CVE-2026-53363 Details
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().
A vulnerability exists in the Linux kernel's IP Transport File System (IPTFS) handling within the XFRM framework. The issue arises in the 'iptfs_consume_frags()' function, which transfers paged fragments between socket buffers but neglects to carry over the SKBFL_SHARED_FRAG flag. This omission is critical as it relates to fragments supported by read-only page-cache pages, which, if not properly marked, can lead to incorrect decisions regarding the safety of in-place encryption. The vulnerability affects Linux kernel versions 6.14 and later.
The vulnerability has been addressed in the Linux kernel. Users should upgrade to the latest version where this fix is applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c | kernel.org | Patch |
| https://git.kernel.org/stable/c/dd66f7f6e360ee82cd905517726f8e9091265de5 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e9096a5a170e7ecd6467bc2e08668ec39897cda7 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.14, < 6.18.36 >= 6.19, < 7.0.13 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 7.1 rc7 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | Initial Analysis | [email protected] |
| Jul 18, 2026 | CVE Modified | kernel.org |
| Jul 10, 2026 | New CVE Received | kernel.org |