CVE-2026-97417
netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack()
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack() The timestamp-only fast path dereferences the option stream as *(__be32 *)ptr, which assumes 4-byte alignment that the TCP option stream does not guarantee. Use get_unaligned_be32() instead, which reads the value safely and already returns host byte order, so the htonl() on the comparison constant can be dropped. This matches the existing get_unaligned_be32() use later in the same function.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 24, 2026 |
| Last Updated | Oct 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 < 740ad3d17a281f7764dda4dbeb37cea52e2e31ae bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 < a0523267de2523522b0f70972dd1ffa22ec6176c bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 < 55bcc3376cd7b18954cc9814da697504fdaf12bf bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 < 0d5ad732e4fdc569eb85861115e8f7b4c2c67852 bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 < 7ecfa46a536578a7ed335ddf31a854127268c27c bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 < 4abc1af7ac209c066f4e5dd75cdd56876e5829a9 bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 < d3bf9eae486490832bd08fd62ab0ac601f346bd4
Linux / Linux
3.1
References
git.kernel.org: https://git.kernel.org/stable/c/740ad3d17a281f7764dda4dbeb37cea52e2e31ae git.kernel.org: https://git.kernel.org/stable/c/a0523267de2523522b0f70972dd1ffa22ec6176c git.kernel.org: https://git.kernel.org/stable/c/55bcc3376cd7b18954cc9814da697504fdaf12bf git.kernel.org: https://git.kernel.org/stable/c/0d5ad732e4fdc569eb85861115e8f7b4c2c67852 git.kernel.org: https://git.kernel.org/stable/c/7ecfa46a536578a7ed335ddf31a854127268c27c git.kernel.org: https://git.kernel.org/stable/c/4abc1af7ac209c066f4e5dd75cdd56876e5829a9 git.kernel.org: https://git.kernel.org/stable/c/d3bf9eae486490832bd08fd62ab0ac601f346bd4