243 lines
14 KiB
JSON
243 lines
14 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-31716",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-03-09T15:48:24.133Z",
|
|
"datePublished": "2026-05-01T13:56:11.263Z",
|
|
"dateUpdated": "2026-08-05T12:24:47.538Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:24:47.538Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate rec->used in journal-replay file record check\n\ncheck_file_record() validates rec->total against the record size but\nnever validates rec->used. The do_action() journal-replay handlers read\nrec->used from disk and use it to compute memmove lengths:\n\n DeleteAttribute: memmove(attr, ..., used - asize - roff)\n CreateAttribute: memmove(..., attr, used - roff)\n change_attr_size: memmove(..., used - PtrOffset(rec, next))\n\nWhen rec->used is smaller than the offset of a validated attribute, or\nlarger than the record size, these subtractions can underflow allowing\nus to copy huge amounts of memory in to a 4kb buffer, generally\nconsidered a bad idea overall.\n\nThis requires a corrupted filesystem, which isn't a threat model the\nkernel really needs to worry about, but checking for such an obvious\nout-of-bounds value is good to keep things robust, especially on journal\nreplay\n\nFix this up by bounding rec->used correctly.\n\nThis is much like commit b2bc7c44ed17 (\"fs/ntfs3: Fix slab-out-of-bounds\nread in DeleteIndexEntryRoot\") which checked different values in this\nsame switch statement."
|
|
}
|
|
],
|
|
"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 vulnerable ntfs3 journal replay code is reached when the target mounts or otherwise processes a crafted NTFS block device/image, which is a local filesystem parsing path rather than a network protocol. Physical removable media is one delivery route, but local image/block-device mounting is also reasonable.\nAC:L - The attacker controls the corrupt NTFS metadata and journal records, including the `rec->used` value and replay operation needed to trigger the underflowed `memmove()` length. No race or external timing condition is required.\nPR:N - Direct self-triggered mounting is gated by `CAP_SYS_ADMIN` and ntfs3 is not user-namespace mountable, but the highest reasonable scenario is an attacker-supplied NTFS image/media mounted by a victim or automounter. In that scenario the attacker needs no privileges on the target.\nUI:R - Exploitation requires the target system or user to mount/process the crafted NTFS filesystem so journal replay runs. The attacker cannot reach this ntfs3 path solely by sending packets.\nS:U - The impact remains within the same kernel security authority. This is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:H - The bug creates out-of-bounds memory movement from attacker-controlled on-disk metadata into a small MFT record buffer, and the resulting kernel memory corruption/read exposure is not tightly bounded. When uncertain, the higher impact is appropriate.\nI:H - The underflowed `memmove()` length can overflow/corrupt kernel heap memory adjacent to the MFT record buffer. Such out-of-bounds write-style memory corruption is potentially exploitable for arbitrary modification or code execution.\nA:H - The same oversized `memmove()` can cause kernel heap corruption, faults, oopses, or panics during mount-time journal replay. This is a 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/ntfs3/fslog.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
|
|
"lessThan": "8e64d33198b5a0fb14a452708bad844f94f03b2c",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
|
|
"lessThan": "1393a467a9607e62123806de7d4c3a3e54e396a9",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
|
|
"lessThan": "f90b8a1798b750755a9e9aee66678f0a1820bbaf",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
|
|
"lessThan": "4b1613d7e2deda831a97e427d1ea586e50fe1be5",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
|
|
"lessThan": "0112e6279420d4005b3d57af36fb45c01b8d0116",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
|
|
"lessThan": "f79d0403ea20a81bc29105bba54fbcab54e8c403",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
|
|
"lessThan": "0ca0485e4b2e837ebb6cbd4f2451aba665a03e4b",
|
|
"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/ntfs3/fslog.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "5.15",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "5.15",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.209",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.175",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.136",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.84",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.25",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.0.2",
|
|
"lessThanOrEqual": "7.0.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.1",
|
|
"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": "5.15",
|
|
"versionEndExcluding": "5.15.209"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.15",
|
|
"versionEndExcluding": "6.1.175"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.15",
|
|
"versionEndExcluding": "6.6.136"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.15",
|
|
"versionEndExcluding": "6.12.84"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.15",
|
|
"versionEndExcluding": "6.18.25"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.15",
|
|
"versionEndExcluding": "7.0.2"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.15",
|
|
"versionEndExcluding": "7.1"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/8e64d33198b5a0fb14a452708bad844f94f03b2c"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/1393a467a9607e62123806de7d4c3a3e54e396a9"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f90b8a1798b750755a9e9aee66678f0a1820bbaf"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/4b1613d7e2deda831a97e427d1ea586e50fe1be5"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0112e6279420d4005b3d57af36fb45c01b8d0116"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f79d0403ea20a81bc29105bba54fbcab54e8c403"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0ca0485e4b2e837ebb6cbd4f2451aba665a03e4b"
|
|
}
|
|
],
|
|
"title": "fs/ntfs3: validate rec->used in journal-replay file record check",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |