#VU104474 Use-after-free in Linux kernel - CVE-2022-49085
Vulnerability identifier: #VU104474
Vulnerability risk: Low
CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
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 drbd_bitmap_io_from_worker(), notify_resource_state_change(), notify_connection_state_change(), notify_device_state_change(), notify_peer_device_state_change() and broadcast_state_change() functions in drivers/block/drbd/drbd_state.c, within the nla_put_notification_header(), notify_resource_state(), notify_device_state(), notify_connection_state(), notify_peer_device_state(), notify_initial_state_done() and get_initial_state() functions in drivers/block/drbd/drbd_nl.c. A local user can escalate privileges on the system.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: All versions
External links
https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103
https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024
https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362
https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9
https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1
https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6
https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447
https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300
https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e
Q & A
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.
