netfilter: synproxy: fix unaligned memory access in timestamp adjustment
In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: fix unaligned memory access in timestamp adjustment Use get_unaligned_be32() and put_unaligned_be32() to safely read and write the timestamp fields. This prevents performance degradation due to unaligned memory access or even a crash on strict alignment architectures. This follows the implementation of timestamp parsing in the networking stack at tcp_parse_options() and synproxy_parse_options().
CVE-2026-80637
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-2026-80637
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": "48b1de4c110a7afa4b85862f6c75af817db26fad",
"lessThan": "95cda0446f51077c343fdd8264be2737eb25a6c3",
"versionType": "git"
},
{
"status": "affected",
"version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
"lessThan": "2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4",
"versionType": "git"
},
{
"status": "affected",
"version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
"lessThan": "5c9c67cf7a3d16051dfb90e98836f530964dfb8e",
"versionType": "git"
},
{
"status": "affected",
"version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
"lessThan": "ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7",
"versionType": "git"
},
{
"status": "affected",
"version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
"lessThan": "992c20bc8a4aba220c8b95b467d049289778dad6",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/nf_synproxy_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/nf_synproxy_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80637
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46617 · Revision 1
- Added to Heist Feed
- Publisher date