Vulnerability identifier: #VU88818
Vulnerability risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-416
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the smb20_oplock_break_ack() function in fs/ksmbd/smb2pdu.c and fs/smb/server/smb2pdu.c. A local user can trigger a use-after-free error and escalate privileges on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Linux kernel:
External links
http://git.kernel.org/stable/c/694e13732e830cbbfedb562e57f28644927c33fd
http://git.kernel.org/stable/c/8226ffc759ea59f10067b9acdf7f94bae1c69930
http://git.kernel.org/stable/c/d5b0e9d3563e7e314a850e81f42b2ef6f39882f9
http://git.kernel.org/stable/c/c69813471a1ec081a0b9bf0c6bd7e8afd818afce
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.