CVE-2026-45873

netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets

MEDIUM

5.5

CVSS Score

Published: May 27, 2026 at 12:15 PM UTC

Updated: June 27, 2026 at 11:41 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v ≥ 4.19.316v ≥ 5.4.2624.19.316 ≤ v < 4.205.10.166 ≤ v < 5.10.2525.15.91 ≤ v < 5.15.2025.4.262 ≤ v < 5.56.1.9 ≤ v < 6.1.1656.13 ≤ v < 6.18.146.19 ≤ v < 6.19.46.2 ≤ v < 6.12.756.2 ≤ v < 6.18.146.2 ≤ v < 6.19.46.2 ≤ v < 6.6.1286.2 ≤ v < 7.06.2.1 ≤ v < 6.6.1286.7 ≤ v < 6.12.75181859bdfb9734aca449512fccaee4cacce64aed2bf1435fa19d2c58054391b3bba40d5510a5758c318cb24a4c3fce8140afaf84e4d45fcb76fb280b4.19.3164aacf3d78424293e318c616016865380b37b9cc55.10.166 5.15.91 5.4.262 6.1.9 6.2 6.2 rc6 6.2 rc7 6.2 rc87ab87a326f20c52ff4d9972052d085be951c704bc9e6978e2725a7d4b6cd23b2facd3f11422c0643

Vendor states this is fixed in 029e5f6a95e905b12d6bc20421be32a01e0eb311 (fixed)

Vendor states this is fixed in 05feaf826390fd16f1deb89dd9412def3b2a280f (fixed)

Vendor states this is fixed in 4780ec142cbb24b794129d3080eee5cac2943ffc (fixed)

Vendor states this is fixed in 7ca5813e1b21ef300e04593f47b073ef3217aac6 (fixed)

Vendor states this is fixed in dad14d22dff1a191612acb98facceb303d0524a2 (fixed)

Vendor states this is fixed in e6497e06a102870803a59570d75ed2c36d7e11b3 (fixed)

Vendor states this is fixed in f1381ce0a1dd013610985e1c4260908163a427df (fixed)

Vendor states this is fixed in f1535d56fc3f6c625b7e0559c006bd0318791bb1 (fixed)

Affected range stops below 4.20, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 5.10.252 (unaffected)

Vendor states this is fixed in 5.15.202 (unaffected)

Affected range stops below 5.5, so it looks safe — our inference, not a vendor statement