Medium [CVE-2026-89158] Out-of-bounds write via integer overflow on 32-bit platforms
This medium-severity Red Hat Linux advisory covers CVE-2026-89158 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8.
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Summary
A flaw was found in PCRE2. On 32-bit platforms, an integer overflow in the `pcre2_compile_32` function can lead to an out-of-bounds write.
This vulnerability could allow a remote attacker to achieve a high integrity impact and a low availability impact, potentially leading to data corruption or denial of service. While exploitable over the network without requiring user interaction or privileges, the high attack complexity reduces its overall severity.
Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L). Weakness: CWE-787.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Red Hat OpenShift Container Platform 4. Red Hat lists Red Hat Hardened Images as not affected.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: bootc; Red Hat package: mariadb10.11; Red Hat package: mariadb11.8; Red Hat package: mingw-pcre2; and 1 more.
Affected products named by the advisory: Red Hat package: pcre2.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 29 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 29 minutes ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 29 minutes ago·verify at source
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