CVE-2026-43074
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f2451def095c1743adcfcb0cb5dadc86034e162a < 902120be4f44947df6311002addc7faf69bdbff1 | affected |
| Linux | Linux | a1f93804449d13f97dabd4b996817de4bf1ed67a < a6d57084372161f86660bc4607784420e00efe2c | affected |
| Linux | Linux | 58c9b016e12855286370dfb704c08498edbc857a < a6566cd33f6f967a7651ebf2ce0dd31572e319cf | affected |
| Linux | Linux | 58c9b016e12855286370dfb704c08498edbc857a < 5b1173b165421561db29f30afc7e97d940a398a9 | affected |
| Linux | Linux | 58c9b016e12855286370dfb704c08498edbc857a < 7e8083f5eeedab0f460063b9c2c14c9a4e71a427 | affected |
| Linux | Linux | 58c9b016e12855286370dfb704c08498edbc857a < ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 | affected |
| Linux | Linux | 58c9b016e12855286370dfb704c08498edbc857a < 07712db80857d5d09ae08f3df85a708ecfc3b61f | affected |
| Linux | Linux | 6.4 | affected |
| Linux | Linux | 0 < 6.4 | unaffected |
| Linux | Linux | 6.6.136 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.83 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.24 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.14 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/902120be4f44947df6311002addc7faf69bdbff1
- https://git.kernel.org/stable/c/a6d57084372161f86660bc4607784420e00efe2c
- https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf
- https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9
- https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427
- https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322
- https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f
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