Source: libvncserver Version: 0.9.15+dfsg-1 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for libvncserver. CVE-2026-32853[0]: | LibVNCServer versions 0.9.15 and prior (fixed in commit 009008e) | contain a heap out-of-bounds read vulnerability in the UltraZip | encoding handler that allows a malicious VNC server to cause | information disclosure or application crash. Attackers can exploit | improper bounds checking in the HandleUltraZipBPP() function by | manipulating subrectangle header counts to read beyond the allocated | heap buffer. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-32853 https://www.cve.org/CVERecord?id=CVE-2026-32853 [1] https://github.com/LibVNC/libvncserver/security/advisories/GHSA-87q7-v983-qwcj [2] https://github.com/LibVNC/libvncserver/commit/009008e2f4d5a54dd71f422070df3af7b3dbc931 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
