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Fencer Vulns
medium 6.1

CVE-2026-6861 json

Emacs: emacs: memory corruption vulnerability when processing svg css

published 2026-04-22 6 mo ago modified 2026-11-05 3 d ago also EUVD-2026-24955

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

A flaw was found in GNU Emacs. This vulnerability, a memory corruption issue, occurs when Emacs processes specially crafted SVG (Scalable Vector Graphics) CSS (Cascading Style Sheets) data. A local user could exploit this by convincing a victim to open a malicious SVG file, which may lead to a denial of service (DoS) or potentially information disclosure.

Patch / fix

  • emacs Debian 13 1:30.1+1-6+deb13u1
  • emacs Debian 14 1:30.2+1-3

debian advisories DEBIAN-CVE-2026-6861

  • emacs Ubuntu Pro 24.04 LTS 1:29.3+1-1ubuntu2+esm4
  • emacs Ubuntu Pro 26.04 LTS 1:30.2+1-2ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2026-6861

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

  • emacs openSUSE Tumbleweed 30.2-8.1

opensuse advisories openSUSE-SU-2026:10619-1

  • emacs Azure Linux 3.0 29.4-4

azure linux advisories AZL-84638

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

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-2026-6861 updated cvss 6.1

emacs: Emacs: Memory corruption vulnerability when processing SVG CSS

  • Red Hat Enterprise Linux 6 emacs, emacs-el, emacs-nox, emacs-common Red Hat Enterprise Linux 7 emacs, emacs-el, emacs-nox, emacs-common, emacs-terminal, emacs-filesystem Red Hat Enterprise Linux 8 emacs, emacs-nox, emacs-lucid, emacs-common, emacs-terminal, emacs-filesystem Red Hat Enterprise Linux 9 emacs, emacs-nox, emacs-lucid, emacs-common, emacs-filesystem Red Hat Enterprise Linux 10 emacs
    under investigation

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

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.