{"id":"AZL-96986","summary":"CVE-2026-77219 affecting package emacs for versions less than 29.4-6","details":"GNU Emacs before 31.0.91 contains an integer overflow in the PBM/PPM/PGM image loader that allows an attacker to leak heap memory contents by supplying a crafted image with large dimensions and an elevated max color index. The image loader multiplies image dimensions and channel count using signed integer arithmetic; for sufficiently large values, the result wraps to a negative number, bypassing the bounds check and causing the pixel reader to access heap memory past the end of the allocated buffer. The over-read contents are interpreted as pixel color values and rendered on screen.","modified":"2026-09-20T05:33:47Z","published":"2026-08-21T21:17:06Z","upstream":["CVE-2026-77219"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77219"}],"affected":[{"package":{"name":"emacs","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/emacs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"29.4-6"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-96986.json"}}],"schema_version":"1.9.0"}