5.5

CVE-2023-53304: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-53304DEBIAN-CVE-2023-53304
Published 16-09-2025Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2023-53304 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 16
RHSA-2024:2394RHSA-2024:3421SUSE-SU-2025:03600-1SUSE-SU-2025:03613-1SUSE-SU-2025:03615-1SUSE-SU-2025:03626-1

Timeline

  1. 16-09-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu108 products
  • linux< 5.15.0-87.97
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1048.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7ab87a326f20c52ff4d9972052d085be951c704b, < 8284a79136c384059e85e278da2210b809730287 | ≥ 181859bdfb9734aca449512fccaee4cacce64aed, < acaee227cf79c45a5d2d49c3e9a66333a462802c | ≥ 4aacf3d78424293e318c616016865380b37b9cc5, < 893cb3c3513cf661a0ff45fe0cfa83fe27131f76 | ≥ 2bf1435fa19d2c58054391b3bba40d5510a5758c, < 50cbb9d195c197af671869c8cadce3bd483735a0 | ≥ 318cb24a4c3fce8140afaf84e4d45fcb76fb280b, < 89a4d1a89751a0fbd520e64091873e19cc0979e8 | ≥ c9e6978e2725a7d4b6cd23b2facd3f11422c0643, < cd66733932399475fe933cb3ec03e687ed401462 | ≥ c9e6978e2725a7d4b6cd23b2facd3f11422c0643, < f718863aca469a109895cb855e6b81fff4827d71 | ≥ 5.10.166, < 5.10.190 | ≥ 5.15.91, < 5.15.124 | ≥ 6.1.9, < 6.1.43 | 6.2
  • linux_kernelEOL≥ 5.10.166, < 5.10.190 | ≥ 5.15.91, < 5.15.124 | ≥ 6.1.9, < 6.1.43 | ≥ 6.2.1, < 6.4.8 | 6.2 | 6.2:rc6 | 6.2:rc7 | 6.2:rc8 | 6.5:rc1 | 6.5:rc2 | 6.5:rc3
Debian1 product
  • linux< 6.1.52-1 | < 6.4.11-1

3 vendors · 111 products

References

11 links
Show all 11 references