{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-18220", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-18220", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-07-29T09:47:51.891Z", "updatedAt": "2026-07-29T12:12:53.713Z", "importedAt": "2026-10-24T01:57:55.771Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Binutils: binutils: out-of-bounds write in bfd dlx elf backend relocation processing", "summary": "An out-of-bounds write vulnerability was found in the BFD library's DLX ELF backend (bfd/elf32-dlx.c) in GNU binutils. The dlx_rtype_to_howto() function maps ELF relocation types to internal howto structures but fails to perform adequate bounds checking on attacker-controlled relocation type values (via ELF32_R_TYPE(r_info)) before indexing into the dlx_elf_howto_table[] array. The DLX relocation type number space is non-contiguous (basic types 0-6, extended types at 0x10000+), but the default case in the switch statement allows arbitrary index values to reach the array access.\n\nA specially crafted ELF/DLX object file can trigger this out-of-bounds write when processed by any BFD-consuming tool (objdump, readelf, strip, ld, nm, objcopy). The vulnerability has been demonstrated to achieve arbitrary code execution via a File Stream Oriented Programming (FSOP) attack against glibc FILE structures (stderr), redirecting control flow to system().\n\nAttack scenarios include CI/CD pipelines performing automated binary analysis, developer workstations running objdump/readelf on untrusted binaries, automated security scanning or malware analysis tools invoking binutils, and package build systems processing third-party code.\n\nNote: This vulnerability is only exploitable when binutils is built with the DLX backend enabled (typically via --enable-targets=all).", "affected": [ { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "gcc-toolset-15-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "gcc-toolset-16-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "gdb", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "mingw-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "packageName": "binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "packageName": "binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "packageName": "gdb", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "gcc-toolset-14-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "gcc-toolset-14-gdb", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "gcc-toolset-15-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "gcc-toolset-15-gdb", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "gdb", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "mingw-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "gcc-toolset-14-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "gcc-toolset-15-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "gcc-toolset-16-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "gdb", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "mingw-binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat Hardened Images", "packageName": "binutils", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected", "versions": [] }, { "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "packageName": "rhcos", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "versions": [] } ] } } }