CVE-2026-43074

Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 06 May 2026, 07:21
Last modified:01 Jun 2026, 16:14

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.13% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 May 2026, 07:21
Published
Vulnerability first disclosed
01 Jun 2026, 16:14
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU callback to prevent UAF.

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: 0.13%• Percentile: 3%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ f2451def095c1743adcfcb0cb5dadc86034e162a, < 902120be4f44947df6311002addc7faf69bdbff1 | ≥ a1f93804449d13f97dabd4b996817de4bf1ed67a, < a6d57084372161f86660bc4607784420e00efe2c | ≥ 58c9b016e12855286370dfb704c08498edbc857a, < a6566cd33f6f967a7651ebf2ce0dd31572e319cf | ≥ 58c9b016e12855286370dfb704c08498edbc857a, < 5b1173b165421561db29f30afc7e97d940a398a9 | ≥ 58c9b016e12855286370dfb704c08498edbc857a, < 7e8083f5eeedab0f460063b9c2c14c9a4e71a427 | ≥ 58c9b016e12855286370dfb704c08498edbc857a, < ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 | ≥ 58c9b016e12855286370dfb704c08498edbc857a, < 07712db80857d5d09ae08f3df85a708ecfc3b61f | 6.4

  • linux•linux kernel

    ≥ 6.4.1, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | 6.4 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7

References (7)