What’s Vulnerable › Vulnerabilities

CVE-2023-1476: Kpatch: mm/mremap.c: incomplete fix for cve-2022-41222

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-03 · updated 2026-06-17
• Weakness: CWE-416

Description

A use-after-free flaw was found in the Linux kernel’s mm/mremap memory address space accounting source code. This issue occurs due to a race condition between rmap walk and mremap, allowing a local user to crash the system or potentially escalate their privileges on the system.

Affected products

• Linux kernel: before 5.14 — fixed in 5.14
• Red Hat Enterprise Linux: 8.0
• RedHat Enterprise Linux Eus: 8.8
• RedHat Enterprise Linux For Power Little Endian: 8.0_ppc64le
• RedHat Enterprise Linux For Power Little Endian Eus: 8.8_ppc64le
• RedHat Enterprise Linux Server Tus: 8.8

How to fix

Upgrade to a fixed version: Linux kernel 5.14. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2023:1659
• https://access.redhat.com/security/cve/CVE-2023-1476
• https://bugzilla.redhat.com/show_bug.cgi?id=2176035
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=97113eb39fa7972722ff490b947d8af023e1f6a2
• https://access.redhat.com/errata/RHSA-2023:1659
• https://access.redhat.com/security/cve/CVE-2023-1476
• https://bugzilla.redhat.com/show_bug.cgi?id=2176035
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=97113eb39fa7972722ff490b947d8af023e1f6a2

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