xfrm: validate selector family and prefixlen during match

Summary

CVECVE-2026-72450
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:18 UTC
Updated2026-08-17 06:19:12 UTC
DescriptionIn 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).

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001760000 probability, percentile 0.073990000 (date 2026-08-17)


VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73 87a5bbccc7ff4edb3f42fea387124237d2ba91ee git Not specified
CNA Linux Linux affected 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71 bd7f202cf77556cff59f68dc30e4cdf40cb6e33b git Not specified
CNA Linux Linux affected bce1afaa212ec380bf971614f70909a27882b862 a3968ad4195d72c8fddcc6c0ef39da95ac98711a git Not specified
CNA Linux Linux affected 7d9868180bd1e4cf37e7c5067362658971162366 efa9e3b9f3dea2e1ea4c7edf4edc863faef85986 git Not specified
CNA Linux Linux affected 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 78783fefdc8f36879b1a17efa0d3195ea5f2dc5f git Not specified
CNA Linux Linux affected 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe git Not specified
CNA Linux Linux affected 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 5a03a2ee17e8259dde631ed84fd8322db06cb2ae git Not specified
CNA Linux Linux affected 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 40f0b1047918539f0b0f795ac65e35336b4c2c78 git Not specified
CNA Linux Linux affected f31398570acf0f0804c644006f7bfa9067106b0a git Not specified
CNA Linux Linux affected 401ad99a5ae7180dd9449eac104cb755f442e7f3 git Not specified
CNA Linux Linux affected e68dd80ba498265d2266b12dc3459164f4ff0c4a git Not specified
CNA Linux Linux affected 5.10.229 5.10.261 semver Not specified
CNA Linux Linux affected 5.15.170 5.15.212 semver Not specified
CNA Linux Linux affected 6.1.115 6.1.178 semver Not specified
CNA Linux Linux affected 6.6.59 6.6.145 semver Not specified
CNA Linux Linux affected 4.19.323 4.20 semver Not specified
CNA Linux Linux affected 5.4.285 5.5 semver Not specified
CNA Linux Linux affected 6.11.6 6.12 semver Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5a03a2ee17e8259dde631ed84fd8322db06cb2ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bd7f202cf77556cff59f68dc30e4cdf40cb6e33b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/40f0b1047918539f0b0f795ac65e35336b4c2c78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a3968ad4195d72c8fddcc6c0ef39da95ac98711a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/87a5bbccc7ff4edb3f42fea387124237d2ba91ee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/78783fefdc8f36879b1a17efa0d3195ea5f2dc5f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/efa9e3b9f3dea2e1ea4c7edf4edc863faef85986 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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