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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kpatch-patch-4_18_0-425_10_1 | 1-4.el8_7 | RHSA-2023:1659 |
| RHEL 8 | kpatch-patch-4_18_0-425_13_1 | 1-2.el8_7 | RHSA-2023:1659 |
| RHEL 8 | kpatch-patch-4_18_0-425_3_1 | 1-6.el8 | RHSA-2023:1659 |
Advisories 2
- RHSA-2023:1659 Red Hat Security Advisory: kpatch-patch security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- WID-SEC-2023-2821 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 16, 2024