fs/ntfs3: add bounds check to run_get_highest_vcn()
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: add bounds check to run_get_highest_vcn() run_get_highest_vcn() parses a packed NTFS mapping-pairs buffer without any length bound, relying solely on a 0x00 terminator to stop. A crafted $LogFile UpdateMappingPairs record whose embedded attribute contains mapping-pairs runs without a terminator causes the function to read past the slab allocation, triggering a KASAN slab-out-of-bounds read on mount. The sibling function run_unpack() received an analogous bounds-check in commit b62567bca474 ("ntfs3: add buffer boundary checks to run_unpack()"), but run_get_highest_vcn() was missed. Take a run_buf_size parameter and reject any run header whose payload would extend past the buffer end, mirroring the pattern used by run_unpack(). The caller in fslog.c passes the remaining attribute bytes after the mapping-pairs offset. KASAN report (on mainline v7.1 merge window HEAD): BUG: KASAN: slab-out-of-bounds in run_get_highest_vcn+0x3c0/0x410 Read of size 1 at addr ffff88800e2d5400 by task mount/72 Call Trace: run_get_highest_vcn+0x3c0/0x410 do_action.isra.0+0x3ba8/0x7b50 log_replay+0x9ddd/0x10200 ntfs_loadlog_and_replay+0x4ad/0x610 ntfs_fill_super+0x214a/0x4540
CVE-2026-72478
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-72478
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "425de2aba0d061b3e715d51a3b1992c112ed5b99",
"lessThan": "c69b9003332917b652175d5fa9d84158c5ed8617",
"versionType": "git"
},
{
"status": "affected",
"version": "bf7ac4a1d3bfc6e56e54635c3d331a68170d37c9",
"lessThan": "8afc24a884aff6a6f08028bd779ee65c40054455",
"versionType": "git"
},
{
"status": "affected",
"version": "e64f7dfcaff79e7dfff9121a382dd77f9b462f62",
"lessThan": "c23083b472a720c3f60b147db05b25b751c7c1bf",
"versionType": "git"
},
{
"status": "affected",
"version": "d3012690a7065d9ca86521a525ad11e8af491d45",
"lessThan": "a31893206588374d7d16fad387189d8165c7efd3",
"versionType": "git"
},
{
"status": "affected",
"version": "b62567bca47408e6739dee75f02a2113548af875",
"lessThan": "41081202eb823f5b27ff164b12010b24428100ad",
"versionType": "git"
},
{
"status": "affected",
"version": "b62567bca47408e6739dee75f02a2113548af875",
"lessThan": "bb11485a87fbb2254b62cfed630b699d50e57da8",
"versionType": "git"
},
{
"status": "affected",
"version": "bbad75336870b51b81979b97613746237fcb02fe",
"versionType": "git"
},
{
"status": "affected",
"version": "41aadf5cb482793a24e05aa136224e179a778586",
"versionType": "git"
},
{
"status": "affected",
"version": "6.1.175",
"lessThan": "6.1.178",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.140",
"lessThan": "6.6.145",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.86",
"lessThan": "6.12.97",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.27",
"lessThan": "6.18.40",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.209",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.0.4",
"lessThan": "7.1",
"versionType": "semver"
}
],
"programFiles": [
"fs/ntfs3/fslog.c",
"fs/ntfs3/ntfs_fs.h",
"fs/ntfs3/run.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ntfs3/fslog.c",
"fs/ntfs3/ntfs_fs.h",
"fs/ntfs3/run.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72478
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33063 · Revision 1
- Added to Heist Feed
- Publisher date