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CVE-2026-6861VulnerabilityPublished Updated

SUSE xemacs21 · Security update for emacs

Affects SUSE xemacs21Source GCVE Database

0
Authoritative record:CVE-2026-6861· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium · fixed in Ubuntu package updates : update the Ubuntu emacs package when convenient.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1:29.3+1-1ubuntu2+esm4, 1:30.2+1-2ubuntu1+esm1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade the Ubuntu emacs to 1:29.3+1-1ubuntu2+esm4 (package) or 1:30.2+1-2ubuntu1+esm1 (package).

Affected software

ProductAffectedFixed in
Ubuntu 26.04 LTSxemacs21pkg:deb/ubuntu/xemacs21?arch=source&distro=resoluteOther threatsAffected
  • =21.4.24-12build3
Fixed in–
Ubuntu 26.04 LTSxemacs21-packagespkg:deb/ubuntu/xemacs21-packages?arch=source&distro=resoluteOther threatsAffected
  • =2009.02.17.dfsg.3-3
  • =2009.02.17.dfsg.3-3build1
Fixed in–
Ubuntu Pro 26.04 LTSemacspkg:deb/ubuntu/emacs?arch=source&distro=esm-apps/resoluteOther threatsAffected
  • <1:30.2+1-2ubuntu1+esm1
Fixed in
  • 1:30.2+1-2ubuntu1+esm1
Ubuntu 25.10emacspkg:deb/ubuntu/emacs?arch=source&distro=questingOther threatsAffected
  • 1:30.1+1-5ubuntu1 – 1:30.1+1-9ubuntu1
5 affected builds
Fixed in–
Ubuntu 25.10xemacs21pkg:deb/ubuntu/xemacs21?arch=source&distro=questingOther threatsAffected
  • =21.4.24-12build3
Fixed in–
Ubuntu 25.10xemacs21-packagespkg:deb/ubuntu/xemacs21-packages?arch=source&distro=questingOther threatsAffected
  • =2009.02.17.dfsg.3-3
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for emacs fixes the following issue: - CVE-2026-6861: memory corruption when processing specially crafted SVG CSS data (bsc#1262611). - Build with tree-sitter-0.26.8 security update (bsc#1262007).

References

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