Description
In PCRE2 before 10.48, pcre2_serialize_encode might disclose two bytes to an adversary, typically in a situation where the access available to the adversary is already unsafe.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PCRE | PCRE2 | 10.45 – < 10.48 | 10.48 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pcre2 | 10.48-1 | — |
| Debian 13 | pcre2 | 10.46-1~deb13u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | pcre2 | 10.46-1ubuntu1 | USN-8974-1 |
| Ubuntu 26.04 LTS | pcre2 | 10.46-1ubuntu0.1 | USN-8974-1 |
| Ubuntu 24.04 LTS | pcre2 | 10.42-4ubuntu2.2 | USN-8974-1 |
| Ubuntu 22.04 LTS | pcre2 | 10.39-3ubuntu0.2 | USN-8974-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | pcre2 | 10.34-7ubuntu0.1+esm1 | USN-8974-1 |
| Ubuntu Pro 18.04 LTS | pcre2 | 10.31-2ubuntu0.1~esm2 | USN-8974-1 |
| Ubuntu Pro 16.04 LTS | pcre2 | 10.21-1ubuntu0.1~esm1 | USN-8974-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | pcre2 +6 | 10.48-0.1.hum1 | RHSA-2026:67534 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | pcre2 | 10.45-160000.4.1 | SUSE-SU-2026:23906-1 |
| SLES 16.0 | pcre2 | 10.45-160000.4.1 | SUSE-SU-2026:23906-1 |
| SLE Micro 6.2 | pcre2 | 10.45-160000.4.1 | SUSE-SU-2026:23891-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | pcre2 | 10.45-160000.4.1 | openSUSE-SU-2026:21938-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pcre2 | 10.48-r0 | — |
| Alpine v3.23 | pcre2 | 10.48-r0 | — |
| Alpine v3.22 | pcre2 | 10.46-r1 | — |
Advisories 6
- WID-SEC-2026-3334 PCRE2 (Perl Compatible Regular Expressions): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- USN-8974-1 pcre2 vulnerabilities Ubuntu Security Notices (USN) · Nov 4, 2026
- RHSA-2026:67534 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- SUSE-SU-2026:23906-1 Security update for pcre2 SUSE / openSUSE Security Updates · Sep 30, 2026
- SUSE-SU-2026:23891-1 Security update for pcre2 SUSE / openSUSE Security Updates · Sep 30, 2026
- openSUSE-SU-2026:21938-1 Security update for pcre2 SUSE / openSUSE Security Updates · Sep 25, 2026