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Vulnerability record · CVE-2026-23306 · published 25 March 2026

CVE-2026-23306: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 98.1% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/227ff4af00abc40b95123cc27ee8079069dcd8d7 Patch
https://git.kernel.org/stable/c/38353c26db28efd984f51d426eac2396d299cca7 Patch
https://git.kernel.org/stable/c/824a7672e3540962d5c77d4c6666254d7aa6f0b3 Patch
https://git.kernel.org/stable/c/8b00427317ba7b7ec91252b034009f638d0f311b Patch
https://git.kernel.org/stable/c/c5dc39f8ae055520fd778b7fb0423f11586f15c4 Patch
https://git.kernel.org/stable/c/ebbb852ffbc952b95ddb7e3872b67b3e74c6da47 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-23306), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.