Vulnerability-Lookup

SUSE-SU-2026:4294-1

Vulnerability from csaf_suse - Published: 2026-09-23 07:56 - Updated: 2026-09-23 17:27

Summary

Security update for gdb

Severity

Important

Notes

Title of the patch: Security update for gdb

Description of the patch: This update for gdb fixes the following issue: - CVE-2026-13732: Out-of-bounds write in STABS parser read_member_functions() via crafted ELF (bsc#1277757).

Patchnames: SUSE-2026-4294,SUSE-SLE-SERVER-12-SP5-LTSS-2026-4294,SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-4294

CVE-2026-13732

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Recommended 17 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP5:gdb-0:13.2-2.29.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP5:gdb-0:13.2-2.29.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP5:gdb-0:13.2-2.29.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP5:gdb-0:13.2-2.29.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:gdb-0:13.2-2.29.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:gdb-0:13.2-2.29.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:gdb-0:13.2-2.29.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:gdb-0:13.2-2.29.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5:gdb-0:13.2-2.29.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5:gdb-0:13.2-2.29.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5:gdb-0:13.2-2.29.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5:gdb-0:13.2-2.29.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:gdb-0:13.2-2.29.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 12 SP5:gdb-0:13.2-2.29.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 12 SP5:gdb-0:13.2-2.29.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 12 SP5:gdb-0:13.2-2.29.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 12 SP5:gdb-0:13.2-2.29.1.x86_64	—	Vendor Fix

Threats

Impact important

References

8 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://www.suse.com/support/update/announcement/…	self
https://bugzilla.suse.com/1277757	self
https://www.suse.com/security/cve/CVE-2026-13732/	self
https://www.suse.com/security/cve/CVE-2026-13732	external
https://bugzilla.suse.com/1277757	external

JSON

To clipboard

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        "title": "Patchnames"
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}

CVE-2026-13732 (GCVE-0-2026-13732)

Vulnerability from cvelistv5 – Published: 2026-08-31 19:23 – Updated: 2026-09-04 14:37

Title

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

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.

Severity

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 14:33 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

redhat redhat root

References

2 references

URL	Tags
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

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1

Date Public

2026-08-06 00:00

Credits

Red Hat would like to thank JD Marsters (Bhut Red) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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      },
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        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-13732"
        },
        {
          "name": "RHBZ#2494416",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2494416"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-06-29T14:42:56.970Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-08-06T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Gdb: gdb: out-of-bounds write in stabs parser read_member_functions() via crafted elf",
      "workarounds": [
        {
          "lang": "en",
          "value": "The following practices would help for avoiding exposure and mitigate this\nflaw:\n- Do not open untrusted or unknown ELF binaries in GDB without first\n  stripping debug sections. Use `objcopy --remove-section=.stab\n  --remove-section=.stabstr \u003cbinary\u003e` before debugging.\n- Use `readelf -S \u003cbinary\u003e | grep stab` to check for the presence of\n  STABS sections before opening a binary in GDB. Legitimate modern\n  binaries use DWARF, not STABS.\n- Consider using LLDB or other debuggers that do not support STABS for\n  analysis of untrusted binaries.\n- For automated environments (CI, test farms) that invoke GDB on\n  potentially untrusted binaries, run GDB in a sandboxed or containerized\n  environment with restricted filesystem access.\n- GDB 17+ deprecates STABS support but still parses it. GDB 18 (expected\n  late 2026/2027) will remove STABS support entirely.\n- GCC removed STABS emitting in GCC 13 (2023), so legitimately compiled\n  binaries from recent GCC versions will not contain STABS data."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-787: Out-of-bounds Write"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-13732",
    "datePublished": "2026-08-31T19:23:18.741Z",
    "dateReserved": "2026-06-29T14:42:33.339Z",
    "dateUpdated": "2026-09-04T14:37:31.673Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

SUSE-SU-2026:4294-1

CVE-2026-13732 (GCVE-0-2026-13732)

Tags

Sightings

Nomenclature

Related by attack behaviour