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Fencer Intel
critical 9.8

CVE-2018-25014 json

A use of uninitialized value was found in libwebp in versions before 1.0.1 in ReadSymbol().

published 2021-05-21 5 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13795

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

A use of uninitialized value was found in libwebp in versions before 1.0.1 in ReadSymbol().

Patch / fix

  • webmproject libwebp 1.0.1
  • libwebp Debian 14, Debian 13, Debian 12 0.6.1-2.1

debian advisories DEBIAN-CVE-2018-25014

  • libwebp Ubuntu 18.04 LTS 0.6.1-2ubuntu0.18.04.1
  • libwebp Ubuntu 20.04 LTS 0.6.1-2ubuntu0.20.04.1
  • libwebp Ubuntu Pro 14.04 LTS 0.4.0-4ubuntu0.1~esm1
  • libwebp Ubuntu Pro 16.04 LTS 0.4.4-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2018-25014

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

  • libwebp RHEL 8 1.0.0-5.el8
  • qt5-qtimageformats RHEL 7 5.9.7-2.el7_9

red hat advisories RHSA-2021:4231RHSA-2021:2328

  • libwebp AlmaLinux 8 1.0.0-5.el8

almalinux advisories ALSA-2021:4231

  • libwebp Rocky Linux 8 1.0.0-5.el8

rocky linux advisories RLSA-2021:4231

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-2018-25014 updated cvss 9.8

libwebp: use of uninitialized value in ReadSymbol()

  • Red Hat Enterprise Linux 7 libwebp, libwebp-java, libwebp-tools
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) libwebp 1.0.0-5.el8
    fixed: vendor fix RHSA-2021:4231
  • Red Hat Enterprise Linux Server (v. 7) qt5-qtimageformats 5.9.7-2.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) qt5-qtimageformats-doc 5.9.7-2.el7_9 Red Hat Enterprise Linux Workstation (v. 7) qt5-qtimageformats 5.9.7-2.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) qt5-qtimageformats-doc 5.9.7-2.el7_9
    fixed: vendor fix RHSA-2021:2328
  • Red Hat Enterprise Linux 7 firefox, thunderbird Red Hat Enterprise Linux 8 firefox, thunderbird Red Hat Enterprise Linux 9 libwebp, libwebp-tools
    not affected: vulnerable code not present

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

2.23% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a libwebp

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource

References

Sources

Fencer Intel 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.