CVE-2021-33294: elfutils_project elfutils Infinite Loop
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-33294DEBIAN-CVE-2021-33294
Published 18-07-2023Last modified 14-10-2026
Vulnerability summary
CVE-2021-33294 is a medium (CVSS 5.5) Infinite Loop vulnerability in elfutils_project elfutils. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 25.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.33%
0%100%
Low · +0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 18-07-2023PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
In elfutils 0.183, an infinite loop was found in the function handle_symtab in readelf.c .Which allows attackers to cause a denial of service (infinite loop) via crafted file.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.33%
Chance of exploitation in the next 30 days
Percentile
25%
Versus all other CVEs
30-day change
+0.04 pp
From 0.29% on 18-09-2026
18-09-202618-10-2026
EPSS score0.33%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (sourceware.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- elfutils< 0.185-2
Elfutils_project1 product
- elfutils0.183
Ubuntu1 product
- elfutils< 0.158-0ubuntu5.3+esm1 | < 0.165-3ubuntu1.2+esm1 | < 0.170-0.4ubuntu0.1+esm1 | < 0.176-1.1ubuntu0.1
3 vendors · 3 products
