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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().
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().
This medium-severity vulnerability could be exploited under certain conditions to compromise security controls or access sensitive information. Should be addressed in a timely manner.
Probability of exploitation in the next 30 days · more likely than 23.0% of all CVEs.
Isolate affected systems from untrusted networks until patching is complete
Implement enhanced monitoring for exploitation attempts and unusual behavior