CVE-2026-98024

Description

In the Linux kernel, the following vulnerability has been resolved: s390/ism: folio_put() after error dmb->cpu_addr was allocated via folio_alloc(). Use folio_put() instead of kfree() in the error exit of ism_alloc_dmb() to avoid slab allocator corruption. While at it, reset dmb->cpu_addr after folio_put to avoid unintentional UAF by future callers.

References

• https://git.kernel.org/stable/c/60983356fab0c1171c5cb1b56a36349ebadc608e
• https://git.kernel.org/stable/c/890e2ef726904d1d8328e4b9f5090eeb8761b9d1
• https://git.kernel.org/stable/c/907a56ab3eb8a58500a58daa76087f17bb2b6826
• https://git.kernel.org/stable/c/eebb6a9017b55ac05be770cf7b89f9da49505ae7