RHSA-2026:82447

Vulnerability from csaf_redhat - Published: 2026-10-13 19:59 - Updated: 2026-10-14 19:16
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: gdb: * gdb-17.2-6.2.hum1 (aarch64, s390x, x86_64) * gdb-doc-17.2-6.2.hum1 (noarch) * gdb-gdbserver-17.2-6.2.hum1 (aarch64, s390x, x86_64) * gdb-headless-17.2-6.2.hum1 (aarch64, s390x, x86_64) * gdb-minimal-17.2-6.2.hum1 (aarch64, s390x, x86_64) * gdb-17.2-6.2.hum1.src (src) Security Fix(es): gdb: * CVE-2026-13732
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

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.

CWE-787 - Out-of-bounds Write
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:gdb-0:17.2-6.2.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-0:17.2-6.2.hum1@s390x —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-0:17.2-6.2.hum1@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-0:17.2-6.2.hum1@x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-aarch64-rpms —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-s390x-rpms —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-x86_64-rpms —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@s390x —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@s390x —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@s390x —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Important

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  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "JD Marsters"
          ],
          "organization": "Bhut Red"
        }
      ],
      "cve": "CVE-2026-13732",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-06-29T14:42:56.970000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2494416"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "gdb: gdb: Out-of-bounds write in STABS parser read_member_functions() via crafted ELF",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw affects the STABS debug format parser in GDB, which is present\nand active in all currently supported Red Hat product streams that ship\nGDB. The STABS format is a legacy debug information format predating DWARF\nthat GDB parses automatically from .stab/.stabstr ELF sections. While GCC\nremoved STABS emitting support in GCC 13 and GDB deprecated STABS parsing\nin GDB 17, all deployed GDB versions parse STABS data without user opt-in.\nAn attacker can embed STABS sections in any ELF binary, including one\ncompiled with DWARF debug information, and GDB will parse both. The\nvulnerability requires the user to open the crafted binary in GDB and\nissue a symbol-inspection command, which is normal GDB usage.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
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          "Red Hat Hardened Images:gdb-0:17.2-6.2.hum1@s390x",
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          "Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-s390x-rpms",
          "Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-x86_64-rpms",
          "Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@aarch64",
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          "Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@x86_64",
          "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@aarch64",
          "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@s390x",
          "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@x86_64",
          "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@aarch64",
          "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@s390x",
          "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-13732"
        },
        {
          "category": "external",
          "summary": "RHBZ#2494416",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2494416"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-13732",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-13732"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-13732",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13732"
        }
      ],
      "release_date": "2026-08-06T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-13T19:59:20+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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            "Red Hat Hardened Images:gdb-0:17.2-6.2.hum1@s390x",
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            "Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-s390x-rpms",
            "Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-x86_64-rpms",
            "Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@aarch64",
            "Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@s390x",
            "Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@x86_64",
            "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@aarch64",
            "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@s390x",
            "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@x86_64",
            "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@aarch64",
            "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@s390x",
            "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:82447"
        },
        {
          "category": "workaround",
          "details": "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.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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            "Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-s390x-rpms",
            "Red Hat Hardened Images:gdb-doc-0:17.2-6.2.hum1@noarch@public-hummingbird-x86_64-rpms",
            "Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@aarch64",
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            "Red Hat Hardened Images:gdb-gdbserver-0:17.2-6.2.hum1@x86_64",
            "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@aarch64",
            "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@s390x",
            "Red Hat Hardened Images:gdb-headless-0:17.2-6.2.hum1@x86_64",
            "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@aarch64",
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            "Red Hat Hardened Images:gdb-minimal-0:17.2-6.2.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "gdb: gdb: Out-of-bounds write in STABS parser read_member_functions() via crafted ELF"
    }
  ]
}



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