UBUNTU-CVE-2026-121996
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-121996
Summary:
Details: A length validation flaw in gdbserver's agent-expression parser allows an unauthenticated remote attacker to read uninitialized heap memory from the gdbserver process and cause a denial of service. Disclosed heap content includes addresses suitable for defeating ASLR in further exploitation.
References: https://ubuntu.com/security/CVE-2026-121996, https://www.cve.org/CVERecord?id=CVE-2026-121996, https://bugzilla.redhat.com/show_bug.cgi?id=2565678, https://access.redhat.com/security/cve/CVE-2026-121996
Affected packages
Package
Name: gdb
Purl: pkg:deb/ubuntu/gdb?arch=source&distro=esm-infra%2Fxenial
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
7.10-1ubuntu2
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
