CVE-2025-68745 scsi: qla2xxx: Clear cmds after chip reset
A race condition in the qla2xxx SCSI driver causes a kernel crash during chip reset, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68745?
CVE-2025-68745 is a critical vulnerability in Linux, published on 24 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Clear cmds after chip reset
Commit aefed3e5548f ("scsi: qla2xxx: target: Fix offline port handling and host reset handling") caused two problems:
1. Commands sent to FW, after chip reset got stuck and never freed as FW is not going to respond to them anymore.
2. BUG_ON(cmd->sg_mapped) in qlt_free_cmd(). Commit 26f9ce53817a ("scsi: qla2xxx: Fix missed DMA unmap for aborted commands") attempted to fix this, but introduced another bug under different circumstances when two different CPUs were racing to call qlt_unmap_sg() at the same time: BUG_ON(!valid_dma_direction(dir)) in dma_unmap_sg_attrs().
So revert "scsi: qla2xxx: Fix missed DMA unmap for aborted commands" and partially revert "scsi: qla2xxx: target: Fix offline port handling and host reset handling" at __qla2x00_abort_all_cmds.
Which versions are affected by CVE-2025-68745?
How do I fix CVE-2025-68745?
Apply the vendor's patch.
Is CVE-2025-68745 being exploited?
There is no known exploitation of CVE-2025-68745 in the wild and no public exploit code.
Sources
Also known as AZL-73087, BELL-CVE-2025-68745, DEBIAN-CVE-2025-68745, GHSA-vc2w-h9rc-mpxx, ROOT-OS-DEBIAN-11-CVE-2025-68745, ROOT-OS-DEBIAN-12-CVE-2025-68745 and 4 more.