Unrated severityNVD Advisory· Published Mar 24, 2026· Updated Mar 25, 2026
LibVNCServer UltraZip Encoding Heap Out-of-bounds Read
CVE-2026-32853
Description
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.
AI Insight
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Affected products
11<=0.9.15+ 1 more
- (no CPE)range: <=0.9.15
- (no CPE)range: 0
- osv-coords9 versionspkg:rpm/opensuse/LibVNCServer&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/LibVNCServer&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/LibVNCServer&distro=openSUSE%20Tumbleweedpkg:rpm/suse/LibVNCServer&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7pkg:rpm/suse/LibVNCServer&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/LibVNCServer&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/LibVNCServer&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/LibVNCServer&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/LibVNCServer&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7
< 0.9.14-150600.3.6.1+ 8 more
- (no CPE)range: < 0.9.14-150600.3.6.1
- (no CPE)range: < 0.9.14-160000.4.1
- (no CPE)range: < 0.9.15-2.1
- (no CPE)range: < 0.9.14-150600.3.6.1
- (no CPE)range: < 0.9.9-17.44.1
- (no CPE)range: < 0.9.14-160000.4.1
- (no CPE)range: < 0.9.14-160000.4.1
- (no CPE)range: < 0.9.9-17.44.1
- (no CPE)range: < 0.9.14-150600.3.6.1
Patches
Vulnerability mechanics
References
3News mentions
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