eventpoll: defer struct eventpoll free to RCU grace period (Linux Linux)

CVE-2026-43074
HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.48 % · percentile 42 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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.

Weaknesses (CWE)

  • CWE-416 — Use After Free
  • CWE-401 — Missing Release of Memory after Effective Lifetime

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected f2451def095c1743adcfcb0cb5dadc86034e162a < 902120be4f44947df6311002addc7faf69bdbff1 ; affected a1f93804449d13f97dabd4b996817de4bf1ed67a < a6d57084372161f86660bc4607784420e00efe2c ; affected 58c9b016e12855286370dfb704c08498edbc857a < a6566cd33f6f967a7651ebf2ce0dd31572e319cf ; affected 58c9b016e12855286370dfb704c08498edbc857a < 5b1173b165421561db29f30afc7e97d940a398a9 ; affected 58c9b016e12855286370dfb704c08498edbc857a < 7e8083f5eeedab0f460063b9c2c14c9a4e71a427 ; affected 58c9b016e12855286370dfb704c08498edbc857a < ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322
Linux · Linuxaffected 6.4 ; unaffected 0 < 6.4 ; unaffected 6.6.136 ≤ 6.6.* ; unaffected 6.12.83 ≤ 6.12.* ; unaffected 6.18.24 ≤ 6.18.* ; unaffected 6.19.14 ≤ 6.19.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD