Riskcovery

CVE-2026-53363

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

State
Published
Severity
9.8 Critical
Published
Jul 10, 2026
Updated
Aug 5, 2026
Reserved
Jun 9, 2026

Read the record on cve.org

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().

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • b96ba312e21c9b7ac1526829b9640ddc06695c0b to before dd66f7f6e360ee82cd905517726f8e9091265de5Affected
  • b96ba312e21c9b7ac1526829b9640ddc06695c0b to before c885d111ed9f5a0a1f3cc4e87a50db6518abaa6cAffected
  • b96ba312e21c9b7ac1526829b9640ddc06695c0b to before e9096a5a170e7ecd6467bc2e08668ec39897cda7Affected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.36 through 6.18.*Not affected
  • 7.0.13 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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