Linux vulnerability

What happened

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.

Affected versions

Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 7ecfa46a536578a7ed335ddf31a854127268c27c (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 4abc1af7ac209c066f4e5dd75cdd56876e5829a9 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before d3bf9eae486490832bd08fd62ab0ac601f346bd4 (git); before 6.12.111 (semver); before 6.18.53 (semver) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.