CVEvulnerability
CVE-2026-93242
- Status
- Received
- Published
- 2026-09-24
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Fix response queue over-consumption in __qla_consume_iocb()
qla24xx_process_response_queue() advances ring_ptr past the head IOCB
before dispatching, so by the time __qla_consume_iocb() runs, ring_ptr
already points at the first continuation IOCB. The function however
looped purex->entry_count times starting at ring_ptr. As entry_count
includes the head, this consumed one entry too many: it stamped
RESPONSE_PROCESSED on the next, unrelated IOCB and advanced the ring
past it, silently dropping a legitimate firmware response. The head
IOCB's signature was also never marked.
Mark the head processed and account for it, then consume only the
entry_count - 1 continuation IOCBs, matching __qla_copy_purex_to_buffer().
References
- https://git.kernel.org/stable/c/31715d1e1cbf3a37ce3452635c5602f73fd7abd4 git.kernel.org
- https://git.kernel.org/stable/c/3ba019bdd89d931499d9476456b5d9c7ab7fa753 git.kernel.org
- https://git.kernel.org/stable/c/6e3f129538c32d0019437197735912308c161843 git.kernel.org
- https://git.kernel.org/stable/c/a136c311676fd1010b1bde3bcfd410caa2fa040f git.kernel.org
- https://git.kernel.org/stable/c/bd1534d4afab47f13dfc27fff6f59dd859a0ac3a git.kernel.org
- https://git.kernel.org/stable/c/d841707fafba5f80341b82e8c3a4c24fc5aa5132 git.kernel.org
- https://git.kernel.org/stable/c/df86c27cf1ba9d66f737a1fa56479c6e7efafe4e git.kernel.org