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,…
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/34cf99c250d5cd2530b93a57b0de31d3aaf8685bPatch
- https://git.kernel.org/stable/c/d2dfbc0e3b7a04c2d941421a958dc31c897fb204Patch
- https://git.kernel.org/stable/c/eef16bfdb212da60f5144689f2967fb25b051a2bPatch
- https://git.kernel.org/stable/c/34cf99c250d5cd2530b93a57b0de31d3aaf8685bPatch
- https://git.kernel.org/stable/c/d2dfbc0e3b7a04c2d941421a958dc31c897fb204Patch
- https://git.kernel.org/stable/c/eef16bfdb212da60f5144689f2967fb25b051a2bPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.