CVE-2024-42235

s390/mm: Add NULL pointer check to crst_table_free() base_crst_free()

State: Published
Severity: 7.8 High
Published: Aug 7, 2024
Updated: Aug 5, 2026
Reserved: Jul 30, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6326c26c1514757242829b292b26eac589013200 to before 794fa52b94637d6b2e8c9474fbe3983af5c9f046Affected 6326c26c1514757242829b292b26eac589013200 to before f80bd8bb6f380bc265834c46058d38b34174813eAffected 6326c26c1514757242829b292b26eac589013200 to before b5efb63acf7bddaf20eacfcac654c25c446eabe8Affected
LinuxLinux	6.6Affected before 6.6Not affected 6.6.41 through 6.6.Not affected 6.9.10 through 6.9.Not affected 6.10 and laterNot affected

References

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