{"id":"CVE-2021-3826","details":"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.","modified":"2026-04-02T07:27:22.932776Z","published":"2022-09-01T21:15:08.843Z","related":["ALSA-2023:6372","MGASA-2022-0425","SUSE-SU-2022:4146-1","SUSE-SU-2022:4277-1","openSUSE-SU-2024:12631-1"],"references":[{"type":"WEB","url":"https://gcc.gnu.org/git/?p=gcc.git%3Ba=commit%3Bh=5481040197402be6dfee265bd2ff5a4c88e30505"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4MYLS3VR4OPL5ECRWOR4ZHMGXUSCJFZY/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6AKZ2DTS3ATVN5PANNVLKLE5OP4OF25Q/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7MTEHT3G6YKJ7F7MSGWYSI4UM3XBAYXZ/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AXFC74WRZ2Q7F2TSUKPYNIL7ZPBWYI6L/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H424YXGW7OKXS2NCAP35OP6Y4P4AW6VG/"},{"type":"FIX","url":"https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/gcc-mirror/gcc","events":[{"introduced":"0"},{"last_affected":"7ca388565af176bd4efd4f8db1e5e9e11e98ef45"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"11.2"}]}}],"versions":["basepoints/gcc-0","basepoints/gcc-10","basepoints/gcc-11","basepoints/gcc-12","basepoints/gcc-13","basepoints/gcc-14","basepoints/gcc-15","basepoints/gcc-16","basepoints/gcc-5","basepoints/gcc-6","basepoints/gcc-7","basepoints/gcc-8","basepoints/gcc-9","embedded-9-2020-q2","embedded-9-2020q2","misc/cutover-cvs2svn","misc/cutover-egcs-0","misc/cutover-egcs-1","misc/cutover-git","misc/first-auto-changelog","misc/first-auto-changelog-10","misc/first-auto-changelog-8","misc/first-auto-changelog-9","misc/first-egcs-checkin","misc/gccgo-go1_1_2","misc/gupc_5_2_0_release","misc/last-fsf-checkin","misc/start","prereleases/egcs-1.0.1-prerelease","prereleases/egcs-1.0.2-980309-prerelease","prereleases/egcs-1.0.2-prerelease","prereleases/egcs-1.0.3-prerelease","prereleases/egcs-1.1-prerelease","prereleases/egcs-1.1.1-pre","prereleases/egcs-1.1.1-prerelease","prereleases/egcs-1.1.1-prerelease-2","prereleases/egcs-1.1.1-prerelease-3","prereleases/egcs-1.1.2-prerelease-1","prereleases/egcs-1.1.2-prerelease-2","prereleases/egcs-1.1.2-prerelease-3","prereleases/gcc-2.8","prereleases/gcc-2.95-test","prereleases/gcc-2.95.3-test1","prereleases/gcc-2.95.3-test2","prereleases/gcc-2.95.3-test3","prereleases/gcc-2.95.3-test4","prereleases/gcc-2.95.3-test5","prereleases/gcc-4.2.3-rc1","prereleases/gcc-4.2.4-rc1","prereleases/gcc-4.3.2-rc1","prereleases/libgcj-0.1","prereleases/libstdc++-2.92","prereleases/libstdc++-3.0.95","prereleases/libstdc++-3.0.96","prereleases/libstdc++-3.0.97","release-12.2.mpacbti-bet1","release-12.2.mpacbti-rel1","releases/egcs-1.0.0","releases/egcs-1.0.1","releases/egcs-1.0.2","releases/egcs-1.0.3","releases/egcs-1.1.0","releases/egcs-1.1.1","releases/egcs-1.1.2","releases/g77-0.5.21","releases/g77-0.5.22","releases/gcc-10.1.0","releases/gcc-10.2.0","releases/gcc-10.3.0","releases/gcc-10.4.0","releases/gcc-10.5.0","releases/gcc-11.1.0","releases/gcc-11.2.0","releases/gcc-12.1.0","releases/gcc-12.2.0","releases/gcc-12.3.0","releases/gcc-12.4.0","releases/gcc-12.5.0","releases/gcc-13.1.0","releases/gcc-13.2.0","releases/gcc-13.3.0","releases/gcc-13.4.0","releases/gcc-14.1.0","releases/gcc-14.2.0","releases/gcc-14.3.0","releases/gcc-15.1.0","releases/gcc-15.2.0","releases/gcc-2.8.0","releases/gcc-2.8.1","releases/gcc-2.95.0","releases/gcc-2.95.1","releases/gcc-2.95.2","releases/gcc-2.95.2.1","releases/gcc-2.95.3","releases/gcc-3.0.0","releases/gcc-3.0.1","releases/gcc-3.0.2","releases/gcc-3.0.3","releases/gcc-3.0.4","releases/gcc-3.1.0","releases/gcc-3.1.1","releases/gcc-3.2.0","releases/gcc-3.2.1","releases/gcc-3.2.2","releases/gcc-3.2.3","releases/gcc-3.3.0","releases/gcc-3.3.1","releases/gcc-3.3.2","releases/gcc-3.3.3","releases/gcc-3.3.4","releases/gcc-3.3.5","releases/gcc-3.3.6","releases/gcc-3.4.0","releases/gcc-3.4.1","releases/gcc-3.4.2","releases/gcc-3.4.3","releases/gcc-3.4.4","releases/gcc-3.4.5","releases/gcc-3.4.6","releases/gcc-4.0.0","releases/gcc-4.0.1","releases/gcc-4.0.2","releases/gcc-4.0.3","releases/gcc-4.0.4","releases/gcc-4.1.0","releases/gcc-4.1.1","releases/gcc-4.1.2","releases/gcc-4.2.0","releases/gcc-4.2.1","releases/gcc-4.2.2","releases/gcc-4.2.3","releases/gcc-4.2.4","releases/gcc-4.3.0","releases/gcc-4.3.1","releases/gcc-4.3.2","releases/gcc-4.3.3","releases/gcc-4.3.4","releases/gcc-4.3.5","releases/gcc-4.3.6","releases/gcc-4.4.0","releases/gcc-4.4.1","releases/gcc-4.4.2","releases/gcc-4.4.3","releases/gcc-4.4.4","releases/gcc-4.4.5","releases/gcc-4.4.6","releases/gcc-4.4.7","releases/gcc-4.5.0","releases/gcc-4.5.1","releas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