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Fencer Vulns
high 7.0

CVE-2023-1476 json

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

published 2023-11-03 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-23724

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux linux_kernel 5.14
  • kpatch-patch-4_18_0-425_3_1 RHEL 8 1-6.el8
  • kpatch-patch-4_18_0-425_10_1 RHEL 8 1-4.el8_7
  • kpatch-patch-4_18_0-425_13_1 RHEL 8 1-2.el8_7

red hat advisories RHSA-2023:1659

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-1476 updated cvss 7.0

kpatch: mm/mremap.c: incomplete fix for CVE-2022-41222

  • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-425_3_1 1-6.el8, kpatch-patch-4_18_0-425_10_1 1-4.el8_7, kpatch-patch-4_18_0-425_13_1 1-2.el8_7
    fixed: vendor fix RHSA-2023:1659

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.