CVE-2026-45873

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4aacf3d78424293e318c616016865380b37b9cc5 < 7ca5813e1b21ef300e04593f47b073ef3217aac6affected
LinuxLinux2bf1435fa19d2c58054391b3bba40d5510a5758c < 029e5f6a95e905b12d6bc20421be32a01e0eb311affected
LinuxLinux318cb24a4c3fce8140afaf84e4d45fcb76fb280b < f1381ce0a1dd013610985e1c4260908163a427dfaffected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < f1535d56fc3f6c625b7e0559c006bd0318791bb1affected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < 05feaf826390fd16f1deb89dd9412def3b2a280faffected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < dad14d22dff1a191612acb98facceb303d0524a2affected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < e6497e06a102870803a59570d75ed2c36d7e11b3affected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < 4780ec142cbb24b794129d3080eee5cac2943ffcaffected
LinuxLinux7ab87a326f20c52ff4d9972052d085be951c704baffected
LinuxLinux181859bdfb9734aca449512fccaee4cacce64aedaffected
LinuxLinux5.10.166 < 5.10.252affected
LinuxLinux5.15.91 < 5.15.202affected
LinuxLinux6.1.9 < 6.1.165affected
LinuxLinux4.19.316 < 4.20affected
LinuxLinux5.4.262 < 5.5affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux5.10.252 <= 5.10.*unaffected
LinuxLinux5.15.202 <= 5.15.*unaffected
LinuxLinux6.1.165 <= 6.1.*unaffected
LinuxLinux6.6.128 <= 6.6.*unaffected
LinuxLinux6.12.75 <= 6.12.*unaffected
LinuxLinux6.18.14 <= 6.18.*unaffected
LinuxLinux6.19.4 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References