Description
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.
References7
- git.kernel.org/stable/c/0d5ad732e4fdc569eb85861115e8f7b4c2c67852
- git.kernel.org/stable/c/4abc1af7ac209c066f4e5dd75cdd56876e5829a9
- git.kernel.org/stable/c/55bcc3376cd7b18954cc9814da697504fdaf12bf
- git.kernel.org/stable/c/740ad3d17a281f7764dda4dbeb37cea52e2e31ae
- git.kernel.org/stable/c/7ecfa46a536578a7ed335ddf31a854127268c27c
- git.kernel.org/stable/c/a0523267de2523522b0f70972dd1ffa22ec6176c
- git.kernel.org/stable/c/d3bf9eae486490832bd08fd62ab0ac601f346bd4
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 42 · as of 9 November 2026
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