CVE-2021-29623
Uninitialized variable bug in Exiv2
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
Exiv2 is a C++ library and a command-line utility to read, write, delete and modify Exif, IPTC, XMP and ICC image metadata. A read of uninitialized memory was found in Exiv2 versions v0.27.3 and earlier. Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. The read of uninitialized memory is triggered when Exiv2 is used to read the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to leak a few bytes of stack memory, if they can trick the victim into running Exiv2 on a crafted image file. The bug is fixed in version v0.27.4.
Timeline
ID reserved
By GitHub_M
- 44 days later
· 44 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Low3.6 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | Low3.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.1% · top 34% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.6.
Weakness
Affected products
References (7)
- https://github.com/Exiv2/exiv2/security/advisories/GHSA-6253-qjwm-3q4v (opens in a new tab)x_transferred
- https://github.com/Exiv2/exiv2/pull/1627 (opens in a new tab)x_transferred
- FEDORA-2021-d1d5a0bf0f (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-8253c78bd7 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-bdba47348c (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-8917c5d9d2 (opens in a new tab)vendor-advisoryx_transferred
- GLSA-202312-06 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-29623)Record last updated .