CVE-2026-84410 PUBLISHED

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

Assigner: canonical
Reserved: 23.09.2026 Published: 09.11.2026 Updated: 09.11.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 7.3

Product Status

Vendor Canonical
Product apport
Versions Default: unaffected
  • affected from 2.9.0 to 2.37.0 (excl.)

Credits

  • Dohyeon An reporter
  • Benjamin Drung remediation developer

References

Problem Types

  • CWE-269 Improper Privilege Management CWE

Impacts

  • CAPEC-122 Privilege Escalation