7.8

CVE-2023-52923: netfilter: nf_tables: adapt set backend to use GC transaction API

Modified
AliasesUBUNTU-CVE-2023-52923DEBIAN-CVE-2023-52923
Published 20-01-2025Last modified 05-08-2026

Vulnerability summary

CVE-2023-52923 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.01 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 29 · Related 29
SUSE-SU-2025:02588-1SUSE-SU-2025:02848-1SUSE-SU-2025:02849-1SUSE-SU-2025:02851-1SUSE-SU-2025:02852-1SUSE-SU-2025:0289-1

Timeline

  1. 20-01-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: adapt set backend to use GC transaction API Use the GC transaction API to replace the old and buggy gc API and the busy mark approach. No set elements are removed from async garbage collection anymore, instead the _DEAD bit is set on so the set element is not visible from lookup path anymore. Async GC enqueues transaction work that might be aborted and retried later. rbtree and pipapo set backends does not set on the _DEAD bit from the sync GC path since this runs in control plane path where mutex is held. In this case, set elements are deactivated, removed and then released via RCU callback, sync GC never fails.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

Increase +0.01 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

No weakness data has been published for this record.

Affected systems

Version check

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

Ubuntu116 products
  • linuxAll versions (No fix recorded) | < 5.4.0-173.191 | < 5.15.0-87.97
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1120.130 | < 5.15.0-1048.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 9d0982927e79049675cb6c6c04a0ebb3dad5a434, < cb4d00b563675ba8ff6ef94b077f58d816f68ba3 | ≥ 9d0982927e79049675cb6c6c04a0ebb3dad5a434, < c357648929c8dff891502349769aafb8f0452bc2 | ≥ 9d0982927e79049675cb6c6c04a0ebb3dad5a434, < 146c76866795553dbc19998f36718d7986ad302b | ≥ 9d0982927e79049675cb6c6c04a0ebb3dad5a434, < 479a2cf5259347d6a1f658b0f791d27a34908e91 | ≥ 9d0982927e79049675cb6c6c04a0ebb3dad5a434, < df650d6a4bf47248261b61ef6b174d7c54034d15 | ≥ 9d0982927e79049675cb6c6c04a0ebb3dad5a434, < e4d71d6a9c7db93f7bf20c3a0f0659d63d7de681 | ≥ 9d0982927e79049675cb6c6c04a0ebb3dad5a434, < f6c383b8c31a93752a52697f8430a71dcbc46adf | 4.1
  • linux_kernel≥ 4.1, < 4.19.316 | ≥ 4.20, < 5.4.262 | ≥ 5.5, < 5.10.198 | ≥ 5.11, < 5.15.134 | ≥ 5.16, < 6.1.56 | ≥ 6.2, < 6.4.11 | 6.5:rc1 | 6.5:rc2 | 6.5:rc3 | 6.5:rc4 | 6.5:rc5
Debian1 product
  • linux< 6.1.64-1 | < 6.4.11-1

3 vendors · 119 products

References

11 links
Show all 11 references