CVE-2026-86145
Published: September 8, 2026Last modified: September 17, 2026
Description
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).
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.2 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | HIGH |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | pcre2 | Unknown (10.40-r1) |
| 25 LTS | pcre2 | Unknown (10.43-r1) | |
| Stream | pcre2 | Fixed (10.48-r0) | |
| Hardened Containers | 23 LTS | pcre2 | Unknown (10.40-r1) |
| 25 LTS | pcre2 | Unknown (10.43-r1) | |
| Stream | pcre2 | Unknown (10.40-r1) |