CVE-2021-31292
Published Jul 26, 2021 · Updated Oct 23, 2026 · Also known as PYSEC-2021-877
Original summary
Normalized public record · Updated Oct 23, 2026
An integer overflow in CrwMap::encode0x1810 of Exiv2 0.27.3 allows attackers to trigger a heap-based buffer overflow and cause a denial of service (DOS) via crafted metadata.
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
An integer overflow in CrwMap::encode0x1810 of Exiv2 0.27.3 allows attackers to trigger a heap-based buffer overflow and cause a denial of service (DOS) via crafted metadata.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- PYSEC-2021-877
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- GitHub advisory ↗
- DSA-4958 ↗
- FEDORA-2021-399f869889 ↗
- FEDORA-2021-cbaef8e2d5 ↗
- [debian-lts-announce] 20210830 [SECURITY] [DLA 2750-1] exiv2 security update ↗
- GLSA-202312-06 ↗
Record history
Published Jul 26, 2021 · Last refreshed Oct 23, 2026