scsi: qla2xxx: Bound VP index against VP_CTRL IOCB bitmap size

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound VP index against VP_CTRL IOCB bitmap size The VP control IOCB selects its target virtual port by setting one bit in vp_idx_map, a fixed 16-byte (128-bit) array in both vp_ctrl_entry_24xx and vp_ctrl_entry_24xx_ext. qla25xx_ctrlvp_iocb() computes map = (vp_index - 1) / 8 and writes vce->vp_idx_map[map] without checking that map stays within the array. max_npiv_vports is taken from firmware and only sanitized to a MIN_MULTI_ID_FABRIC-aligned boundary, so it can legitimately be 191 or 255, and qla24xx_control_vp() only rejects vp_index >= max_npiv_vports. A vp_index above 128 therefore yields map >= 16 and an out-of-bounds write of up to 16 bytes past vp_idx_map, corrupting the trailing IOCB fields (or the adjacent request-ring slot on the 64-byte layout). Reject a vp_index that cannot be represented in the IOCB bitmap in qla24xx_control_vp(), and add a defensive ARRAY_SIZE() guard in qla25xx_ctrlvp_iocb() before the write. Adapters that report the usual 63 or 127 NPIV vports are unaffected.

Timeline

1. Sep 25, 2026, 10:21 AM UTCCVE published
2. Oct 21, 2026, 12:53 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 2853192e154b813fe34a6cbee5e34dfef50d29d0 · fixed in 674d783f2e80d0d7c1c86bf36dc0a09033e704de; From 2853192e154b813fe34a6cbee5e34dfef50d29d0 · fixed in c80a0362a0fe548c15a0324b1f61c04b62bb2174; From 2853192e154b813fe34a6cbee5e34dfef50d29d0 · fixed in 48a44e19746eaa70320a3c2571dcb345192fca72; From 2853192e154b813fe34a6cbee5e34dfef50d29d0 · fixed in 13354ad251ab009102597a791bc7c4d2265229e1; From 2853192e154b813fe34a6cbee5e34dfef50d29d0 · fixed in 878613ecb5a36db26859c4fd83daf9283a334fa2

• Linux Linux

  4.16

• KernelLinux

  From 4.16.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.53; From 6.19.0 · fixed in 7.2.7

References 5