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OpenAdvisories
High ALAS2-2026-3958 1 CVE

Important: gdb security update (Amazon Linux 2)

Published Sep 28, 2026 · Updated Sep 28, 2026

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-13732: A flaw was found in GDB's STABS debug format parser. The read_member_functions() function in gdb/stabsread.c contains a linked list removal bug in the code that separates destructor and non-destructor member functions of C++ classes. The bug causes the destructor entries to remain in the main function list while the list length counter is decremented, resulting in an out-of-bounds write when the function list is copied to its final allocated array. An attacker can craft an ELF binary with malicious .stab and .stabstr sections that triggers this out-of-bounds write when a user opens the file in GDB and performs any symbol-inspection operation such as setting a breakpoint. The inferior process does not need to be executed. Under controlled conditions, this was demonstrated to achieve execution of arbitrary commands within the GDB process.

Fixed packages 4

ReleasePackageFixed in
Amazon Linux · 2 gdb 0:8.0.1-36.amzn2.0.3
Amazon Linux · 2 gdb-debuginfo 0:8.0.1-36.amzn2.0.3
Amazon Linux · 2 gdb-doc 0:8.0.1-36.amzn2.0.3
Amazon Linux · 2 gdb-gdbserver 0:8.0.1-36.amzn2.0.3

Vulnerabilities 1

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-13732.html