CVE-2021-3826
MEDIUMCVSS 6.5/10EPSS 1.05%
Last modified
CVE-2021-3826 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.05% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Gcc | 11.2 |
| Fedoraproject | Fedora | 35 |
| Fedoraproject | Fedora | 36 |
| Fedoraproject | Fedora | 37 |
References
- https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987Mailing List, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4MYLS3VR4OPL5ECRWOR4ZHMGXUSCJFZY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6AKZ2DTS3ATVN5PANNVLKLE5OP4OF25Q/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7MTEHT3G6YKJ7F7MSGWYSI4UM3XBAYXZ/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AXFC74WRZ2Q7F2TSUKPYNIL7ZPBWYI6L/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H424YXGW7OKXS2NCAP35OP6Y4P4AW6VG/Mailing List, Third Party Advisory
- https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987Mailing List, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4MYLS3VR4OPL5ECRWOR4ZHMGXUSCJFZY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6AKZ2DTS3ATVN5PANNVLKLE5OP4OF25Q/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7MTEHT3G6YKJ7F7MSGWYSI4UM3XBAYXZ/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AXFC74WRZ2Q7F2TSUKPYNIL7ZPBWYI6L/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H424YXGW7OKXS2NCAP35OP6Y4P4AW6VG/Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3826?
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.
How severe is CVE-2021-3826?
CVE-2021-3826 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3826?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-3826?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST