Out-of-bounds Read Affecting kernel-uki-virt-addons package, versions <0:6.12.0-211.59.1.el10_2


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.71% (52nd percentile)

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  • Snyk IDSNYK-CENTOS10-KERNELUKIVIRTADDONS-20053924
  • published23 Sept 2026
  • disclosed16 Sept 2026

Introduced: 16 Sep 2026

NewCVE-2026-89846  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Centos:10 kernel-uki-virt-addons to version 0:6.12.0-211.59.1.el10_2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uki-virt-addons package and not the kernel-uki-virt-addons package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

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 &gt; par_sense_len)
    sense_len = par_sense_len;
memcpy(cp-&gt;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.

CVSS Base Scores

version 3.1