fs/ntfs3: bound page_lcns[] index by the log record
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound page_lcns[] index by the log record The copy_lcns loop and the redo shorten loop index page_lcns[] at j + i, where i runs up to the log record's lcns_follow. That count is checked only against the record's own length, not the target entry, so check_dp_table() (which validates the entry's lcns_follow) does not cover it: the copy_lcns entry may even be freshly allocated after that check, and find_dp() bounds j but not i. A crafted record thus overflows page_lcns[] of an otherwise valid entry. Add dp_range_ok() and reject, before each loop, any record whose run does not fit the entry. These are the only two page_lcns[] accesses indexed by the record rather than the entry, so together with the entry validation every access is now bounded. [almaz.alexandrovich@paragon-software.com: original patch contained changes to the problem already handled, applied partly]
CVE-2026-89615
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-2026-89615
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": "b46acd6a6a627d876898e1c84d3f84902264b445",
"lessThan": "31fdd11f75da9823500168cecb07aa45130915a3",
"versionType": "git"
},
{
"status": "affected",
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
"lessThan": "bb742d1030864c0fe140666f639428ba4e90b2ca",
"versionType": "git"
},
{
"status": "affected",
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
"lessThan": "61ca8cbbf68f77f25b699ed4358bd232f94ed43b",
"versionType": "git"
},
{
"status": "affected",
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
"lessThan": "f4c1bc6d7331f344ffcea93c2a37badcbe15baa6",
"versionType": "git"
},
{
"status": "affected",
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
"lessThan": "7ccb94901f38a062034b56b43c774050b113758f",
"versionType": "git"
},
{
"status": "affected",
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
"lessThan": "1135ebc225996b3ac1a295652b19a0a706737a6c",
"versionType": "git"
},
{
"status": "affected",
"version": "b46acd6a6a627d876898e1c84d3f84902264b445",
"lessThan": "6f7b9dbdc1b7520206abce0049bdd143eb536e75",
"versionType": "git"
}
],
"programFiles": [
"fs/ntfs3/fslog.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": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ntfs3/fslog.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89615
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #35122 · Revision 1
- Added to Heist Feed
- Publisher date