netfilter: synproxy: fix unaligned memory access in timestamp adjustment

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80637
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:48 UTC
Updated2026-08-28 08:16:48 UTC
DescriptionIn 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().

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.062700000 (date 2026-08-28)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 48b1de4c110a7afa4b85862f6c75af817db26fad 2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4 git Not specified
CNA Linux Linux affected 48b1de4c110a7afa4b85862f6c75af817db26fad 5c9c67cf7a3d16051dfb90e98836f530964dfb8e git Not specified
CNA Linux Linux affected 48b1de4c110a7afa4b85862f6c75af817db26fad ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7 git Not specified
CNA Linux Linux affected 48b1de4c110a7afa4b85862f6c75af817db26fad 992c20bc8a4aba220c8b95b467d049289778dad6 git Not specified
CNA Linux Linux affected 3.12 Not specified
CNA Linux Linux unaffected 3.12 semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5c9c67cf7a3d16051dfb90e98836f530964dfb8e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/992c20bc8a4aba220c8b95b467d049289778dad6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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