CVE-2021-43412 json
An issue was discovered in GNU Hurd before 0.9 20210404-9.
published 2021-11-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30347
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
An issue was discovered in GNU Hurd before 0.9 20210404-9. libports accepts fake notification messages from any client on any port, which can lead to port use-after-free. This can be exploited for local privilege escalation to get full root access.
Patch / fix
- gnu hurd 0.9.20210404-9
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- lists.gnu.org https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
lists.gnu.org
/archive/html/bug-hurd/2021-05/msg00079.html
exploit, mailing-list, vendor-advisory
- mail-archive.com /bug-hurd%40gnu.org/msg32116.html
Sources
- CVE List CVE-2021-43412
- NVD CVE-2021-43412
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