CVE-2023-53479

In the Linux kernel, the following vulnerability has been resolved: cxl/acpi: Fix a use-after-free in cxl_parse_cfmws() KASAN and KFENCE detected an user-after-free in the CXL driver. This happens in the cxl_decoder_add() fail path. KASAN prints the following error: BUG: KASAN: slab-use-after-free in cxl_parse_cfmws (drivers/cxl/acpi.c:299) This happens in cxl_parse_cfmws(), where put_device() is called, releasing cxld, which is accessed later. Use the local variables in the dev_err() instead of pointing to the released memory. Since the dev_err() is printing a resource, change the open coded print format to use the %pr format specifier.

Score

CVSS 3.1 7.8 High

Status

Analyzed - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2025-10-01

Last modified

2026-05-11

Weaknesses

CWE-416

Affected products

• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/316db489647b8ddc381682597e89787eac61a278
• https://git.kernel.org/stable/c/4cf67d3cc9994a59cf77bb9c0ccf9007fe916afe
• https://git.kernel.org/stable/c/748fadc08bcbdaf573b34d9784bb3dbd87441dbf