crypto: af_alg - limit RX SG extraction by receive buffer budget
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - limit RX SG extraction by receive buffer budget Make af_alg_get_rsgl() limit each RX scatterlist extraction to the remaining receive buffer budget. af_alg_get_rsgl() currently uses af_alg_readable() only as a gate before extracting data into the RX scatterlist. Limit each extraction to the remaining af_alg_rcvbuf(sk) budget so that receive-side accounting matches the amount of data attached to the request. If skcipher cannot obtain enough RX space for at least one chunk while more data remains to be processed, reject the recvmsg call instead of rounding the request length down to zero.
CVE-2026-31677
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-2026-31677
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": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
"lessThan": "7e345de2e69475430af85e09210795d8eb8e719c",
"versionType": "git"
},
{
"status": "affected",
"version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
"lessThan": "9bf3e6ccfdcfe56ae3190d1ae987dacf1cfef4f9",
"versionType": "git"
},
{
"status": "affected",
"version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
"lessThan": "07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453",
"versionType": "git"
},
{
"status": "affected",
"version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
"lessThan": "4a264b2614c73c96666e196bbabe0cead52bdba7",
"versionType": "git"
},
{
"status": "affected",
"version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
"lessThan": "8eceab19eba9dcbfd2a0daec72e1bf48aa100170",
"versionType": "git"
}
],
"programFiles": [
"crypto/af_alg.c",
"crypto/algif_skcipher.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.83",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"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",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"crypto/af_alg.c",
"crypto/algif_skcipher.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31677
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46238 · Revision 1
- Added to Heist Feed
- Publisher date