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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade gdbUpgrade gdb-headlessUpgrade gdb-minimalUpgrade gdb-gdbserverUpgrade gdb-doc | Oct 11, 2026 | Sep 29, 2026 |
| Amazon_linux_2023 | — | Upgrade gdb-debugsourceUpgrade gdb-gdbserverUpgrade crashUpgrade crash-debugsourceUpgrade gdb-headlessUpgrade gdb-debuginfoUpgrade crash-develUpgrade gdbUpgrade crash-debuginfoUpgrade gdb-minimalUpgrade gdb-doc | Sep 30, 2026 | Aug 31, 2026 |
| Redhat_linux | — | Upgrade gdb-debugsourceUpgrade gdb-minimalNo solution existsUpgrade gdb-gdbserverUpgrade gdbUpgrade gdb-headlessUpgrade gdb-debuginfoUpgrade gdb-doc | Sep 2, 2026 | Aug 6, 2026 |
| Rocky_linux | — | Upgrade gdb-debuginfoUpgrade gdb-gdbserverUpgrade gdbUpgrade gdb-headlessUpgrade gdb-debugsourceUpgrade gdb-minimal | Oct 1, 2026 | Sep 30, 2026 |
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