Bug 2541234 (CVE-2026-97535)

Summary: CVE-2026-97535 kernel: scsi: qla2xxx: Bound VP index against VP_CTRL IOCB bitmap size
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's qla2xxx driver. A local user can cause a Denial of Service (DoS) via a system crash by triggering an out-of-bounds memory write during virtual port management. This issue occurs because the driver fails to validate virtual port index numbers against the fixed capacity of the internal command bitmap. As a result, processing an index that exceeds the bitmap boundary corrupts adjacent kernel memory.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-09-25 11:08:22 UTC 
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.
Comment 1 gkamathe 2026-09-28 20:46:14 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97535.mbox