CVE-2026-103111: pcre pcre2 Out-of-bounds Write
CVSS: 7.6v3.1HighAwaiting analysis
AliasesALPINE-CVE-2026-103111RHSA-2026:74972UBUNTU-CVE-2026-103111DEBIAN-CVE-2026-103111openSUSE-SU-2026:12158-1
Published 30-09-2026Last modified 03-10-2026
Vulnerability summary
CVE-2026-103111 is a high (CVSS 7.6) Out-of-bounds Write vulnerability in pcre pcre2. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.1% of scored vulnerabilities.
CVSS score
7.6/10
010
High · v3.1 (CVE.org)EPSS score
0.21%
0%100%
Low · Change unavailableKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8Timeline
- 30-09-2026PublishedVulnerability first disclosed.
- 03-10-2026Last modifiedVulnerability information updated.
Description
PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.
CVSS metrics
6 scores · 6 sources · 1 versionHigh 7.6Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:LSourcesAll 6 agree
- OSV · AlpineEcosystem advisory · calculated7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
- OSV · Red hatEcosystem advisory · calculated7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
- OSV · UbuntuEcosystem advisory · calculated7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
- OSV · DebianEcosystem advisory · calculated7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
- NVDNIST7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
11%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
30-09-202621-10-2026
EPSS score0.21%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat7 products
- pcre2< 0:10.49-0.1.hum1
- pcre2-devel< 0:10.49-0.1.hum1
- pcre2-static< 0:10.49-0.1.hum1
- pcre2-syntax< 0:10.49-0.1.hum1
- pcre2-tools< 0:10.49-0.1.hum1
Alpine1 product
- pcre2< 10.43-r1 | < 10.46-r1 | < 10.49-r0
Debian1 product
- pcre2< 10.42-1+deb12u2 | < 10.46-1~deb13u3 | < 10.48-3.1
Opensuse1 product
- pcre2&distro=openSUSE Tumbleweed< 10.49-2.1
Pcre1 product
- pcre2< 10.49
Ubuntu1 product
- pcre2All versions (No fix recorded)
6 vendors · 12 products
References
14 links
- images.redhat.comARTICLE
