CVE-2026-89161: Red Hat Memory corruption vulnerability in pcre2_jit_match
This Red Hat advisory covers CVE-2026-89161 in Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions and Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.
Key facts
- Vendor rating
- High, CVSS 7.4
- CISA KEV
- Not listed (catalogue checked )
- Affected
- < 10.48
- Fixed in
- pcre2-0:10.44-1.5.el10_2, pcre2-0:10.40-7.el9_8, pcre2-0:10.40-2.el9_2.1 and 15 more below
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
In PCRE2 before 10.48, pcre2_jit_match mishandles a previously copied subject being passed in as a context. An incorrect free operation can occur.
A flaw was found in PCRE2, a library for processing regular expressions. The `pcre2_jit_match` function, which handles just-in-time (JIT) compilation for regular expressions, incorrectly manages memory when processing certain inputs.
This memory corruption vulnerability could allow a local attacker to cause the application to crash, leading to a denial of service, or potentially execute unauthorized code. This is an Important memory corruption vulnerability in PCRE2's JIT compiler.
The high attack complexity and local attack vector reduce the overall risk, but the widespread use of PCRE2 and the potential for severe impact warrant the Important classification. Red Hat severity: Important — CVSS 7.4 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
Weakness: CWE-1341.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Hardened Images; Red Hat Update Infrastructure 5; Red Hat OpenShift Container Platform 4.
Text from the source record.
How to fix CVE-2026-89161
Upgrade to a fixed release named by Red Hat:
- pcre2-0:10.44-1.5.el10_2
- pcre2-0:10.40-7.el9_8
- pcre2-0:10.40-2.el9_2.1
- pcre2-0:10.40-5.el9_4.1
- pcre2-0:10.40-6.el9_6.1
- pcre2-main-10.48-0.1.hum1
- rhui5/cds-kubernetes-rhel9:1791978534
- rhui5/cds-rhel9:1791978528
- rhui5/haproxy-rhel9:1791978528
- rhui5/installer-rhel9:1791964013
- rhui5/rhua-rhel9:1791978693
- RHSA-2026:81522
- RHSA-2026:81532
- RHSA-2026:82876
- RHSA-2026:82875
- RHSA-2026:82845
- RHSA-2026:67534
- RHSA-2026:82939
Vendor guidance
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Support dates for the fixed release lines
- Red Hat Enterprise Linux 10: support ends
- Red Hat Enterprise Linux 4: support ended
- Red Hat Enterprise Linux 6: support ended
CVE-2026-89161 in other vendors' advisories
- Veeam: KB4825
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