CVE-2019-19203: fedoraproject fedora Out-of-bounds Read
Vulnerability summary
CVE-2019-19203 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in fedoraproject fedora. EPSS estimates a 4.05% chance of exploitation in the next 30 days, higher than 90.6% of scored vulnerabilities. 2 public exploits are recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 10 · Related 3Timeline
- 21-11-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is dereferenced without checking if it passed the end of the matched string. This leads to a heap-based buffer over-read.
CVSS metrics
4 scores · 3 sources · 2 versions- 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
EPSS trend
Probability
4.05%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.05% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
2 foundOniguruma
Maturity: poc
Cve 2019 19203
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- libonig< 6.9.4-1
Fedoraproject1 product
- fedoraEOL30 | 31
Oniguruma_project1 product
- onigurumaEOL≥ 6.0.0, < 6.9.4 | 6.9.4:rc1
Ubuntu1 product
- libonig< 5.9.1-1ubuntu1.1+esm3 | < 5.9.6-1ubuntu0.1+esm3 | < 6.7.0-1ubuntu0.1~esm2
4 vendors · 4 products
