جزئیات آسیب‌پذیری

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.

• https://access.redhat.com/errata/RHSA-2026:73425 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:73426 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:73427 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:79357 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:82447 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:82939 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/security/cve/CVE-2026-13732 vdb-entryx_refsource_REDHAT
• https://bugzilla.redhat.com/show_bug.cgi?id=2494416 issue-trackingx_refsource_REDHAT