The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e)…
Priority MEDIUM 58CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00251 16th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:elfutils_project:elfutils:0.177:*:*:*:*:*:*:* | 0.177 | Vulnerable | Elfutils Project |
- cpe:2.3:a:elfutils_project:elfutils:0.177:*:*:*:*:*:*:* Versions 0.177 Vulnerable ·Elfutils Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-21047
- 2026-10-03 Alias added: GHSA-q33x-5cf5-cqqv
References
More Elfutils Project Elfutils vulnerabilities
- TI-2021-12787 In elfutils 0.183, an infinite loop was found in the function handle_symtab in readelf.c… CVSS 3.1MEDIUM 5.5
- TI-2025-01176 GNU elfutils eu-read readelf.c handle_dynamic_symtab null pointer dereference CVSS 4.0MEDIUM 4.8
- TI-2024-16666 elfutils v0.189 was discovered to contain a NULL pointer dereference via the handle_verdef() function at readelf.c. CVSS 3.1MEDIUM 4.0
- TI-2018-11755 libelf/elf_end.c in elfutils 0.173 allows remote attackers to cause a denial of service… CVSS 3.1CRITICAL 9.8
- TI-2014-00166 Integer overflow in the check_section function in dwarf_begin_elf.c in the libdw library… CVSS 2.0MEDIUM 6.8
- TI-2018-06324 elfutils 0.170 has a buffer over-read in the ebl_dynamic_tag_name function of… CVSS 3.0HIGH 7.8
Sources
- CVE-2020-21047 · CVE Program
- CVE-2020-21047 · NVD
- FIRST EPSS
- GHSA-q33x-5cf5-cqqv · GitHub Advisory Database · CC BY 4.0
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