xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()

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Summary

CVECVE-2026-53363
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-10 12:17:22 UTC
Updated2026-07-10 12:17:22 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags() iptfs_consume_frags() transfers paged fragments from one socket buffer to another but fails to propagate the SKBFL_SHARED_FRAG flag. This is the same class of bug that was fixed in skb_try_coalesce() for CVE-2026-46300: when fragments backed by read-only page-cache pages are merged, the marker indicating their shared nature must be preserved so that ESP can decide correctly whether in-place encryption is safe. Apply the same two-line fix used in skb_try_coalesce() to iptfs_consume_frags().

Risk And Classification

EPSS: 0.001110000 probability, percentile 0.015590000 (date 2026-07-11)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b96ba312e21c9b7ac1526829b9640ddc06695c0b dd66f7f6e360ee82cd905517726f8e9091265de5 git Not specified
CNA Linux Linux affected b96ba312e21c9b7ac1526829b9640ddc06695c0b c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c git Not specified
CNA Linux Linux affected b96ba312e21c9b7ac1526829b9640ddc06695c0b e9096a5a170e7ecd6467bc2e08668ec39897cda7 git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e9096a5a170e7ecd6467bc2e08668ec39897cda7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dd66f7f6e360ee82cd905517726f8e9091265de5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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