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CVE-2026-97417

HIGHCVSS 7.5/10EPSS 0.43%

Last modified

CVE-2026-97417 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.43%

34.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9, < 740ad3d17a281f7764dda4dbeb37cea52e2e31ae; >= bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9, < a0523267de2523522b0f70972dd1ffa22ec6176c; >= bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9, < 55bcc3376cd7b18954cc9814da697504fdaf12bf; >= bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9, < 0d5ad732e4fdc569eb85861115e8f7b4c2c67852; >= bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9, < 7ecfa46a536578a7ed335ddf31a854127268c27c; >= bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9, < 4abc1af7ac209c066f4e5dd75cdd56876e5829a9; >= bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9, < d3bf9eae486490832bd08fd62ab0ac601f346bd4
LinuxLinux3.1

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-97417?
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.
How severe is CVE-2026-97417?
CVE-2026-97417 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2026-97417?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST