Vulnerability Details CVE-2026-53363
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().
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 21.7%
CVSS Severity
CVSS v3 Score 9.8
References
Products affected by CVE-2026-53363
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cpe:2.3:o:linux:linux_kernel:7.1