Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state() The mbx_cmd_t is allocated on the stack but left uninitialized. qla2x00_mailbox_command() has several early-return paths (PCI permanent failure, device failed, EEH busy, ISP abort pending, mailbox access timeout, purge mbox) that return without writing the input mailbox registers back into mcp->mb[]. qla2x00_get_firmware_state() then unconditionally copies mcp->mb[1..6] (and mb[12]) into the caller's states[] array regardless of the return value. On such a failure the copied values are uninitialized kernel stack memory, which is then exposed to userspace via the fw_state and mpi_fw_state sysfs handlers. Zero the mailbox struct so a failed query yields deterministic zeroed state instead of leaking stack contents.
References
- https://git.kernel.org/stable/c/13d645a2cdb224d27205368f3e3c68bb160daf97
- https://git.kernel.org/stable/c/1f49e861c18caf8eef7f0ad9a2c5034f88a6ba79
- https://git.kernel.org/stable/c/2f847f06bb223aa895eea91fc9e5e2d6314038eb
- https://git.kernel.org/stable/c/9efaa782845b4d5fb3e01242be0d06ebc7428d8f
- https://git.kernel.org/stable/c/9f31de4d07e4cde91dfc24522993a5fbb4d67083
- https://git.kernel.org/stable/c/e6cfb1ee18336aab41a0941d6d3ea5009aaafc05
- https://git.kernel.org/stable/c/f29695b1138ae2539c5cd6cdaba9b1b072aaa81a
- https://git.kernel.org/stable/c/f8fc5cc6b3284506c6ab83c822c48133377668bb
FAQ
What is CVE-2026-89852?
CVE-2026-89852 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state() The mbx_cmd_t is allocated on the stack but left uninitialized....
How severe is CVE-2026-89852?
CVSS scoring is not yet available for CVE-2026-89852. Check NVD for updates.
Is there a patch for CVE-2026-89852?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.