Out-of-bounds read in Linux kernel - CVE-2026-89858
Published: September 17, 2026
Vulnerability identifier: #VU150431
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89858
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose kernel stack memory to a device.
The vulnerability exists due to an out-of-bounds read in qla2x00_update_fru_versions() when processing BSG requests with an oversized declared image count. A local user can submit a crafted BSG request to disclose kernel stack memory to a device.
Affected software
Linux kernel
How to mitigate CVE-2026-89858
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/047f1f7ee6f85bde28abfdda9fa550191ddc0532
- https://git.kernel.org/stable/c/7b22b4cb8822805cef7ba618da6f76e1474d68bd
- https://git.kernel.org/stable/c/7e3154c97ec15460f715dbbe4097c255cce110b1
- https://git.kernel.org/stable/c/a9706d5e754e77515a92bb532bd0d73644979a1f
- https://git.kernel.org/stable/c/af733bbfcf667af1871a2735fba2835b0da71efb
- https://git.kernel.org/stable/c/de62cf265dbe309f34f144a6cdbca9240317727e
- https://git.kernel.org/stable/c/f2d4f025b67fcbfb2bbbadd3b5a6a43c4b436514
- https://git.kernel.org/stable/c/f93e8039e6fd54a3c027c6184daf00b745b576a0