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Fencer Vulns
medium 5.5

CVE-2021-37616 json

Null pointer dereference in Exiv2::Internal::resolveLens0x8ff

published 2021-08-09 5 y ago modified 2026-08-13 2 mo ago also EUVD-2021-24174 , JLSEC-2026-1307

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A null pointer dereference was found in Exiv2 versions v0.27.4 and earlier. The null pointer dereference is triggered when Exiv2 is used to print the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when printing the interpreted (translated) data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p t` or `-P t`). The bug is fixed in version v0.27.5.

Patch / fix

  • exiv2 Debian 14, Debian 13, Debian 12 0.27.5-1

debian advisories DEBIAN-CVE-2021-37616

  • exiv2 Ubuntu 20.04 LTS 0.27.2-8ubuntu2.6
  • exiv2 Ubuntu 22.04 LTS 0.27.3-3ubuntu4
  • exiv2 Ubuntu Pro 16.04 LTS 0.25-2.1ubuntu16.04.7+esm4

ubuntu advisories UBUNTU-CVE-2021-37616

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • exiv2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 0.27.5-r0

alpine advisories ALPINE-CVE-2021-37616

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • exiv2 CBL-Mariner 2.0 0.27.5-1

azure linux advisories AZL-7219

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • exiv2 Arch Linux 0.27.5-1

arch linux advisories AVG-2265

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-37616 updated cvss 5.5

exiv2: NULL pointer dereference in Exiv2::Internal::resolveLens0x8ff

  • Red Hat Enterprise Linux 6 exiv2, exiv2-libs Red Hat Enterprise Linux 7 exiv2, exiv2-libs, compat-exiv2-023, compat-exiv2-026
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 exiv2, exiv2-libs, compat-exiv2-026
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 exiv2, exiv2-libs
    affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
OSV 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Exiv2_jll
all versions
 no fix listed

Affected products

  • Exiv2 exiv2

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.