CVE-2026-105959CWE-190

CVE-2026-105959

High · published October 16, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
33.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00404 · 33.6th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-10-16T16:16Z
References (3)
https://access.redhat.com/security/cve/CVE-2026-105959 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2554008 · [email protected]https://gitlab.freedesktop.org/spice/spice/-/merge_requests/253 · [email protected]
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 11:53Z
    Spice-server: spice: heap buffer overflow via glz dictionary max_encoders integer truncation
    cvelistv5
  • 16 OCT 11:53Z
    Spice-server: spice: heap buffer overflow via glz dictionary max_encoders integer truncation
    cvelistv5