vulnerability
Arch Linux: Privilege escalation (CVE-2017-5123)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:N/C:P/I:P/A:P) | Nov 2, 2021 | Jul 11, 2025 | Nov 27, 2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
Nov 2, 2021
Added
Jul 11, 2025
Modified
Nov 27, 2025
Description
It was discovered that when the waitid() syscall in Linux kernel v4.13 was refactored, it accidentally stopped checking that the incoming argument was pointing to userspace. This allowed local attackers to write directly to kernel memory, which could lead to privilege escalation.
Solution
arch-linux-upgrade-latest
References
- CVE-2017-5123
- https://attackerkb.com/topics/CVE-2017-5123
- URL-http://www.openwall.com/lists/oss-security/2017/10/12/18
- URL-https://crbug.com/772848
- URL-https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96ca579a1ecc943b75beba58bebb0356f6cc4b51
- URL-https://security.archlinux.org/ASA-201710-24
- URL-https://security.archlinux.org/ASA-201710-25
- URL-https://security.archlinux.org/ASA-201710-26
- URL-https://security.netapp.com/advisory/ntap-20211223-0003/
- CWE-20
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