CVE-2023-53609 scsi: Revert "scsi: core: Do not increase scsi_device's iorequest_cnt if dispatch failed"

What is CVE-2023-53609?

CVE-2023-53609 is a high-severity vulnerability in Linux kernel, published on 4 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

scsi: Revert "scsi: core: Do not increase scsi_device's iorequest_cnt if dispatch failed"

The "atomic_inc(&cmd->device->iorequest_cnt)" in scsi_queue_rq() would cause kernel panic because cmd->device may be freed after returning from scsi_dispatch_cmd().

This reverts commit cfee29ffb45b1c9798011b19d454637d1b0fe87d.

Which versions are affected by CVE-2023-53609?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-53609?

Apply the vendor's patch.

Is CVE-2023-53609 being exploited?

There is no known exploitation of CVE-2023-53609 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-53609, DEBIAN-CVE-2023-53609, GHSA-3r4v-9hh7-vrpx, ROOT-OS-UBUNTU-2204-CVE-2023-53609, UBUNTU-CVE-2023-53609.