CVE-2026-45873
Published: May 29, 2026Last modified: June 24, 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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| 25 LTS | linux-lts | Fixed (6.12.80-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/029e5f6a95e905b12d6bc20421be32a01e0eb311
- https://git.kernel.org/stable/c/05feaf826390fd16f1deb89dd9412def3b2a280f
- https://git.kernel.org/stable/c/4780ec142cbb24b794129d3080eee5cac2943ffc
- https://git.kernel.org/stable/c/7ca5813e1b21ef300e04593f47b073ef3217aac6
- https://git.kernel.org/stable/c/dad14d22dff1a191612acb98facceb303d0524a2
- https://git.kernel.org/stable/c/e6497e06a102870803a59570d75ed2c36d7e11b3
- https://git.kernel.org/stable/c/f1381ce0a1dd013610985e1c4260908163a427df
- https://git.kernel.org/stable/c/f1535d56fc3f6c625b7e0559c006bd0318791bb1