CVE-2026-23306

Summary

In the Linux kernel, the following vulnerability has been resolved:

scsi: pm8001: Fix use-after-free in pm8001_queue_command()

Commit e29c47fe8946 ("scsi: pm8001: Simplify pm8001_task_exec()") refactors pm8001_queue_command(), however it introduces a potential cause of a double free scenario when it changes the function to return -ENODEV in case of phy down/device gone state.

In this path, pm8001_queue_command() updates task status and calls task_done to indicate to upper layer that the task has been handled. However, this also frees the underlying SAS task. A -ENODEV is then returned to the caller. When libsas sas_ata_qc_issue() receives this error value, it assumes the task wasn't handled/queued by LLDD and proceeds to clean up and free the task again, resulting in a double free.

Since pm8001_queue_command() handles the SAS task in this case, it should return 0 to the caller indicating that the task has been handled.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe29c47fe8946cc732b0e0d393b65b13c84bb69d0 < ebbb852ffbc952b95ddb7e3872b67b3e74c6da47affected
LinuxLinuxe29c47fe8946cc732b0e0d393b65b13c84bb69d0 < 8b00427317ba7b7ec91252b034009f638d0f311baffected
LinuxLinuxe29c47fe8946cc732b0e0d393b65b13c84bb69d0 < c5dc39f8ae055520fd778b7fb0423f11586f15c4affected
LinuxLinuxe29c47fe8946cc732b0e0d393b65b13c84bb69d0 < 824a7672e3540962d5c77d4c6666254d7aa6f0b3affected
LinuxLinuxe29c47fe8946cc732b0e0d393b65b13c84bb69d0 < 227ff4af00abc40b95123cc27ee8079069dcd8d7affected
LinuxLinuxe29c47fe8946cc732b0e0d393b65b13c84bb69d0 < 38353c26db28efd984f51d426eac2396d299cca7affected
LinuxLinux5.18affected
LinuxLinux0 < 5.18unaffected
LinuxLinux6.1.167 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.77 <= 6.12.*unaffected
LinuxLinux6.18.17 <= 6.18.*unaffected
LinuxLinux6.19.7 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References