CVE-2021-32256

Exp

An issue was discovered in GNU libiberty, as distributed in GNU Binutils 2.36. It is a stack-overflow issue in demangle_type in rust-demangle.c.

Published: 2023-07-18 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-32256 is rated Exploit Available (57.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.67%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-32256

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-32256

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.12% 0.67% +0.54%
2 2026-04-13 0.16% 0.12% -0.04%
3 2026-02-24 — 0.16% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-32256

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2021-32256

OS Trackers for CVE-2021-32256

vendor priority summary link
debian unimportant CVE-2021-32256 unimportant priority: Debian including 1 source packages (binutils), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2021-32256
redhat — — https://access.redhat.com/security/cve/CVE-2021-32256
suse low CVE-2021-32256 severity low: SUSE including 338 source package names (0.23.1-12.3:binutils-2.41-150100.7.46.1, 0.23.1-12.3:libctf-nobfd0-2.41-150100.7.46.1, …), 1109 product×package rows across 254 product lines (Container bci/bci-sle15-kernel-module-devel, Container bci/gcc, … (254 product lines)): Fixed 878, Known Affected 231. https://www.suse.com/security/cve/CVE-2021-32256/
ubuntu low CVE-2021-32256 low priority: Ubuntu including 1 source packages (libiberty), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 7, ignored 6. https://ubuntu.com/security/CVE-2021-32256

Affected software / configurations for CVE-2021-32256

Vendor Product Version Raw CPE
gnu binutils 2.36 cpe:2.3:a:gnu:binutils:2.36:*:*:*:*:*:*:*

References for CVE-2021-32256

cvelogic Threat Intelligence