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CVE-2026-89846

scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

The vulnerability affects the Linux kernel's qla2xxx SCSI driver, which handles QLogic Fibre Channel host bus adapters. A malicious or malfunctioning storage target can trigger an out-of-bounds read of adjacent kernel memory, potentially exposing that data in a command's sense buffer.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read In qla2x00_status_entry(), the FWI2 status path advances sense_data and shrinks par_sense_len by rsp_info_len: if (IS_FWI2_CAPABLE(ha)) { sense_data += rsp_info_len; par_sense_len -= rsp_info_len; } rsp_info_len is a 32-bit value taken directly from the target's FCP response (sf.rsp_data_len), while par_sense_len is the IOCB data area size (28 bytes for 24xx, 60 bytes for 29xx). A hostile or buggy target reporting an rsp_info_len larger than par_sense_len makes the unsigned subtraction underflow to a huge value and advances sense_data out of bounds. The underflowed par_sense_len then defeats the cap in qla2x00_handle_sense(): if (sense_len > par_sense_len) sense_len = par_sense_len; memcpy(cp->sense_buffer, sense_data, sense_len); so the memcpy reads up to SCSI_SENSE_BUFFERSIZE bytes from the out-of-bounds sense_data pointer, leaking adjacent response-ring/heap memory into the command's sense buffer. Clamp rsp_info_len to par_sense_len before the subtraction so par_sense_len can never underflow and sense_data stays within the IOCB data area. The fix sits before the comp_status switch, covering both qla2x00_handle_sense() call sites.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in 125b12861c726e58448bb95d55b04851fb131d1f; From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in e57ace988bda5693f7b3645f652ea4b4220870ee; From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in 6b08c0cb110a1fba92f99d655020198489699815; From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in be75ab791c9b3baca66c70ce03443afebc83acda; From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in ebc41dfc59d190956e0113e8bd90c28f6f21e8b9; From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in d7f7746ff031ae45724881261804f4bf5317c985; From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in f6e8977bce887481b2b2b0e2e14a791270741cfb; From 5544213be7b4fb693730106a6d70a8cc1aa7cdf6 · fixed in ca6d880d6c70cb7946e7b3e05d7285f271b6d99e

  • Linux Linux

    2.6.36

  • KernelLinux

    From 2.6.36 · fixed in 5.10.270; From 5.11.0 · 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 8

git.kernel.org