HIGH 8.2 Microsoft

CVE-2026-86145

PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).

Microsoft Security Update 2026-Sep: PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).

Affected Products

References

Published: 2026-09-08 · Source: Microsoft · Feed updated: 2026-10-20
This high severity vulnerability with a CVSS score of 8.2 was published on 2026-09-08 via Microsoft. Affected: azl3 pcre2 10.42-3 on Azure Linux 3.0.
vulnfeed aggregates 17028 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.