fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame() ni_read_frame() decompresses an LZNT $DATA frame into the vmapped target pages and then trusts decompress_lznt()'s return value: unc_size = decompress_lznt(frame_ondisk, ondisk_size, frame_mem, frame_size); if ((ssize_t)unc_size < 0) err = unc_size; else if (!unc_size || unc_size > frame_size) err = -EINVAL; decompress_lznt() stops as soon as the compressed stream is exhausted (e.g. a zero chunk header) and returns the number of bytes it actually wrote, which may be far less than frame_size. The bytes between unc_size and frame_size are never written. The only memset() that follows zeroes the region beyond i_valid; when the frame lies entirely within the file's valid size that memset() does not run, so the gap retains whatever was in the just-vmapped pages. All pages are then marked uptodate and returned to userspace, disclosing uninitialized (recently-freed) kernel page memory. A crafted compressed file whose stream decompresses to only a few bytes leaks the remainder of every frame on a plain read(2), which is enough to recover kernel pointers and defeat KASLR. Zero the [unc_size, frame_size) tail immediately after a successful LZNT decompress so the remainder reads back as zero.
CVE-2026-89616
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-2026-89616
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": "7d60a4c49af4d5cb88aa7cbf998d0408bd415055",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "cd40eee4923d104ebec9ac7513b971bc441e431d",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "77d8efd04745cda23858546afdbd9d07b591758e",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "376ee45659a4b943df672ad275c63da00655f929",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "4a1b39b2e10eb8de86265e80cf2be4396bc1dce4",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd",
"versionType": "git"
}
],
"programFiles": [
"fs/ntfs3/frecord.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/frecord.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89616
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #35123 · Revision 1
- Added to Heist Feed
- Publisher date