CVE-2026-80637netfilter: synproxy: fix unaligned memory access in timestamp adjustment
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 48b1de4c110a7afa4b85862f6c75af817db26fad builds before 2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4; 48b1de4c110a7afa4b85862f6c75af817db26fad builds before 5c9c67cf7a3d16051dfb90e98836f530964dfb8e; from 48b1de4c110a7afa4b85862f6c75af817db26fad before ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7; from 48b1de4c110a7afa4b85862f6c75af817db26fad before 992c20bc8a4aba220c8b95b467d049289778dad6 | CNA record |
References
- https://git.kernel.org/stable/c/2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4
- https://git.kernel.org/stable/c/5c9c67cf7a3d16051dfb90e98836f530964dfb8e
- https://git.kernel.org/stable/c/ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7
- https://git.kernel.org/stable/c/992c20bc8a4aba220c8b95b467d049289778dad6
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.