6.3

CVE-2023-52581: netfilter: nf_tables: fix memleak when more than 255 elements expired

Analyzed
AliasesUBUNTU-CVE-2023-52581DEBIAN-CVE-2023-52581
Published 02-03-2024Last modified 23-05-2026

Vulnerability summary

CVE-2023-52581 is a medium (CVSS 6.3) vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 11
RHSA-2024:2394RHSA-2024:2950RHSA-2024:3138SUSE-SU-2024:2010-1SUSE-SU-2024:2183-1SUSE-SU-2024:2185-1

Timeline

  1. 02-03-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memleak when more than 255 elements expired When more than 255 elements expired we're supposed to switch to a new gc container structure. This never happens: u8 type will wrap before reaching the boundary and nft_trans_gc_space() always returns true. This means we recycle the initial gc container structure and lose track of the elements that came before. While at it, don't deref 'gc' after we've passed it to call_rcu.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.26% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu102 products
  • linux< 5.15.0-94.104
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1053.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8da1b048f9a501d3d7d38c188ba09d7d0d5b8c27, < 7cf055b43756b10aa2b851c927c940f5ed652125 | ≥ bbdb3b65aa91aa0a32b212f27780b28987f2d94f, < a995a68e8a3b48533e47c856865d109a1f1a9d01 | ≥ 448be0774882f95a74fa5eb7519761152add601b, < 09c85f2d21ab6b5acba31a037985b13e8e6565b8 | ≥ d19e8bf3ea4114dd21fc35da21f398203d7f7df1, < ef99506eaf1dc31feff1adfcfd68bc5535a22171 | ≥ ea3eb9f2192e4fc33b795673e56c97a21987f868, < 7e5d732e6902eb6a37b35480796838a145ae5f07 | ≥ 5f68718b34a531a556f2f50300ead2862278da26, < 4aea243b6853d06c1d160a9955b759189aa02b14 | ≥ 5f68718b34a531a556f2f50300ead2862278da26, < cf5000a7787cbc10341091d37245a42c119d26c5 | 0624f190b5742a1527cd938295caa8dc5281d4cd | ≥ 6.4.11, < 6.5 | 6.5
  • linux_kernel≥ 6.5, < 6.5.6 | 6.6:rc1 | 6.6:rc2
Debian1 product
  • linux< 6.5.6-1

3 vendors · 105 products

References

11 links
Show all 11 references