Skip to content
Fencer Vulns
high 7.0

CVE-2026-13732 json

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

published 2026-08-31 2 mo ago modified 2026-11-09 6 h ago also EUVD-2026-68746

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:16.3-3.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:14.2-4.3.el10_0
  • Red Hat Red Hat Enterprise Linux 8 0:8.2-20.1.el8_10
  • Red Hat Red Hat Enterprise Linux 9 0:16.3-3.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:10.2-10.2.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:10.2-13.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:14.2-4.2.el9_6
  • Red Hat Red Hat Cost Management On-Premise 1 1791460851
  • Red Hat Red Hat Hardened Images 17.2-6.2.hum1
  • Red Hat Red Hat Update Infrastructure 5 1791964013, 1791978528, 1791978534, 1791978693
  • gdb hummingbird 1 17.2-6.2.hum1
  • gdb-minimal hummingbird 1 17.2-6.2.hum1
  • gdb-headless hummingbird 1 17.2-6.2.hum1
  • gdb-gdbserver hummingbird 1 17.2-6.2.hum1
  • gdb RHEL 10.2 16.3-3.1.el10_2
  • gdb-minimal RHEL 10.2 16.3-3.1.el10_2
  • gdb-headless RHEL 10.2 16.3-3.1.el10_2
  • gdb-gdbserver RHEL 10.2 16.3-3.1.el10_2

red hat advisories RHSA-2026:82447RHSA-2026:73427RHSA-2026:73425RHSA-2026:73426

  • gdb SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 16.3-150400.15.32.1
  • gdb Linux Micro Extras 6.2 16.3-160000.6.1
  • gdb SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 13.2-2.29.1

suse advisories SUSE-SU-2026:4400-1SUSE-SU-2026:4294-1SUSE-SU-2026:23849-1

  • gdb openSUSE Leap 16.0 16.3-160000.6.1
  • gdb-testresults openSUSE Leap 16.0 16.3-160000.6.1

opensuse advisories openSUSE-SU-2026:21890-1

  • gdb AlmaLinux 8 8.2-20.1.el8_10
  • gdb-headless AlmaLinux 8 8.2-20.1.el8_10
  • gdb-gdbserver AlmaLinux 8 8.2-20.1.el8_10
  • gdb AlmaLinux 9 16.3-3.1.el9_8
  • gdb-minimal AlmaLinux 9 16.3-3.1.el9_8
  • gdb-headless AlmaLinux 9 16.3-3.1.el9_8
  • gdb-gdbserver AlmaLinux 9 16.3-3.1.el9_8
  • gdb AlmaLinux 10 16.3-3.1.el10_2

almalinux advisories ALSA-2026:73425ALSA-2026:73426ALSA-2026:73427

  • gdb Rocky Linux 10 16.3-3.1.el10_2
  • gdb Rocky Linux 9 16.3-3.1.el9_8
  • gdb Rocky Linux 8 8.2-20.1.el8_10

rocky linux advisories RLSA-2026:73427RLSA-2026:73426RLSA-2026:73425

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-13732 updated cvss 7.0

gdb: gdb: Out-of-bounds write in STABS parser read_member_functions() via crafted ELF

  • Red Hat Enterprise Linux 6 gdb, gdb-gdbserver Red Hat Enterprise Linux 7 gdb, gdb-gdbserver
    affected: workaround, no fix available
  • Red Hat Cost Management On-Premise 1 costmanagement/costmanagement-ui-rhel10 1791460851
    fixed: vendor fix RHSA-2026:79357
  • Red Hat Enterprise Linux AppStream (v. 8) gdb 8.2-20.1.el8_10, gdb-headless 8.2-20.1.el8_10, gdb-gdbserver 8.2-20.1.el8_10
    fixed: vendor fix RHSA-2026:73425
  • Red Hat Enterprise Linux AppStream (v. 9) gdb 16.3-3.1.el9_8, gdb-minimal 16.3-3.1.el9_8, gdb-headless 16.3-3.1.el9_8, gdb-gdbserver 16.3-3.1.el9_8
    fixed: vendor fix RHSA-2026:73426
  • Red Hat Enterprise Linux AppStream (v. 10) gdb 16.3-3.1.el10_2, gdb-minimal 16.3-3.1.el10_2, gdb-headless 16.3-3.1.el10_2, gdb-gdbserver 16.3-3.1.el10_2
    fixed: vendor fix RHSA-2026:73427
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) gdb 10.2-10.2.el9_2, gdb-minimal 10.2-10.2.el9_2, gdb-headless 10.2-10.2.el9_2, gdb-gdbserver 10.2-10.2.el9_2
    fixed: vendor fix RHSA-2026:96095
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) gdb 10.2-13.1.el9_4, gdb-minimal 10.2-13.1.el9_4, gdb-headless 10.2-13.1.el9_4, gdb-gdbserver 10.2-13.1.el9_4
    fixed: vendor fix RHSA-2026:96096
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) gdb 14.2-4.3.el10_0, gdb-minimal 14.2-4.3.el10_0, gdb-headless 14.2-4.3.el10_0, gdb-gdbserver 14.2-4.3.el10_0
    fixed: vendor fix RHSA-2026:96098
show 3 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) gdb 14.2-4.2.el9_6, gdb-minimal 14.2-4.2.el9_6, gdb-headless 14.2-4.2.el9_6, gdb-gdbserver 14.2-4.2.el9_6
    fixed: vendor fix RHSA-2026:96097
  • Red Hat Hardened Images gdb 17.2-6.2.hum1, gdb-minimal 17.2-6.2.hum1, gdb-headless 17.2-6.2.hum1, gdb-gdbserver 17.2-6.2.hum1
    fixed: vendor fix RHSA-2026:82447
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1791978528, rhui5/rhua-rhel9 1791978693, rhui5/haproxy-rhel9 1791978528, rhui5/installer-rhel9 1791964013, rhui5/cds-kubernetes-rhel9 1791978534
    fixed: vendor fix RHSA-2026:82939

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Cost Management On-Premise 1
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Update Infrastructure 5
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.