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Vulnerability record · CVE-2023-23005 · published 1 March 2023

CVE-2023-23005: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

In the Linux kernel before 6.2, mm/memory-tiers.c misinterprets the alloc_memory_type return value (expects it to be NULL in the error case, whereas it is actually an error pointer). NOTE: this is disputed by third parties because there are no realistic cases in which a user can cause the alloc_memory_type error case to be reached.

5.5 CVSS 3.1 Medium EPSS 0.27% · top 82.9% CWE-476 · NULL pointer dereference
5.5CVSS 3.1 base score
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel before 6.2, mm/memory-tiers.c misinterprets the alloc_memory_type return value (expects it to be NULL in the error case, whereas it is actually an error pointer). NOTE: this is disputed by third parties because there are no realistic cases in which a user can cause the alloc_memory_type error case to be reached.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.suse.com/show_bug.cgi?id=1208844#c2 Issue TrackingPatchThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2 Mailing ListPatchRelease Notes
https://github.com/torvalds/linux/commit/4a625ceee8a0ab0273534cb6b432ce6b331db5ee Patch
https://bugzilla.suse.com/show_bug.cgi?id=1208844#c2 Issue TrackingPatchThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2 Mailing ListPatchRelease Notes
https://github.com/torvalds/linux/commit/4a625ceee8a0ab0273534cb6b432ce6b331db5ee Patch

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Source: NIST National Vulnerability Database (record CVE-2023-23005), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.