{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-3826 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-3826 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 1 Sep 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-3826 and fix it if it is affected.\n\nWhat it is: CVE-2021-3826 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 1 Sep 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-3826 in the wild and no public exploit code.\n\nAffected product: Fedoraproject Fedora. 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-2021-3826/ (Markdown: https://insights.sbomify.com/CVE-2021-3826/index.md)","id":"CVE-2021-3826","markdown":"https://insights.sbomify.com/CVE-2021-3826/index.md","name":"CVE-2021-3826","record":{"aliases":["ALSA-2023:6372","CLSA-2024-1718787131","CLSA-2026-1777465067","CLSA-2026-1778020045","CLSA-2026-1780133935","DEBIAN-CVE-2021-3826","GHSA-88rg-m78j-x8xw","RHSA-2023:6372","UBUNTU-CVE-2021-3826"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"libiberty demangling library","requires_auth":"none","summary":"Attackers can cause a denial of service via a crafted mangled symbol triggering a buffer overflow in the libiberty demangling function.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"gcc","vendor":"gnu"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"Heap/stack buffer overflow in the dlang_lname function in d-demangle.c in libiberty allows attackers to potentially cause a denial of service (segmentation fault and crash) via a crafted mangled symbol.","ecosystems":["AlmaLinux:9","Red Hat:enterprise_linux:9::appstream"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Memory corruption in gcc","id":"CVE-2021-3826","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fedoraproject:fedora","products":["fedoraproject:fedora"],"type":"memory_corruption","year":"2021"},"n_packages":12,"n_references":7,"next":{"headline":"ECP SAML binding bypasses authentication flows","id":"CVE-2021-3827"},"packages":[{"ecosystem":"AlmaLinux:9","fixed":["10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb","purl":"pkg:rpm/almalinux/gdb","source":"ALSA-2023:6372"},{"ecosystem":"AlmaLinux:9","fixed":["10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-doc","purl":"pkg:rpm/almalinux/gdb-doc","source":"ALSA-2023:6372"},{"ecosystem":"AlmaLinux:9","fixed":["10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-gdbserver","purl":"pkg:rpm/almalinux/gdb-gdbserver","source":"ALSA-2023:6372"},{"ecosystem":"AlmaLinux:9","fixed":["10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-headless","purl":"pkg:rpm/almalinux/gdb-headless","source":"ALSA-2023:6372"},{"ecosystem":"AlmaLinux:9","fixed":["10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-minimal","purl":"pkg:rpm/almalinux/gdb-minimal","source":"ALSA-2023:6372"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb","purl":"pkg:rpm/redhat/gdb","source":"RHSA-2023:6372"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-debuginfo","purl":"pkg:rpm/redhat/gdb-debuginfo","source":"RHSA-2023:6372"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-debugsource","purl":"pkg:rpm/redhat/gdb-debugsource","source":"RHSA-2023:6372"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-doc","purl":"pkg:rpm/redhat/gdb-doc","source":"RHSA-2023:6372"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-gdbserver","purl":"pkg:rpm/redhat/gdb-gdbserver","source":"RHSA-2023:6372"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-headless","purl":"pkg:rpm/redhat/gdb-headless","source":"RHSA-2023:6372"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:10.2-11.el9"],"introduced":["0"],"last_affected":[],"package":"gdb-minimal","purl":"pkg:rpm/redhat/gdb-minimal","source":"RHSA-2023:6372"}],"prev":{"headline":"Missing Authorization Checks in LiderAhenk","id":"CVE-2021-3825"},"products":["gcc"],"published":"2022-09-01","related":[{"cvss_score":9.8,"headline":"PHP-CGI OS Command Injection","id":"CVE-2024-4577","kev_date_added":"2024-06-12","published":"2024-06-09"},{"cvss_score":9.8,"headline":"Grafana Authentication Bypass","id":"CVE-2021-39226","kev_date_added":"2022-08-25","published":"2021-10-05"},{"cvss_score":9.8,"headline":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow","id":"CVE-2019-5544","kev_date_added":"2021-11-03","published":"2019-12-06"},{"cvss_score":9.6,"headline":"Google Chromium V8 Type Confusion","id":"CVE-2024-4947","kev_date_added":"2024-05-20","published":"2024-05-15"},{"cvss_score":9.6,"headline":"Google Chromium Visuals Use-After-Free","id":"CVE-2024-4671","kev_date_added":"2024-05-13","published":"2024-05-09"},{"cvss_score":9.6,"headline":"Google Chromium Mojo Insufficient Data Validation","id":"CVE-2022-3075","kev_date_added":"2022-09-08","published":"2022-09-26"},{"cvss_score":9.6,"headline":"Google Chromium Indexed DB API Use-After-Free","id":"CVE-2021-30633","kev_date_added":"2021-11-03","published":"2021-10-08"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-14","vendors":["n/a"]},"summary":"Attackers can cause a denial of service via a crafted mangled symbol triggering a buffer overflow in the libiberty demangling function.","url":"https://insights.sbomify.com/CVE-2021-3826/"}