Out-of-bounds write in Linux kernel - CVE-2026-98232

Vulnerability details

The vulnerability allows an attacker with physical access to execute arbitrary code and disclose sensitive information.

The vulnerability exists due to out-of-bounds reads and writes in scsi_cdl_enable() in drivers/scsi/scsi.c when processing target-supplied MODE SENSE length fields. An attacker with physical access can supply crafted MODE SENSE responses through a USB storage device that identifies as an ATA device and advertises CDL support to execute arbitrary code and disclose sensitive information.

Exploitation is reachable during automatic device scanning without a filesystem mount or userspace access to the block device. Code execution was demonstrated using a build-specific, one-vCPU QEMU/Raw Gadget proof with QEMU-only multi-UDC allocator sampling, while KASLR and NX were enabled.

Affected software

How to mitigate CVE-2026-98232

External References

• https://git.kernel.org/stable/c/39491a1ae93054fea10b4030180e5c797b2c0343
• https://git.kernel.org/stable/c/3d676e458fe0c566f5a62753dc696b6a862fc412
• https://git.kernel.org/stable/c/60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4
• https://git.kernel.org/stable/c/6233d0b3ef4623df0d6934dc8b93b161e9854f6b
• https://git.kernel.org/stable/c/99a6e4a9176da456904b67dcbae6e77d122782b7

Related Security Bulletins

• Out-of-bounds write in Linux kernel scsi driver
• Debian update for linux