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Vulnerabilities

Vulnerability · CVE-2021-33294

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.

Published Jul 18, 2023 · catalog updated Oct 14, 2026 · elfutils project

Check if you run it

No confirmed exploitation is on record for CVE-2021-33294. EPSS is 0.33%. Act only if a listed version of elfutils project is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Not established
Affected products
cpe elfutils project/elfutils

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe elfutils project/elfutils0.183

How to fix CVE-2021-33294

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-33294. EPSS is 0.33%. Act only if a listed version of elfutils project is installed.

Which versions are affected?

Compare what you have installed with elfutils project/elfutils 0.183. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-835: Infinite Loop. EPSS 0.33%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 18, 2023 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2021-33294

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-33294

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2021-33294

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.