CVE-2026-89846

Summary

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.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/125b12861c726e58448bb95d55b04851fb131d1f
• https://git.kernel.org/stable/c/e57ace988bda5693f7b3645f652ea4b4220870ee
• https://git.kernel.org/stable/c/6b08c0cb110a1fba92f99d655020198489699815
• https://git.kernel.org/stable/c/be75ab791c9b3baca66c70ce03443afebc83acda
• https://git.kernel.org/stable/c/ebc41dfc59d190956e0113e8bd90c28f6f21e8b9
• https://git.kernel.org/stable/c/d7f7746ff031ae45724881261804f4bf5317c985
• https://git.kernel.org/stable/c/f6e8977bce887481b2b2b0e2e14a791270741cfb
• https://git.kernel.org/stable/c/ca6d880d6c70cb7946e7b3e05d7285f271b6d99e

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