CVE-2026-45873

netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets

State: Published
Severity: Not scored
Published: May 27, 2026
Updated: May 27, 2026
Reserved: May 13, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets

Userspace provides an optimized representation in case intervals are adjacent, where the end element is omitted.

The existing partial overlap detection logic skips anonymous set checks on start elements for this reason.

However, it is possible to add intervals that overlap to this anonymous where two start elements with the same, eg. A-B, A-C where C < B.

start end A B start end A C

Restore the check on overlapping start elements to report an overlap.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	4aacf3d78424293e318c616016865380b37b9cc5 to before 7ca5813e1b21ef300e04593f47b073ef3217aac6Affected 2bf1435fa19d2c58054391b3bba40d5510a5758c to before 029e5f6a95e905b12d6bc20421be32a01e0eb311Affected 318cb24a4c3fce8140afaf84e4d45fcb76fb280b to before f1381ce0a1dd013610985e1c4260908163a427dfAffected c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before f1535d56fc3f6c625b7e0559c006bd0318791bb1Affected c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before 05feaf826390fd16f1deb89dd9412def3b2a280fAffected c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before dad14d22dff1a191612acb98facceb303d0524a2Affected c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before e6497e06a102870803a59570d75ed2c36d7e11b3Affected c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before 4780ec142cbb24b794129d3080eee5cac2943ffcAffected 7ab87a326f20c52ff4d9972052d085be951c704bAffected 181859bdfb9734aca449512fccaee4cacce64aedAffected 5.10.166 to before 5.10.252Affected 5.15.91 to before 5.15.202Affected 6.1.9 to before 6.1.165Affected 4.19.316 to before 4.20Affected 5.4.262 to before 5.5Affected
LinuxLinux	6.2Affected before 6.2Not affected 5.10.252 through 5.10.Not affected 5.15.202 through 5.15.Not affected 6.1.165 through 6.1.Not affected 6.6.128 through 6.6.Not affected 6.12.75 through 6.12.Not affected 6.18.14 through 6.18.Not affected 6.19.4 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

4aacf3d78424293e318c616016865380b37b9cc5 to before 7ca5813e1b21ef300e04593f47b073ef3217aac6Affected
2bf1435fa19d2c58054391b3bba40d5510a5758c to before 029e5f6a95e905b12d6bc20421be32a01e0eb311Affected
318cb24a4c3fce8140afaf84e4d45fcb76fb280b to before f1381ce0a1dd013610985e1c4260908163a427dfAffected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before f1535d56fc3f6c625b7e0559c006bd0318791bb1Affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before 05feaf826390fd16f1deb89dd9412def3b2a280fAffected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before dad14d22dff1a191612acb98facceb303d0524a2Affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before e6497e06a102870803a59570d75ed2c36d7e11b3Affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to before 4780ec142cbb24b794129d3080eee5cac2943ffcAffected
7ab87a326f20c52ff4d9972052d085be951c704bAffected
181859bdfb9734aca449512fccaee4cacce64aedAffected
5.10.166 to before 5.10.252Affected
5.15.91 to before 5.15.202Affected
6.1.9 to before 6.1.165Affected
4.19.316 to before 4.20Affected
5.4.262 to before 5.5Affected

LinuxLinux

6.2Affected
before 6.2Not affected
5.10.252 through 5.10.*Not affected
5.15.202 through 5.15.*Not affected
6.1.165 through 6.1.*Not affected
6.6.128 through 6.6.*Not affected
6.12.75 through 6.12.*Not affected
6.18.14 through 6.18.*Not affected
6.19.4 through 6.19.*Not affected
7.0 and laterNot affected

References

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