UBUNTU-CVE-2026-121997
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-121997
Summary:
Details: A heap buffer overflow in gdbserver's QTDPsrc packet handler allows an unauthenticated remote attacker to achieve native code execution in the gdbserver process. The vulnerability results from a mismatch between a packet's declared source length and the actual data length, causing hex2bin to write beyond the allocated heap buffer.
References: https://ubuntu.com/security/CVE-2026-121997, https://www.cve.org/CVERecord?id=CVE-2026-121997, https://bugzilla.redhat.com/show_bug.cgi?id=2565679, https://access.redhat.com/security/cve/CVE-2026-121997
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
