crypto: af_alg - Set merge to zero early in af_alg_sendmsg
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Set merge to zero early in af_alg_sendmsg If an error causes af_alg_sendmsg to abort, ctx->merge may contain a garbage value from the previous loop. This may then trigger a crash on the next entry into af_alg_sendmsg when it attempts to do a merge that can't be done. Fix this by setting ctx->merge to zero near the start of the loop.
CVE-2025-39931
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-2025-39931
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": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
"lessThan": "28f6f37abca7c5c9eb3959c66310f1d4d98b8aaf",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
"lessThan": "db2b42425dfbde4983b0c20fb7cfa05f70e6a745",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
"lessThan": "6241b9e2809b12da9130894cf5beddf088dc1b8a",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
"lessThan": "2374c11189ef704a3e4863646369f1b8e6a27d71",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
"lessThan": "24c1106504c625fabd3b7229611af617b4c27ac7",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
"lessThan": "045ee26aa3920a47ec46d7fcb302420bf01fd753",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
"lessThan": "9574b2330dbd2b5459b74d3b5e9619d39299fc6f",
"versionType": "git"
}
],
"programFiles": [
"crypto/af_alg.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.38"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.38",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.260",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.211",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.154",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.108",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.49",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.16.9",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"crypto/af_alg.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-39931
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30639 · Revision 1
- Added to Heist Feed
- Publisher date