CVE-2026-13732Gdb: gdb: out-of-bounds write in stabs parser read_member_functions() via crafted elf

Description

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.

Timeline

Scores

EPSS (exploitation in 30 days)

0.14% · top 96% of all CVEs (12 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.

Affected products

• Red Hat · Red Hat Enterprise Linux 10

  • unaffected 0:16.3-3.1.el10_2 – < *

• Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support

  • unaffected 0:14.2-4.3.el10_0 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:8.2-20.1.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

  • unaffected 0:8.2-15.1.el8_4 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

  • unaffected 0:8.2-15.1.el8_4 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

  • unaffected 0:8.2-18.1.el8_6 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

  • unaffected 0:8.2-18.1.el8_6 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service

  • unaffected 0:8.2-19.1.el8_8 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

  • unaffected 0:8.2-19.1.el8_8 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 0:16.3-3.1.el9_8 – < *

• Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

  • unaffected 0:10.2-10.2.el9_2 – < *

• Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

  • unaffected 0:10.2-13.1.el9_4 – < *

• Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support

  • unaffected 0:14.2-4.2.el9_6 – < *

• Red Hat · Red Hat Cost Management On-Premise 1

  • unaffected 1791460851 – < *

• Red Hat · Red Hat Hardened Images

  • unaffected 17.2-6.2.hum1 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1794259031 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1794259119 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1794259034 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1794259393 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1794260794 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794260631 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794259404 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794259570 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794259370 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794259815 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794260191 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794259182 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794259064 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1794260782 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259958 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259318 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259380 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259862 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259110 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259559 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259807 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259456 – < *

• Red Hat · Red Hat OpenShift AI 3.5

  • unaffected 1794259162 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1791978534 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1791978528 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1791978528 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1791964013 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1791978693 – < *

• Red Hat · Red Hat Enterprise Linux 6

  All versions: affected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: affected

What to do

Workaround: The following practices would help for avoiding exposure and mitigate this flaw: - Do not open untrusted or unknown ELF binaries in GDB without first stripping debug sections. Use `objcopy --remove-section=.stab --remove-section=.stabstr <binary>` before debugging. - Use `readelf -S <binary> | grep stab` to check for the presence of STABS sections before opening a binary in GDB. Legitimate modern binaries use DWARF, not STABS. - Consider using LLDB or other debuggers that do not support STABS for analysis of untrusted binaries. - For automated environments (CI, test farms) that invoke GDB on potentially untrusted binaries, run GDB in a sandboxed or containerized environment with restricted filesystem access. - GDB 17+ deprecates STABS support but still parses it. GDB 18 (expected late 2026/2027) will remove STABS support entirely. - GCC removed STABS emitting in GCC 13 (2023), so legitimately compiled binaries from recent GCC versions will not contain STABS data.

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2026-68746 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-13732](https://cveledger.app/badge/CVE-2026-13732.svg)](https://cveledger.app/cve/CVE-2026-13732)

Record last updated 13 Nov 2026, 12:22 UTC.