An issue was discovered in hwclock.13-v2.27 allows attackers to gain escalated privlidges…
Priority HIGH 65CWE-78Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-78.
Summary
An issue was discovered in hwclock.13-v2.27 allows attackers to gain escalated privlidges or execute arbitrary commands via the path parameter when setting the date.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00547 46th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
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
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2020-21583
- 2026-10-03 Alias added: GHSA-c5mr-x8m3-hpc9
References
More kernel Util-linux vulnerabilities
- TI-2014-07400 Blkid in util-linux before 2.26rc-1 allows local users to execute arbitrary code. CVSS 3.1HIGH 7.8
- TI-2021-02893 A logic error was found in the libmount library of util-linux in the function that allows… CVSS 3.1MEDIUM 5.5
- TI-2015-04386 The mkostemp function in login-utils in util-linux when used incorrectly allows remote… CVSS 3.1CRITICAL 9.8
- TI-2026-21863 util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup CVSS 3.1MEDIUM 4.7
- TI-2024-18667 wall in util-linux through 2.40, often installed with setgid tty permissions, allows… CVSS 3.1LOW 3.3
- TI-2018-05584 In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain… CVSS 3.0HIGH 7.8
Sources
- CVE-2020-21583 · CVE Program
- CVE-2020-21583 · NVD
- FIRST EPSS
- GHSA-c5mr-x8m3-hpc9 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-21583 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences