CVE-2026-105959Spice-server: spice: heap buffer overflow via glz dictionary max_encoders integer truncation
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Enterprise Linux 6. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A flaw was found in spice-server. The GLZ encoder dictionary restore path truncates a size_t allocation size to int when calling the malloc callback, allowing a malicious authenticated SPICE client during VM live migration to trigger a massive heap buffer overflow by sending a crafted max_encoders value in migration data.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
Red Hat Red Hat Enterprise Linux 6 redhat:enterprise_linux | 6 | CNA record |
References
- https://access.redhat.com/security/cve/CVE-2026-105959vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2554008issue-tracking, x-refsource-redhat
- https://gitlab.freedesktop.org/spice/spice/-/merge_requests/253
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.