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 works
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).
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Sep 5, 2026
- Updated
- Sep 9, 2026
- EPSS
- 0.4% · 31th percentile
- CWE
- CWE-424
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.2 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · mitre
- 8.2
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.
PCRE PCRE2
- 10.32 and later · before 10.48affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | pcre2 | before 10.42-1+deb12u1 | 10.42-1+deb12u1 |
| Debian:13 | pcre2 | before 10.46-1~deb13u2 | 10.46-1~deb13u2 |
| Debian:14 | pcre2 | before 10.48-1 | 10.48-1 |
| openSUSE:Leap 16.0 | pcre2 | before 10.45-160000.4.1 | 10.45-160000.4.1 |
| Red Hat:hummingbird:1 | pcre2 | before 0:10.48-0.1.hum1 | 0:10.48-0.1.hum1 |
| Red Hat:hummingbird:1 | pcre2-devel | before 0:10.48-0.1.hum1 | 0:10.48-0.1.hum1 |
| Red Hat:hummingbird:1 | pcre2-static | before 0:10.48-0.1.hum1 | 0:10.48-0.1.hum1 |
| Red Hat:hummingbird:1 | pcre2-syntax | before 0:10.48-0.1.hum1 | 0:10.48-0.1.hum1 |
| Red Hat:hummingbird:1 | pcre2-tools | before 0:10.48-0.1.hum1 | 0:10.48-0.1.hum1 |
| Red Hat:hummingbird:1 | pcre2-utf16 | before 0:10.48-0.1.hum1 | 0:10.48-0.1.hum1 |
| Red Hat:hummingbird:1 | pcre2-utf32 | before 0:10.48-0.1.hum1 | 0:10.48-0.1.hum1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | pcre2 | before 10.42-150600.3.3.1 | 10.42-150600.3.3.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | pcre2 | before 10.34-1.16.1 | 10.34-1.16.1 |
| SUSE:Linux Micro 6.0 | pcre2 | before 10.42-3.1 | 10.42-3.1 |
| SUSE:Linux Micro 6.1 | pcre2 | before 10.42-slfo.1.1_2.1 | 10.42-slfo.1.1_2.1 |
Same product
pcre: all recordsOther highest-scoring records for the same primary product.
- CVE-2015-3210Heap-based buffer overflow in PCRE 8.34 through 8.37 and PCRE2 10.10 allows remote attackers to execute arbitrary code via a crafted regular42Plan
- CVE-2017-8786pcre2test.c in PCRE2 10.23 allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified ot40Plan
- CVE-2017-8399PCRE2 before 10.30 has an out-of-bounds write caused by a stack-based buffer overflow in pcre2_match.c, related to a "pattern with very many40Plan
- CVE-2022-1587An out-of-bounds read vulnerability was discovered in the PCRE2 library in the get_recurse_data_length() function of the pcre2_jit_compile.c37Monitor
- CVE-2022-1586An out-of-bounds read vulnerability was discovered in the PCRE2 library in the compile_xclass_matchingpath() function of the pcre2_jit_compi37Monitor
- CVE-2015-3217PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10 mishandle group empty matches, which might allow remote attackers to cause a denial of servi32Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| azl3 pcre2 10.42-3 on Azure Linux 3.0 | 10.48-1 | Microsoft (MSRC) |
| debian:pcre2 | 10.42-1+deb12u1 · Debian:12 | Package registry (OSV) |
| opensuse:pcre2 | 10.45-160000.4.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| red hat:pcre2 | 0:10.48-0.1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:pcre2-devel | 0:10.48-0.1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:pcre2-static | 0:10.48-0.1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:pcre2-syntax | 0:10.48-0.1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:pcre2-tools | 0:10.48-0.1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:pcre2-utf16 | 0:10.48-0.1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:pcre2-utf32 | 0:10.48-0.1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| suse:pcre2 | 10.42-slfo.1.1_2.1 · SUSE:Linux Micro 6.1 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- low · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- Low
Weakness class (CWE)
CWE-424 · Improper Protection of Alternate PathCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48
- github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf
- www.openwall.com/lists/oss-security/2026/09/05/3
Vendor advisories and official records. Exploit/PoC links are deliberately left out.