{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-18220 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-18220 is a high-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 29 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-18220 and fix it if it is affected.\n\nWhat it is: CVE-2026-18220 is a high-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 29 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-18220 in the wild and no public exploit code.\n\nAffected product: Red Hat Enterprise Linux 10. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-18220/ (Markdown: https://insights.sbomify.com/CVE-2026-18220/index.md)","id":"CVE-2026-18220","markdown":"https://insights.sbomify.com/CVE-2026-18220/index.md","name":"CVE-2026-18220","record":{"aliases":["DEBIAN-CVE-2026-18220","GHSA-9x84-fgv4-3chj"],"analysis":{"component_type":"developer_tool","fix_type":"patch","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"GNU binutils","requires_auth":"none","summary":"Out-of-bounds write in binutils DLX backend allows arbitrary code execution when processing crafted ELF files, requiring the DLX backend to be enabled.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"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).","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-06-22","github_poc":1,"max_poc_stars":88,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-06-22T13:11:58Z","kind":"github_poc","ref":"https://github.com/4D4J/objdump-Out-Of-Bounds-write","stars":88,"title":"Proof of Concept (PoC) demonstrating the CVE-2026-18220, an out-of-bounds (OOB) write vulnerability in the DLX ELF backend of GNU binutils (specifically triggered via `objdump -g`)"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Binutils: binutils: out-of-bounds write in bfd dlx elf backend relocation processing","id":"CVE-2026-18220","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"IBM i is Affected By Improper Authorization and Authentication Vulnerabilities in DDM / DRDA [, ]","id":"CVE-2026-18221"},"packages":[],"prev":{"headline":"Keycloak-services: keycloak-services: client not-before revocation ignored when realm not-before is older but nonzero","id":"CVE-2026-18218"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat Hardened Images","Red Hat OpenShift Container Platform 4"],"published":"2026-07-29","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-29","vendors":["Red Hat"]},"summary":"Out-of-bounds write in binutils DLX backend allows arbitrary code execution when processing crafted ELF files, requiring the DLX backend to be enabled.","url":"https://insights.sbomify.com/CVE-2026-18220/"}