Vulnerability in Linux

CVE-2023-52581

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.

EPSS: 0.003 (17.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

  • Linux — versions ea3eb9f2192e4fc33b795673e56c97a21987f868, 0624f190b5742a1527cd938295caa8dc5281d4cd, 6.4.11
  • Linux Linux_kernel — versions 6.6

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-52581?
CVE-2023-52581 is a medium-severity vulnerability in Linux, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.3/10. Published 2024-03-02.
How severe is CVE-2023-52581?
Medium severity. CVSS v3 base score is 6.3 out of 10.
Is CVE-2023-52581 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.