CVE-2023-52927

Advisory lineage Upstream: 0 Downstream: 43
Modified
Published: 14 Mar 2025, 14:25
Last modified:12 May 2026, 11:21

Vulnerability Summary

Overall Risk (default)
medium
41/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

14 Mar 2025, 14:25
Published
Vulnerability first disclosed
12 May 2026, 11:21
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: allow exp not to be removed in nf_ct_find_expectation Currently nf_conntrack_in() calling nf_ct_find_expectation() will remove the exp from the hash table. However, in some scenario, we expect the exp not to be removed when the created ct will not be confirmed, like in OVS and TC conntrack in the following patches. This patch allows exp not to be removed by setting IPS_CONFIRMED in the status of the tmpl.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.03%• Percentile: 10%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ 1bc91a5ddf3eaea0e0ea957cccf3abdcfcace00e, < 3fa58a6fbd1e9e5682d09cdafb08fba004cb12ec | ≥ 1bc91a5ddf3eaea0e0ea957cccf3abdcfcace00e, < 4914109a8e1e494c6aa9852f9e84ec77a5fc643f | 5.18

  • linux•linux_kernel

    ≥ 5.18, < 6.1.130 | ≥ 6.2, < 6.6

References (5)