314 lines
17 KiB
JSON
314 lines
17 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2024-46780",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2024-09-11T15:12:18.276Z",
|
|
"datePublished": "2024-09-18T07:12:36.736Z",
|
|
"dateUpdated": "2026-08-05T11:38:31.009Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T11:38:31.009Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: protect references to superblock parameters exposed in sysfs\n\nThe superblock buffers of nilfs2 can not only be overwritten at runtime\nfor modifications/repairs, but they are also regularly swapped, replaced\nduring resizing, and even abandoned when degrading to one side due to\nbacking device issues. So, accessing them requires mutual exclusion using\nthe reader/writer semaphore \"nilfs->ns_sem\".\n\nSome sysfs attribute show methods read this superblock buffer without the\nnecessary mutual exclusion, which can cause problems with pointer\ndereferencing and memory access, so fix it."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
|
|
"baseScore": 7.8,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:L - The vulnerable code is reached by reading a sysfs attribute file under /sys/fs/nilfs2/<device>/, which requires local access to the system. There is no network-facing path into nilfs2's sysfs show methods.\nAC:L - The attacker fully controls the read side and can retry unboundedly by spamming reads of the world-readable attributes from many threads, while the mutating side (nilfs_swap_super_block via nilfs_prepare_super during segment construction) fires repeatedly on any active nilfs2 mount and can be forced with write+sync activity. Unbounded, cheap retry against a continuously recurring window makes this reliably winnable.\nPR:L - The affected attributes are created with NILFS_DEV_RO_ATTR, i.e. mode 0444, so any unprivileged local user can read them with no capability whatsoever. No CAP_SYS_ADMIN is needed on the reader side — only on the unrelated mount/resize side.\nUI:N - Once a nilfs2 volume is mounted (at boot, via fstab, or by an automounter such as udisks on a kiosk/desktop), the attacker triggers the bug entirely on their own by reading sysfs. No victim action is required at exploitation time.\nS:U - The race, the freed page-cache folio, and the resulting disclosure or crash are all within the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - When ns_sbp[0] has been released or replaced (nilfs_fall_back_super_block after an -EIO superblock write, or nilfs_move_2nd_super during resize), the show methods perform a use-after-free read of a freed bdev page-cache folio and copy those bytes verbatim to userspace via sysfs_emit/scnprintf — up to 80 bytes per read from volume_name, repeatable in a loop, yielding a kernel memory disclosure primitive over reallocated page contents.\nI:H - This is a use-after-free on a page-cache folio whose reuse the attacker can groom via page-spray, and per kernel UAF scoring practice such object-lifetime bugs are treated as leverageable for control over freed-and-reallocated kernel memory rather than as read-only. The unsynchronized pointer also lets the reader observe torn state (nilfs_dev_revision_show reloads sbp[0] twice across a swap), so kernel object state is consumed inconsistently.\nA:H - Dereferencing a superblock pointer that has been abandoned during degradation to one side, or that points into a released buffer_head's page, causes a kernel oops/panic — the commit explicitly cites \"problems with pointer dereferencing and memory access.\" Any such crash is High availability impact."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"fs/nilfs2/sysfs.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "b90beafac05931cbfcb6b1bd4f67c1923f47040e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "ba97ba173f9625d5f34a986088979eae8b80d38e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "157c0d94b4c40887329418c70ef4edd1a8d6b4ed",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "b14e7260bb691d7f563f61da07d61e3c8b59a614",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "19cfeba0e4b8eda51484fcf8cf7d150418e1d880",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "8c6e43b3d5f109cf9c61bc188fcc8175404e924f",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "962562d4c70c5cdeb4e955d63ff2017c4eca1aad",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "da7141fb78db915680616e15677539fc8140cf53",
|
|
"lessThan": "683408258917541bdb294cd717c210a04381931e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"fs/nilfs2/sysfs.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "3.17",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "3.17",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "4.19.322",
|
|
"lessThanOrEqual": "4.19.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.4.284",
|
|
"lessThanOrEqual": "5.4.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.226",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.167",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.110",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.51",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.10.10",
|
|
"lessThanOrEqual": "6.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.11",
|
|
"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": "3.17",
|
|
"versionEndExcluding": "4.19.322"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.17",
|
|
"versionEndExcluding": "5.4.284"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.17",
|
|
"versionEndExcluding": "5.10.226"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.17",
|
|
"versionEndExcluding": "5.15.167"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.17",
|
|
"versionEndExcluding": "6.1.110"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.17",
|
|
"versionEndExcluding": "6.6.51"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.17",
|
|
"versionEndExcluding": "6.10.10"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.17",
|
|
"versionEndExcluding": "6.11"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b90beafac05931cbfcb6b1bd4f67c1923f47040e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/ba97ba173f9625d5f34a986088979eae8b80d38e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/157c0d94b4c40887329418c70ef4edd1a8d6b4ed"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b14e7260bb691d7f563f61da07d61e3c8b59a614"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/19cfeba0e4b8eda51484fcf8cf7d150418e1d880"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/8c6e43b3d5f109cf9c61bc188fcc8175404e924f"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/962562d4c70c5cdeb4e955d63ff2017c4eca1aad"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/683408258917541bdb294cd717c210a04381931e"
|
|
}
|
|
],
|
|
"title": "nilfs2: protect references to superblock parameters exposed in sysfs",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2024-09-29T14:38:16.059134Z",
|
|
"id": "CVE-2024-46780",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2024-09-29T14:38:30.940Z"
|
|
}
|
|
},
|
|
{
|
|
"title": "CVE Program Container",
|
|
"references": [
|
|
{
|
|
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
|
|
},
|
|
{
|
|
"url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"
|
|
}
|
|
],
|
|
"providerMetadata": {
|
|
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
|
"shortName": "CVE",
|
|
"dateUpdated": "2025-11-03T22:18:20.810Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |