Use-after-free in Linux kernel - CVE-2020-25668
Published: November 22, 2023
Vulnerability identifier: #VU83431
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-25668
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local authenticated user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the con_font_op. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.
How to mitigate CVE-2020-25668
Install update from vendor's website.
Sources
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=90bfdeef83f1d6c696039b6a917190dcbbad3220
- https://www.openwall.com/lists/oss-security/2020/10/30/1,
- http://www.openwall.com/lists/oss-security/2020/11/04/3
- https://bugzilla.redhat.com/show_bug.cgi?id=1893287,
- http://www.openwall.com/lists/oss-security/2020/10/30/1
- https://www.openwall.com/lists/oss-security/2020/11/04/3,
- https://security.netapp.com/advisory/ntap-20210702-0005/