# CVE-2026-84410: apport: Local privilege escalation to root via ldd execution on an attacker-controlled ExecutablePath in automatic crash report processing

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

In apport before 2.37.0, an improper privilege management vulnerability allows an unprivileged local attacker to gain root privileges on systems where automatic crash reporting is enabled. The automatic crash report processing pipeline runs as root and executes ldd on the attacker-controlled ExecutablePath field of a crash file placed in the world-writable /var/crash directory, causing the dynamic loader to load and execute an attacker-supplied audit module specified by the ELF's DT_AUDIT tag. This allows an attacker to execute arbitrary code with root privileges and fully compromise the affected system.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: canonical) — https://github.com/canonical/apport/pull/656
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: canonical) — https://github.com/canonical/apport/commit/bc7cc6a70590d6596e1f96ad74a021f2c598d73d

## Affected products and versions

- Canonical / apport (apport): ≥ 2.9.0; < 2.37.0 (affected, semver). Source: CNA: canonical; platforms: Linux

## Severity and prioritization

- CVSS 4.0: 7.3 (high); CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: canonical

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-269

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/canonical/apport/pull/656 (CNA: canonical; patch)

- https://github.com/canonical/apport/commit/bc7cc6a70590d6596e1f96ad74a021f2c598d73d (CNA: canonical; patch)

- https://bugs.launchpad.net/ubuntu/+source/apport/+bug/2164767 (CNA: canonical; issue-tracking)

## Provenance

- CNA: canonical: https://www.cve.org/CVERecord?id=CVE-2026-84410; retrieved 2026-11-09; source updated 2026-11-09

Revision: 553480572b6c88ce0bddb88040953bb6794f811686a51bb0240b936c87626f17

Canonical: https://y2.dev/cve/CVE-2026-84410

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