Vulnerability-Lookup

ubuntu-cve-2026-13732

Vulnerability from osv_ubuntu

Published

2026-08-31 20:17

Modified

2026-09-02 16:12

Summary

Details

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

7.8 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-13732	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-13732	REPORT
	https://access.redhat.com/security/cve/CVE-2026-13732	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2494416	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gdb",
            "binary_version": "7.11.1-0ubuntu1~16.5+esm1"
          },
          {
            "binary_name": "gdb-multiarch",
            "binary_version": "7.11.1-0ubuntu1~16.5+esm1"
          },
          {
            "binary_name": "gdb-source",
            "binary_version": "7.11.1-0ubuntu1~16.5+esm1"
          },
          {
            "binary_name": "gdb64",
            "binary_version": "7.11.1-0ubuntu1~16.5+esm1"
          },
          {
            "binary_name": "gdbserver",
            "binary_version": "7.11.1-0ubuntu1~16.5+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "gdb",
        "purl": "pkg:deb/ubuntu/gdb@7.11.1-0ubuntu1~16.5+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.10-1ubuntu2",
        "7.10-1ubuntu3",
        "7.10.1-0ubuntu1",
        "7.10.90.20160215-0ubuntu2",
        "7.10.90.20160220-0ubuntu1",
        "7.11-0ubuntu1",
        "7.11.1-0ubuntu1~16.04",
        "7.11.1-0ubuntu1~16.5",
        "7.11.1-0ubuntu1~16.5+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gdb",
            "binary_version": "8.1.1-0ubuntu1+esm1"
          },
          {
            "binary_name": "gdb-multiarch",
            "binary_version": "8.1.1-0ubuntu1+esm1"
          },
          {
            "binary_name": "gdb-source",
            "binary_version": "8.1.1-0ubuntu1+esm1"
          },
          {
            "binary_name": "gdbserver",
            "binary_version": "8.1.1-0ubuntu1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "gdb",
        "purl": "pkg:deb/ubuntu/gdb@8.1.1-0ubuntu1+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.0.1-0ubuntu1",
        "8.0.1-0ubuntu2",
        "8.0.1-0ubuntu3",
        "8.1-0ubuntu1",
        "8.1-0ubuntu2",
        "8.1-0ubuntu3",
        "8.1-0ubuntu3.1",
        "8.1-0ubuntu3.2",
        "8.1.1-0ubuntu1",
        "8.1.1-0ubuntu1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gdb",
            "binary_version": "9.2-0ubuntu1~20.04.2"
          },
          {
            "binary_name": "gdb-multiarch",
            "binary_version": "9.2-0ubuntu1~20.04.2"
          },
          {
            "binary_name": "gdb-source",
            "binary_version": "9.2-0ubuntu1~20.04.2"
          },
          {
            "binary_name": "gdbserver",
            "binary_version": "9.2-0ubuntu1~20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "gdb",
        "purl": "pkg:deb/ubuntu/gdb@9.2-0ubuntu1~20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.3-0ubuntu1",
        "9.0.50.20191019-0ubuntu1",
        "9.0.50.20191119-0ubuntu1",
        "9.0.90.20191216-0ubuntu1",
        "9.0.90.20200105-0ubuntu1",
        "9.0.90.20200117-0ubuntu1",
        "9.1-0ubuntu1",
        "9.2-0ubuntu1~20.04",
        "9.2-0ubuntu1~20.04.1",
        "9.2-0ubuntu1~20.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gdb",
            "binary_version": "12.1-0ubuntu1~22.04.2"
          },
          {
            "binary_name": "gdb-multiarch",
            "binary_version": "12.1-0ubuntu1~22.04.2"
          },
          {
            "binary_name": "gdb-source",
            "binary_version": "12.1-0ubuntu1~22.04.2"
          },
          {
            "binary_name": "gdbserver",
            "binary_version": "12.1-0ubuntu1~22.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "gdb",
        "purl": "pkg:deb/ubuntu/gdb@12.1-0ubuntu1~22.04.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "11.1-0ubuntu2",
        "11.1-0ubuntu3",
        "11.2-0ubuntu1",
        "12.0.50.20220217-0ubuntu1",
        "12.0.90-0ubuntu1",
        "12.1-0ubuntu1~22.04",
        "12.1-0ubuntu1~22.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gdb",
            "binary_version": "15.1-1ubuntu1~24.04.1"
          },
          {
            "binary_name": "gdb-multiarch",
            "binary_version": "15.1-1ubuntu1~24.04.1"
          },
          {
            "binary_name": "gdb-source",
            "binary_version": "15.1-1ubuntu1~24.04.1"
          },
          {
            "binary_name": "gdbserver",
            "binary_version": "15.1-1ubuntu1~24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "gdb",
        "purl": "pkg:deb/ubuntu/gdb@15.1-1ubuntu1~24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "14.0.50.20230907-0ubuntu1",
        "14.1-0ubuntu1",
        "14.1-0ubuntu2",
        "15.0.50.20240219-0ubuntu1",
        "15.0.50.20240320-0ubuntu1",
        "15.0.50.20240403-0ubuntu1",
        "15.1-1ubuntu1~24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gdb",
            "binary_version": "17.1-2ubuntu1"
          },
          {
            "binary_name": "gdb-minimal",
            "binary_version": "17.1-2ubuntu1"
          },
          {
            "binary_name": "gdb-multiarch",
            "binary_version": "17.1-2ubuntu1"
          },
          {
            "binary_name": "gdb-source",
            "binary_version": "17.1-2ubuntu1"
          },
          {
            "binary_name": "gdbserver",
            "binary_version": "17.1-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "gdb",
        "purl": "pkg:deb/ubuntu/gdb@17.1-2ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "16.3-1ubuntu2",
        "16.3-5ubuntu1",
        "17.1-1ubuntu1",
        "17.1-1ubuntu2",
        "17.1-2ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in GDB\u0027s 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.",
  "id": "UBUNTU-CVE-2026-13732",
  "modified": "2026-09-02T16:12:03Z",
  "published": "2026-08-31T20:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-13732"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-13732"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-13732"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2494416"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-13732"
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-08-31 19:23 – Updated: 2026-09-01 14:59

