smb: client: fix double-free in SMB2_close() replay
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_close() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_close_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
CVE-2026-64597
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-2026-64597
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": "433042a91f9373241307725b52de573933ffedbf",
"lessThan": "037511726228aaf165c7067ff2bfc88eaecdf1f3",
"versionType": "git"
},
{
"status": "affected",
"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e",
"lessThan": "0aa97edf7c347c0f54e7e60c4740574b8120c66a",
"versionType": "git"
},
{
"status": "affected",
"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e",
"lessThan": "d15d83125007f673aec4323e1bbbaaffbe87ea13",
"versionType": "git"
},
{
"status": "affected",
"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e",
"lessThan": "b18ed621dbfceecea5539848cddcb9272c9a61e1",
"versionType": "git"
},
{
"status": "affected",
"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e",
"lessThan": "f96e1cdcb63ed3321142ff2fcdf784e32cda8fee",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.32",
"lessThan": "6.6.145",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/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": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smb2pdu.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64597
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #41101 · Revision 1
- Added to Heist Feed
- Publisher date