ntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()
In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e() The bounds check in ntfs_dir_emit() compares fname->name_len (a character count) against e->size (a byte count) without accounting for the 2-byte-per-character UTF-16LE encoding or the ATTR_FILE_NAME header size: if (fname->name_len + sizeof(struct NTFS_DE) > le16_to_cpu(e->size)) This computes: name_len + 16 > e_size The correct check must account for the ATTR_FILE_NAME header (66 bytes before the name) and the UTF-16LE character size (2 bytes each): sizeof(NTFS_DE) + offsetof(ATTR_FILE_NAME, name) + name_len * sizeof(short) > e_size Which computes: 16 + 66 + name_len * 2 > e_size The correct calculation already exists as fname_full_size() in ntfs.h and is used in cmp_fnames(), namei.c, and fslog.c, but was not used in the readdir path. A crafted NTFS image with an index entry containing a small e->size but large fname->name_len bypasses the current check, causing ntfs_utf16_to_nls() to read past the entry boundary. Additionally, add a key_size validation in hdr_find_e() to ensure the declared key_size does not exceed the available entry data, preventing comparison functions from reading past entry boundaries on the lookup path.
CVE-2026-97437
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-2026-97437
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": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "d1f98938e437732c0ecdfc8ee451e12a072f6d07",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "0505f1e7bb5b981b6ed62d98b26ddce76142865d",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "2f7d0ec8c10dc7bf7a8c9a9cb169f9a4d1fac2ba",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "ed6da1abeec50db9060d714f03743fe0b63e4fe4",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "6a8149a20e46086c756c2a9202e377c0b649a0c3",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "aa1bdbb39f49c5bc9779316891c40005517842a5",
"versionType": "git"
}
],
"programFiles": [
"fs/ntfs3/dir.c",
"fs/ntfs3/index.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ntfs3/dir.c",
"fs/ntfs3/index.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97437
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #8322 · Revision 1
- Added to Heist Feed
- Publisher date