Vulnerability CVE-2022-1055
Published: 2022-03-29

Description:
A use-after-free exists in the Linux Kernel in tc_new_tfilter that could allow a local attacker to gain privilege escalation. The exploit requires unprivileged user namespaces. We recommend upgrading past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5

Type:

CWE-416

 (Use After Free)

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.6/10
6.4/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Redhat -> Enterprise linux 
Linux -> Linux kernel 
Fedoraproject -> Fedora 
Canonical -> Ubuntu linux 

 References:
https://kernel.dance/#04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc
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