CVE-2019-20454: fedoraproject fedora Out-of-bounds Read
Vulnerability summary
CVE-2019-20454 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in fedoraproject fedora. EPSS estimates a 1.56% chance of exploitation in the next 30 days, higher than 74.8% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 4 · Related 2Timeline
- 14-02-2020PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.
CVSS metrics
8 scores · 5 sources · 3 versions- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.1MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.1MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.56%
Chance of exploitation in the next 30 days
Percentile
75%
Versus all other CVEs
30-day change
0.00 pp
From 1.56% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.php.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Redhat10 products
- pcre2< 0:10.32-2.el8
- pcre2-debuginfo< 0:10.32-2.el8
- pcre2-debugsource< 0:10.32-2.el8
- pcre2-devel< 0:10.32-2.el8
- pcre2-tools< 0:10.32-2.el8
Debian1 product
- pcre2< 10.34-1
Fedoraproject1 product
- fedoraEOL31
Mageia1 product
- pcre2< 10.33-1.2.mga7
Pcre1 product
- pcre2≥ 10.31, < 10.34
Splunk1 product
- universal_forwarder≥ 8.2.0, < 8.2.12 | ≥ 9.0.0, < 9.0.6 | 9.1.0
Ubuntu1 product
- pcre2All versions (No fix recorded)
7 vendors · 16 products
