Use After Free in Linux
CVE-2023-52576
In the Linux kernel, the following vulnerability has been resolved: x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer() The code calling ima_free_kexec_buffer() runs long after the memblock allocator has already been torn down, potentially resulting in a use after free in memblock_isolate_range(). With KASAN or KFENCE, this use after free will result in a BUG from the idle task, and a subsequent kernel panic. Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid that bug.
Vulnerability class: Use-After-Free
EPSS: 0.002 (12.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux — versions fee3ff99bc67604fba77f19da0106f3ec52b1956, 5.13, 0
- Linux Linux_kernel — versions 6.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2023-52576?
- CVE-2023-52576 is a medium-severity vulnerability in Linux, classified under Use After Free. CVSS score: 5.5/10. Published 2024-03-02.
- How severe is CVE-2023-52576?
- Medium severity. CVSS v3 base score is 5.5 out of 10.