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VulnerabilityPublished Updated

CVE-2024-5300: snapd · An access control bypass and information disclosure vulnerability exists in the base AppArmor security

Affects snapdSource GCVE Database

0
Authoritative record:CVE-2024-5300· Medium 5.6

Not known to be exploited · CVSS 5.6 Medium · fixed in 2.61.4ubuntu0.16.04.1+esm4 : update snapd when convenient.

Data as of 26 Oct 2026, 13:47 UTC

CVSS 3.1 base score
5.6Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.61.4ubuntu0.16.04.1+esm4, 2.61.4ubuntu0.18.04.1+esm4, 2.67.1+20.04ubuntu1~esm3 +3
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Jul 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 to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 26.04 LTSsnapdpkg:deb/ubuntu/snapd?arch=source&distro=resoluteOther threatsAffected
  • <2.76+ubuntu26.04.3
Fixed in
  • 2.76+ubuntu26.04.3
Ubuntu 25.10snapdpkg:deb/ubuntu/snapd?arch=source&distro=questingOther threatsAffected
  • 2.67.1+25.04 – 2.75.2+ubuntu25.10
9 affected builds
Fixed in–
Ubuntu 24.04 LTSsnapdpkg:deb/ubuntu/snapd?arch=source&distro=nobleOther threatsAffected
  • <2.76+ubuntu24.04.1
Fixed in
  • 2.76+ubuntu24.04.1
Ubuntu 22.04 LTSsnapdpkg:deb/ubuntu/snapd?arch=source&distro=jammyOther threatsAffected
  • <2.76+ubuntu22.04.1
Fixed in
  • 2.76+ubuntu22.04.1
Ubuntu Pro 20.04 LTSsnapdpkg:deb/ubuntu/snapd?arch=source&distro=esm-infra/focalOther threatsAffected
  • <2.67.1+20.04ubuntu1~esm3
Fixed in
  • 2.67.1+20.04ubuntu1~esm3
Ubuntu Pro 18.04 LTSsnapdpkg:deb/ubuntu/snapd?arch=source&distro=esm-infra/bionicOther threatsAffected
  • <2.61.4ubuntu0.18.04.1+esm4
Fixed in
  • 2.61.4ubuntu0.18.04.1+esm4

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

Description

An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/. On systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application's sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns "complete" user records—including sensitive hashed user passwords from /etc/shadow—when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments.

References

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