CVE-2021-3826
mediumHeap/stack buffer overflow in the dlang_lname function in d-demangle.c in libiberty allows attackers to potentially cause a denial of service (segmentation fau…
Vendor / product: Gnu — gcc
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.
CVSS
6.5
6.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2022-09-01 21:15
Modified: 2026-11-02 19:17
NVD status: Modified
Last synced 1 day ago
Verified against the source API 2026-11-03 07:33 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
gnu / gcc 11.2
fedoraproject / fedora 35, 36, 37
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987
Vendor advisory: https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987
Patch / mitigation: https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987
Patch / mitigation: https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987
References
- https://gcc.gnu.org/git/?p=gcc.git%3Ba=commit%3Bh=5481040197402be6dfee265bd2ff5a4c88e30505 secalert@redhat.com
- https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987 secalert@redhat.com
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... secalert@redhat.com
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... secalert@redhat.com
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... secalert@redhat.com
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... secalert@redhat.com
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... secalert@redhat.com
- https://gcc.gnu.org/git/?p=gcc.git%3Ba=commit%3Bh=5481040197402be6dfee265bd2ff5a4c88e30505 af854a3a-2127-422b-91ae-364da2661108
- https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987 af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... af854a3a-2127-422b-91ae-364da2661108
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/m... af854a3a-2127-422b-91ae-364da2661108
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:33 UTC · record ↗