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9.8

Mesa graphics library could let attackers run code

CVE-2026-40393 · published 3 days ago
Summary

The Mesa graphics package used in Debian 11 and related builds can be exploited to execute unauthorized code on a system. This could allow a malicious user to gain control or disrupt services. Install the latest updated Mesa packages from your distribution’s repository as soon as possible.

What to do
  • Update debian mesa to version 26.0.1-1.
  • Update bellsoft mesa to version 26.0.1-r0.
  • Update debian mesa to version 22.3.6-1+deb12u2.
  • Update debian mesa to version 25.0.7-2+deb13u1.
  • Update debian rootio-mesa to version 22.3.6-1+deb12u1.root.io.1.
  • Update debian rootio-mesa to version 25.0.7-2.root.io.1.
  • Update echo mesa to version 25.0.7-2+e2.
  • Update mesa to version 20.3.5-1.aikido.1.
  • Update rootio-mesa to version 20.3.5-1.aikido.1.
  • Update mesa3d mesa to version 25.3.6 or later.
Affected software
Ecosystem VendorProductAffected versions
Debian:11 debian mesa All versions
Debian:12 debian mesa < 22.3.6-1+deb12u2
Fix: upgrade to 22.3.6-1+deb12u2
Debian:13 debian mesa < 25.0.7-2+deb13u1
Fix: upgrade to 25.0.7-2+deb13u1
Debian:14 debian mesa < 26.0.1-1
Fix: upgrade to 26.0.1-1
– mesa3d mesa < 25.3.6
26.0.0
cpe:2.3:a:mesa3d:mesa:*:*:*:*:*:*:*:*
Alpaquita:stream bellsoft mesa >= 23.1.3-r4, < 26.0.1-r0
Fix: upgrade to 26.0.1-r0
Root:Debian:12 debian rootio-mesa < 22.3.6-1+deb12u1.root.io.1
Fix: upgrade to 22.3.6-1+deb12u1.root.io.1
Root:Debian:13 debian rootio-mesa < 25.0.7-2.root.io.1
Fix: upgrade to 25.0.7-2.root.io.1
Echo echo mesa < 25.0.7-2+e2
Fix: upgrade to 25.0.7-2+e2
Root:Debian:11 – mesa < 20.3.5-1.aikido.1
Fix: upgrade to 20.3.5-1.aikido.1
Root:Debian:11 – rootio-mesa < 20.3.5-1.aikido.1
Fix: upgrade to 20.3.5-1.aikido.1
Original advisory text
CVE-2026-40393 in mesa - Patched by Root
Root has patched CVE-2026-40393 in the mesa package for Root:Debian:11. Multiple fixed versions available.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
9.8 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-787Out-of-bounds Write
Timeline
Published7 Oct 2026
Updated7 Oct 2026
First seen12 Apr 2026
Sources
CVE-2026-40393 · NVD
ECHO-970d-b2f9-098e · OSV
BELL-CVE-2026-40393 · OSV
DEBIAN-CVE-2026-40393 · OSV
ROOT-OS-DEBIAN-12-CVE-2026-40393 · OSV
ROOT-OS-DEBIAN-13-CVE-2026-40393 · OSV
ROOT-OS-DEBIAN-11-CVE-2026-40393 · OSV
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