Bug 2420240 (CVE-2023-53803)

Summary: CVE-2023-53803 kernel: scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-09 01:02:36 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()

A fix for:

BUG: KASAN: slab-out-of-bounds in ses_enclosure_data_process+0x949/0xe30 [ses]
Read of size 1 at addr ffff88a1b043a451 by task systemd-udevd/3271

Checking after (and before in next loop) addl_desc_ptr[1] is sufficient, we
expect the size to be sanitized before first access to addl_desc_ptr[1].
Make sure we don't walk beyond end of page.
Comment 1 Alexander B 2025-12-10 08:07:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120943-CVE-2023-53803-0ff9@gregkh/T