CVE-2021-30499: fedoraproject fedora
CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2021-30499DEBIAN-CVE-2021-30499
Published 26-05-2021Last modified 03-11-2025
Vulnerability summary
CVE-2021-30499 is a high (CVSS 7.8) vulnerability in fedoraproject fedora. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
1.24%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 9 · Related 6Timeline
- 26-05-2021PublishedVulnerability first disclosed.
- 03-11-2025Last modifiedVulnerability information updated.
Description
A flaw was found in libcaca. A buffer overflow of export.c in function export_troff might lead to memory corruption and other potential consequences.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.24%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
0.00 pp
From 1.24% on 20-09-2026
20-09-202620-10-2026
EPSS score1.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundLibcaca
Maturity: poc
Weaknesses
CWE · root cause- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Debian1 product
- libcaca< 0.99.beta19-3
Fedoraproject1 product
- fedoraEOL34 | 35 | 36
Libcaca_project1 product
- libcacana
Ubuntu1 product
- libcaca< 0.99.beta18-1ubuntu5.1+esm2 | < 0.99.beta19-2ubuntu0.16.04.2+esm1 | < 0.99.beta19-2ubuntu0.18.04.3 | < 0.99.beta19-2.1ubuntu1.20.04.2 | < 0.99.beta19-2.2ubuntu3
4 vendors · 4 products