Title

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

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/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

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-13732",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T14:33:22.469791Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-01T14:59:18.300Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "gdb",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
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          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "affected",
          "packageName": "gdb",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "gdb",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
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          "packageName": "gdb",
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        },
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          "cpes": [
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          "defaultStatus": "affected",
          "packageName": "gdb",
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      "credits": [
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          "lang": "en",
          "value": "Red Hat would like to thank JD Marsters (Bhut Red) for reporting this issue."
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      ],
      "datePublic": "2026-08-06T00:00:00.000Z",
      "descriptions": [
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          "lang": "en",
          "value": "A flaw was found in GDB\u0027s STABS debug format parser. The\nread_member_functions() function in gdb/stabsread.c contains a linked\nlist removal bug in the code that separates destructor and non-destructor\nmember functions of C++ classes. The bug causes the destructor entries to\nremain in the main function list while the list length counter is\ndecremented, resulting in an out-of-bounds write when the function list\nis copied to its final allocated array. An attacker can craft an ELF\nbinary with malicious .stab and .stabstr sections that triggers this\nout-of-bounds write when a user opens the file in GDB and performs any\nsymbol-inspection operation such as setting a breakpoint. The inferior\nprocess does not need to be executed. Under controlled conditions, this\nwas demonstrated to achieve execution of arbitrary commands within the\nGDB process."
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      "metrics": [
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          "other": {
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              "namespace": "https://access.redhat.com/security/updates/classification/",
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        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
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            }
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          "tags": [
            "vdb-entry",
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          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-13732"
        },
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          "name": "RHBZ#2494416",
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          ],
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        }
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      "timeline": [
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          "lang": "en",
          "time": "2026-06-29T14:42:56.970Z",
          "value": "Reported to Red Hat."
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        {
          "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": "2026-09-01T14:59:18.300Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

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.