CVE-2024-26945: crypto: iaa - Fix nr_cpus < nr_iaa case

Severity: high (CVSS 8.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-01 · updated 2026-06-17
Weakness: CWE-369

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: iaa - Fix nr_cpus < nr_iaa case If nr_cpus < nr_iaa, the calculated cpus_per_iaa will be 0, which causes a divide-by-0 in rebalance_wq_table(). Make sure cpus_per_iaa is 1 in that case, and also in the nr_iaa == 0 case, even though cpus_per_iaa is never used if nr_iaa == 0, for paranoia.

Affected products

Linux kernel: before 6.8.3; 6.9-rc1 — fixed in 6.8.3

How to fix

Upgrade to a fixed version: Linux kernel 6.8.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/5a7e89d3315d1be86aff8a8bf849023cda6547f7
https://git.kernel.org/stable/c/a5ca1be7f9817de4e93085778b3ee2219bdc2664
https://git.kernel.org/stable/c/5a7e89d3315d1be86aff8a8bf849023cda6547f7
https://git.kernel.org/stable/c/a5ca1be7f9817de4e93085778b3ee2219bdc2664

Get alerted when CVE-2024-26945 or the next vulnerability affects your stack