Race condition in Linux kernel - CVE-2026-74578
Published: August 21, 2026
Vulnerability identifier: #VU144576
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74578
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose plaintext and compromise cryptographic operation integrity.
The vulnerability exists due to improper synchronization of shared cryptographic state in the AIO/async path in skcipher_recvmsg() when handling async skcipher receive operations. A local user can race an asynchronous skcipher receive operation with sendmsg(ALG_SET_IV) to disclose plaintext and compromise cryptographic operation integrity.
The described plaintext recovery applies to CTR/stream modes through IV/keystream reuse.
Affected software
Linux kernel
How to mitigate CVE-2026-74578
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/60eafc7b08c6689ea3ad39eff8d97aefc8a087c7
- https://git.kernel.org/stable/c/73dd3bf704ca6c20639de70c08e9a10bee904a95
- https://git.kernel.org/stable/c/7b91e51d0eb7cbb07f7f086f9176bd93dbbc85dd
- https://git.kernel.org/stable/c/b05defc41b27c7d0c05c45f67bf5b91c28f93669
- https://git.kernel.org/stable/c/bf09b0be8e851f050e98da702d247c14d81b591a
- https://git.kernel.org/stable/c/d7860b682da55433b5da0591b0e4c1982ecd2689
- https://git.kernel.org/stable/c/f1a87ca0843d74482402a206ea2dfb315ee9acbd
- https://git.kernel.org/stable/c/fcc77d33a34cf271702e8daafb6c593e4626776d