CVE-2023-53304 - CVE House
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Status published Unknown CVE-2023-53304

netfilter: nft_set_rbtree: fix overlap expiration walk

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: fix overlap expiration walk The lazy gc on insert that should remove timed-out entries fails to release the other half of the interval, if any. Can be reproduced with tests/shell/testcases/sets/0044interval_overlap_0 in nftables.git and kmemleak enabled kernel. Second bug is the use of rbe_prev vs. prev pointer. If rbe_prev() returns NULL after at least one iteration, rbe_prev points to element that is not an end interval, hence it should not be removed. Lastly, check the genmask of the end interval if this is active in the current generation.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
7ab87a326f20c52ff4d9972052d085be951c704b, 181859bdfb9734aca449512fccaee4cacce64aed, 4aacf3d78424293e318c616016865380b37b9cc5, 2bf1435fa19d2c58054391b3bba40d5510a5758c, 318cb24a4c3fce8140afaf84e4d45fcb76fb280b, c9e6978e2725a7d4b6cd23b2facd3f11422c0643, 5.10.166, 5.15.91, 6.1.9, 6.2, 0, 5.10.190, 5.15.124, 6.1.43, 6.4.8, 6.5

Timeline

Official Publish: September 16th, 2025
Last Modified: May 23rd, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.