smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush() smbd_send_batch_flush() already calls smbd_free_send_io(), so we should not call it again after smbd_post_send() moved it to the batch list.
CVE-2026-31609
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-2026-31609
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": "cca0526ef2344cab6944d7f441fc24e152da031b",
"lessThan": "a9940dcbe5cb92482c04efc7341039ddf7dbf607",
"versionType": "git"
},
{
"status": "affected",
"version": "37b5c06956183b65e6808b509cf637632016cdf7",
"lessThan": "22b7c1c619d808aec4cad3dc42103345e370d107",
"versionType": "git"
},
{
"status": "affected",
"version": "21538121efe6c8c5b51c742fa02cbe820bc48714",
"lessThan": "f9a162c2bbcd0ac85bd07c5b37cf20286048b65c",
"versionType": "git"
},
{
"status": "affected",
"version": "21538121efe6c8c5b51c742fa02cbe820bc48714",
"lessThan": "27b7c3e916218b5eb2ee350211140e961bfc49be",
"versionType": "git"
},
{
"status": "affected",
"version": "6.18.11",
"lessThan": "6.18.24",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.19.1",
"lessThan": "6.19.14",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/smbdirect.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.24",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0.1",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smbdirect.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31609
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #39930 · Revision 1
- Added to Heist Feed
- Publisher date