CVE-2026-45873
netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets
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.
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
May 27, 2026, 2:48 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the patched version.
- Verify the integrity of the netfilter module.
- Test for correct interval overlap detection.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45873.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45873 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45873
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45873 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45873 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/029e5f6a95e905b12d6bc20421be32a01e0eb311 Added Reference https://git.kernel.org/stable/c/05feaf826390fd16f1deb89dd9412def3b2a280f Added Reference https://git.kernel.org/stable/c/4780ec142cbb24b794129d3080eee5cac2943ffc Added Reference https://git.kernel.org/stable/c/7ca5813e1b21ef300e04593f47b073ef3217aac6 Added Reference https://git.kernel.org/stable/c/dad14d22dff1a191612acb98facceb303d0524a2 Added Reference https://git.kernel.org/stable/c/e6497e06a102870803a59570d75ed2c36d7e11b3 Added Reference https://git.kernel.org/stable/c/f1381ce0a1dd013610985e1c4260908163a427df Added Reference https://git.kernel.org/stable/c/f1535d56fc3f6c625b7e0559c006bd0318791bb1