CVE-2024-42235

medium

Description

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Add NULL pointer check to crst_table_free() base_crst_free() crst_table_free() used to work with NULL pointers before the conversion to ptdescs. Since crst_table_free() can be called with a NULL pointer (error handling in crst_table_upgrade() add an explicit check. Also add the same check to base_crst_free() for consistency reasons. In real life this should not happen, since order two GFP_KERNEL allocations will not fail, unless FAIL_PAGE_ALLOC is enabled and used.

References

https://git.kernel.org/stable/c/f80bd8bb6f380bc265834c46058d38b34174813e

https://git.kernel.org/stable/c/b5efb63acf7bddaf20eacfcac654c25c446eabe8

https://git.kernel.org/stable/c/794fa52b94637d6b2e8c9474fbe3983af5c9f046

Details

Source: Mitre, NVD

Published: 2024-08-07

Updated: 2024-08-08

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium