ksmbd: zero pipe read compound padding
In the Linux kernel, the following vulnerability has been resolved: ksmbd: zero pipe read compound padding Compound response handling extends the last response iov to an eight-byte boundary. smb2_read_pipe() allocates only the payload size, so the alignment padding can expose up to seven bytes of uninitialized kernel heap memory. Allocate the aligned size and clear the unused tail before pinning the response buffer.
CVE-2026-89794
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-2026-89794
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": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
"lessThan": "134d980491b435e5cdb3171225e2506ff17867d1",
"versionType": "git"
},
{
"status": "affected",
"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
"lessThan": "f188a400dd5285fec5a84548fe8dca49eee01155",
"versionType": "git"
},
{
"status": "affected",
"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
"lessThan": "d83a9de7cecd401c3d3e00ed6371194dcd7313e4",
"versionType": "git"
},
{
"status": "affected",
"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
"lessThan": "be15b8da4a82cf1e1f9880b2661b90770606eec1",
"versionType": "git"
},
{
"status": "affected",
"version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
"lessThan": "73f860489e3be2245598d1819226304fc5b87291",
"versionType": "git"
},
{
"status": "affected",
"version": "f2283680a80571ca82d710bc6ecd8f8beac67d63",
"versionType": "git"
},
{
"status": "affected",
"version": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.145",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.71",
"lessThan": "6.2",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/server/smb2pdu.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/server/smb2pdu.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89794
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46726 · Revision 1
- Added to Heist Feed
- Publisher date