Strix
63.9K

CVE-2026-89852

Unknown

Last modified

CVE-2026-89852 is a vulnerability of currently unknown severity. 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.

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 4d4df1932b6b116aecc81039066fec27f2050762, < f8fc5cc6b3284506c6ab83c822c48133377668bb; >= 4d4df1932b6b116aecc81039066fec27f2050762, < f29695b1138ae2539c5cd6cdaba9b1b072aaa81a; >= 4d4df1932b6b116aecc81039066fec27f2050762, < 13d645a2cdb224d27205368f3e3c68bb160daf97; >= 4d4df1932b6b116aecc81039066fec27f2050762, < 2f847f06bb223aa895eea91fc9e5e2d6314038eb; >= 4d4df1932b6b116aecc81039066fec27f2050762, < 1f49e861c18caf8eef7f0ad9a2c5034f88a6ba79; >= 4d4df1932b6b116aecc81039066fec27f2050762, < e6cfb1ee18336aab41a0941d6d3ea5009aaafc05; >= 4d4df1932b6b116aecc81039066fec27f2050762, < 9f31de4d07e4cde91dfc24522993a5fbb4d67083; >= 4d4df1932b6b116aecc81039066fec27f2050762, < 9efaa782845b4d5fb3e01242be0d06ebc7428d8f
LinuxLinux2.6.26

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89852?
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.
How severe is CVE-2026-89852?
Severity scoring for CVE-2026-89852 is pending analysis.
How do I fix CVE-2026-89852?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-89852?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST