#VU77498 Race condition in Linux kernel
Vulnerability identifier: #VU77498
Vulnerability risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-362
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor:
Description
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to a race condition within fs/ksmbd/mgmt/tree_connect.c in ksmbd in Linux kernel when processing SMB2_TREE_DISCONNECT commands. A remote attacker can trigger a use-after-free error using concurrent smb2 tree disconnect requests and execute arbitrary code on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
External links
http://www.zerodayinitiative.com/advisories/ZDI-23-702/
http://github.com/torvalds/linux/commit/30210947a343b6b3ca13adc9bfc88e1543e16dd5
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=30210947a343b6b3ca13adc9bfc88e1543e16dd5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
