Is CVE-2021-3826 in the CISA KEV catalog?

No. CVE-2021-3826 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3826?

CVE-2021-3826 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-3826?

CVE-2021-3826 has an EPSS score of 1.09% (61th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3826?

Upgrade binutils on debian 12 to 2.37.50.20220121-1 or later. Fixes are available for 21 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3826

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-119Buffer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

binutilsDebian

Fixed in:2.37.50.20220121-1CVE-2021-3826

devtoolset-12-binutilsRocky

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

Fixed in:0:2.36.1-6.el7.ppc64RHSA-2023:3269

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

devtoolset-12-binutilsRed Hat / RHEL

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

Fixed in:0:2.36.1-6.el7.ppc64RHSA-2023:3269

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

devtoolset-12-binutils-debuginfoRed Hat / RHEL

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

Fixed in:0:2.36.1-6.el7.ppc64RHSA-2023:3269

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

devtoolset-12-binutils-debuginfoRocky

Fixed in:0:2.36.1-6.el7.ppc64RHSA-2023:3269

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

devtoolset-12-binutils-develRed Hat / RHEL

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

Fixed in:0:2.36.1-6.el7.ppc64RHSA-2023:3269

devtoolset-12-binutils-develRocky

Fixed in:0:2.36.1-6.el7.ppc64RHSA-2023:3269

Fixed in:0:2.36.1-6.el7RHSA-2023:3269

gdbRocky

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdbRed Hat / RHEL

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-debuginfoRed Hat / RHEL

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-debuginfoRocky

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-debugsourceRocky

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-debugsourceRed Hat / RHEL

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-docRocky

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-docRed Hat / RHEL

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-gdbserverRed Hat / RHEL

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-gdbserverRocky

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-headlessRed Hat / RHEL

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-headlessRocky

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-minimalRed Hat / RHEL

Fixed in:0:10.2-11.el9RHSA-2023:6372

gdb-minimalRocky

Fixed in:0:10.2-11.el9RHSA-2023:6372

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

1.09%probability of exploitation in 30 days

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Patch1

gcc.gnu.org

Third-Party Advisory5

Other references1

gcc.gnu.org

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

Embed a live status badge for CVE-2021-3826

Markdown

[![CVE-2021-3826](https://tridentstack.com/cve/badge/CVE-2021-3826.svg)](https://tridentstack.com/cve/CVE-2021-3826)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-3826"><img src="https://tridentstack.com/cve/badge/CVE-2021-3826.svg" alt="CVE-2021-3826"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.