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Description

In 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().

PUBLISHED Reserved 2026-06-09 | Published 2026-07-10 | Updated 2026-07-10 | Assigner Linux

Product status

Default status
unaffected

b96ba312e21c9b7ac1526829b9640ddc06695c0b (git) before dd66f7f6e360ee82cd905517726f8e9091265de5
affected

b96ba312e21c9b7ac1526829b9640ddc06695c0b (git) before c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c
affected

b96ba312e21c9b7ac1526829b9640ddc06695c0b (git) before e9096a5a170e7ecd6467bc2e08668ec39897cda7
affected

Default status
affected

6.14
affected

Any version before 6.14
unaffected

6.18.36 (semver)
unaffected

7.0.13 (semver)
unaffected

7.1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/dd66f7f6e360ee82cd905517726f8e9091265de5

git.kernel.org/...c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c

git.kernel.org/...c/e9096a5a170e7ecd6467bc2e08668ec39897cda7

cve.org (CVE-2026-53363)

nvd.nist.gov (CVE-2026-53363)

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