crypto: virtio - bound the akcipher result length
In the Linux kernel, the following vulnerability has been resolved: crypto: virtio - bound the akcipher result length virtio_crypto_dataq_akcipher_callback() sets the result length from the device-reported response length without bounding it to the destination buffer, which was allocated for the original request length. sg_copy_from_buffer() then reads that many bytes from the destination buffer; a backend reporting a larger length over-reads adjacent kernel heap into the caller's scatterlist (an out-of-bounds read). Clamp the reported length to the originally requested destination length. A conforming device reports no more than that, so valid results are unaffected.
CVE-2026-80836
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-2026-80836
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": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
"lessThan": "bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78",
"versionType": "git"
},
{
"status": "affected",
"version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
"lessThan": "12c4f29e97f31b013f77ad65ba7daeb02aaa6abe",
"versionType": "git"
},
{
"status": "affected",
"version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
"lessThan": "5545de5050cbc3594506d74f2c392b0716cf8bca",
"versionType": "git"
},
{
"status": "affected",
"version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
"lessThan": "3fda114a42f1510a4ec8a0b17a0cfc997952ccc2",
"versionType": "git"
},
{
"status": "affected",
"version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
"lessThan": "1f9f877b1ef1fbd4ee95571cddf39c8002cee252",
"versionType": "git"
},
{
"status": "affected",
"version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
"lessThan": "f77a956f6a19f9463ef1527c9d0cda50dded6b92",
"versionType": "git"
}
],
"programFiles": [
"drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.49",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.13",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.3",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80836
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34852 · Revision 1
- Added to Heist Feed
- Publisher date