CVE-2026-86145
Publication date 5 September 2026
Last updated 3 November 2026
Ubuntu priority
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).
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| pcre2 | 26.10 stonking |
Fixed in 10.46-1ubuntu1
|
| 26.04 LTS resolute |
Fixed in 10.46-1ubuntu0.1
|
|
| 24.04 LTS noble |
Fixed in 10.42-4ubuntu2.2
|
|
| 22.04 LTS jammy |
Fixed in 10.39-3ubuntu0.2
|
|
| 20.04 LTS focal |
Fixed in 10.34-7ubuntu0.1+esm1
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
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CVSS version: CVSS v3.0
Base score
8.2 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
References
Related Ubuntu Security Notices (USN)
- USN-8974-1
- PCRE2 vulnerabilities
- 3 November 2026