SWUpdate before 2026.05 is affected by a time-of-check time-of-use (TOCTOU) race condition that allows local unprivileged attackers to escalate privileges to root or install untrusted contents using a signed update.
CVSS 4.0HIGH 7.3·Local·Low privileges·No interaction·EPSS 0.00101·Published 2026-06-03·Fixed in 2026.05CWE-367
SWUpdate through 2026.05.1 contains an improper certificate validation vulnerability in crypto/swupdate_cms_verify_openssl.c that trusts untrusted X.509 certificates embedded in CMS SignedData for chain building.