CVEvulnerability
CVE-2026-43074
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-05-06
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-401, CWE-416
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.
Affected configurations
• linux linux kernel (>= 6.4.1 < 6.6.136)
• linux linux kernel (>= 6.7 < 6.12.83)
• linux linux kernel (>= 6.13 < 6.18.24)
• linux linux kernel (>= 6.19 < 6.19.14)
• linux linux kernel 6.4
• linux linux kernel 7.0
Related
References
- https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f Patch
- https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9 Patch
- https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427 Patch
- https://git.kernel.org/stable/c/902120be4f44947df6311002addc7faf69bdbff1 git.kernel.org
- https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf Patch
- https://git.kernel.org/stable/c/a6d57084372161f86660bc4607784420e00efe2c git.kernel.org
- https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 Patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html cert-portal.siemens.com