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CVE-2026-72450

HIGHCVSS 7.8/10EPSS 0.22%

Last modified

CVE-2026-72450 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: xfrm: validate selector family and prefixlen during match syzbot reported a shift-out-of-bounds in xfrm_selector_match() due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set). Fix this by: - Rejecting mismatched families in xfrm_selector_match. - Returning false in addr4_match if prefixlen > 32. - Returning false in addr_match if prefixlen > 128 (prevents overflow).. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: validate selector family and prefixlen during match syzbot reported a shift-out-of-bounds in xfrm_selector_match() due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set). Fix this by: - Rejecting mismatched families in xfrm_selector_match. - Returning false in addr4_match if prefixlen > 32. - Returning false in addr_match if prefixlen > 128 (prevents overflow).

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.22%

12.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73, < 87a5bbccc7ff4edb3f42fea387124237d2ba91ee; >= 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71, < bd7f202cf77556cff59f68dc30e4cdf40cb6e33b; >= bce1afaa212ec380bf971614f70909a27882b862, < a3968ad4195d72c8fddcc6c0ef39da95ac98711a; >= 7d9868180bd1e4cf37e7c5067362658971162366, < efa9e3b9f3dea2e1ea4c7edf4edc863faef85986; >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563, < 78783fefdc8f36879b1a17efa0d3195ea5f2dc5f; >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563, < 6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe; >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563, < 5a03a2ee17e8259dde631ed84fd8322db06cb2ae; >= 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563, < 40f0b1047918539f0b0f795ac65e35336b4c2c78; f31398570acf0f0804c644006f7bfa9067106b0a; 401ad99a5ae7180dd9449eac104cb755f442e7f3; e68dd80ba498265d2266b12dc3459164f4ff0c4a; >= 5.10.229, < 5.10.261; >= 5.15.170, < 5.15.212; >= 6.1.115, < 6.1.178; >= 6.6.59, < 6.6.145; >= 4.19.323, < 4.20; >= 5.4.285, < 5.5; >= 6.11.6, < 6.12
LinuxLinux6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72450?
In the Linux kernel, the following vulnerability has been resolved: xfrm: validate selector family and prefixlen during match syzbot reported a shift-out-of-bounds in xfrm_selector_match() due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set). Fix this by: - Rejecting mismatched families in xfrm_selector_match. - Returning false in addr4_match if prefixlen > 32. - Returning false in addr_match if prefixlen > 128 (prevents overflow).
How severe is CVE-2026-72450?
CVE-2026-72450 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72450?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST