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Fencer Vulns
high 7.5

CVE-2021-3530 json

A flaw was discovered in GNU libiberty within demangle_path() in rust-demangle.c, as distributed in GNU Binutils version 2.36.

published 2021-06-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26846

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

A flaw was discovered in GNU libiberty within demangle_path() in rust-demangle.c, as distributed in GNU Binutils version 2.36. A crafted symbol can cause stack memory to be exhausted leading to a crash.

Patch / fix

  • binutils Debian 14, Debian 13, Debian 12 2.37.90.20220207-1

debian advisories DEBIAN-CVE-2021-3530

  • gdb Ubuntu 22.04 LTS 12.1-0ubuntu1~22.04

ubuntu advisories UBUNTU-CVE-2021-3530

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • binutils SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +6 more 2.39-9.50.1
  • cross-ppc-binutils SLE Software Development Kit 12 SP5 2.39-9.50.1
  • cross-spu-binutils SLE Software Development Kit 12 SP5 2.39-9.50.1
  • binutils SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES 15 SP2-LTSS +20 more 2.39-150100.7.40.1
  • cross-rx-binutils openSUSE Leap 15.4, openSUSE Leap 15.3 2.39-150100.7.40.1
  • cross-arm-binutils openSUSE Leap 15.4, openSUSE Leap 15.3 2.39-150100.7.40.1
  • cross-avr-binutils openSUSE Leap 15.4, openSUSE Leap 15.3 2.39-150100.7.40.1
  • cross-ppc-binutils openSUSE Leap 15.4, openSUSE Leap 15.3 2.39-150100.7.40.1

suse advisories SUSE-SU-2022:4277-1SUSE-SU-2022:4146-1

  • binutils Arch Linux 2.38-1

arch linux advisories AVG-1540

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-3530 updated cvss 3.3

binutils: stack memory exhaustion in demangle_path() in rust-demangle.c

  • Red Hat Enterprise Linux 6 binutils Red Hat Enterprise Linux 7 binutils Red Hat Enterprise Linux 8 binutils, gcc-toolset-9-binutils, gcc-toolset-10-binutils Red Hat Enterprise Linux 9 binutils, binutils-gold
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.40% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a binutils

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.