CVE-2026-53363xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b96ba312e21c9b7ac1526829b9640ddc06695c0b before dd66f7f6e360ee82cd905517726f8e9091265de5; from b96ba312e21c9b7ac1526829b9640ddc06695c0b before c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c; from b96ba312e21c9b7ac1526829b9640ddc06695c0b before e9096a5a170e7ecd6467bc2e08668ec39897cda7 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.14 before 6.18.36; from 6.19 before 7.0.13; 7.1; 7.1; 7.1; 7.1; 7.1; 7.1; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/dd66f7f6e360ee82cd905517726f8e9091265de5patch
- https://git.kernel.org/stable/c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6cpatch
- https://git.kernel.org/stable/c/e9096a5a170e7ecd6467bc2e08668ec39897cda7patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.