scsi: qla2xxx: Fix response queue over-consumption in __qla_consume_iocb()

Summary

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().

Timeline

1. Sep 24, 2026, 3:40 PM UTCCVE published
2. Oct 19, 2026, 9:07 AM UTCRecord last updated

Affected versions

• Linux Linux

  From fac2807946c10b9a509b9c348afd442fa823c5f7 · fixed in a136c311676fd1010b1bde3bcfd410caa2fa040f; From fac2807946c10b9a509b9c348afd442fa823c5f7 · fixed in d841707fafba5f80341b82e8c3a4c24fc5aa5132; From fac2807946c10b9a509b9c348afd442fa823c5f7 · fixed in 6e3f129538c32d0019437197735912308c161843; From fac2807946c10b9a509b9c348afd442fa823c5f7 · fixed in bd1534d4afab47f13dfc27fff6f59dd859a0ac3a; From fac2807946c10b9a509b9c348afd442fa823c5f7 · fixed in 31715d1e1cbf3a37ce3452635c5602f73fd7abd4; From fac2807946c10b9a509b9c348afd442fa823c5f7 · fixed in df86c27cf1ba9d66f737a1fa56479c6e7efafe4e; From fac2807946c10b9a509b9c348afd442fa823c5f7 · fixed in 3ba019bdd89d931499d9476456b5d9c7ab7fa753

• Linux Linux

  5.15

• KernelLinux

  From 5.15.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.51; From 6.19.0 · fixed in 7.2.5

References 7