object is reused or the timer expires."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/ext4/super.c"
],
"versions": [
{
"version": "5e4f5138bd8522ebe231a137682d3857209a2c07",
"lessThan": "7aac0c17a8cdf4a3236991c1e60435c6a984076c",
"status": "affected",
"versionType": "git"
},
{
"version": "618f003199c6188e01472b03cdbba227f1dc5f24",
"lessThan": "22e9b83f0f33bc5a7a3181769d1dccbf021f5b04",
"status": "affected",
"versionType": "git"
},
{
"version": "618f003199c6188e01472b03cdbba227f1dc5f24",
"lessThan": "cf3196e5e2f36cd80dab91ffae402e13935724bc",
"status": "affected",
"versionType": "git"
},
{
"version": "618f003199c6188e01472b03cdbba227f1dc5f24",
"lessThan": "9203817ba46ebba7c865c8de2aba399537b6e891",
"status": "affected",
"versionType": "git"
},
{
"version": "618f003199c6188e01472b03cdbba227f1dc5f24",
"lessThan": "fa78fb51d396f4f2f80f8e96a3b1516f394258be",
"status": "affected",
"versionType": "git"
},
{
"version": "618f003199c6188e01472b03cdbba227f1dc5f24",
"lessThan": "b85569585d0154d4db1e4f9e3e6a4731d407feb0",
"status": "affected",
"versionType": "git"
},
{
"version": "618f003199c6188e01472b03cdbba227f1dc5f24",
"lessThan": "0ce160c5bdb67081a62293028dc85758a8efb22a",
"status": "affected",
"versionType": "git"
},
{
"version": "cecfdb9cf9a700d1037066173abac0617f6788df",
"status": "affected",
"versionType": "git"
},
{
"version": "eb7b40d9d3785f7a131fb0b1f89bb6efa46c1833",
"status": "affected",
"versionType": "git"
},
{
"version": "5.10.51",
"lessThan": "5.10.237",
"status": "affected",
"versionType": "semver"
},
{
"version": "5.12.18",
"lessThan": "5.13",
"status": "affected",
"versionType": "semver"
},
{
"version": "5.13.3",
"lessThan": "5.14",
"status": "affected",
"versionType": "semver"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/ext4/super.c"
],
"versions": [
{
"version": "5.14",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.14",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.237",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.181",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.118",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.55",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.10.14",
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.11.3",
"lessThanOrEqual": "6.11.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10.51",
"versionEndExcluding": "5.10.237"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "5.15.181"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.1.118"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.6.55"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.10.14"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.11.3"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.14",
"versionEndExcluding": "6.12"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.12.18"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.13.3"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/7aac0c17a8cdf4a3236991c1e60435c6a984076c"
},
{
"url": "https://git.kernel.org/stable/c/22e9b83f0f33bc5a7a3181769d1dccbf021f5b04"
},
{
"url": "https://git.kernel.org/stable/c/cf3196e5e2f36cd80dab91ffae402e13935724bc"
},
{
"url": "https://git.kernel.org/stable/c/9203817ba46ebba7c865c8de2aba399537b6e891"
},
{
"url": "https://git.kernel.org/stable/c/fa78fb51d396f4f2f80f8e96a3b1516f394258be"
},
{
"url": "https://git.kernel.org/stable/c/b85569585d0154d4db1e4f9e3e6a4731d407feb0"
},
{
"url": "https://git.kernel.org/stable/c/0ce160c5bdb67081a62293028dc85758a8efb22a"
}
],
"title": "ext4: fix timer use-after-free on failed mount",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2024-49960",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2024-10-22T13:35:13.994206Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2024-10-22T13:38:47.803Z"
}
},
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T22:23:41.082Z"
}
}
]
}
}
View Git Blame Copy Permalink