CVE-2021-47186

low-risk
Published 2024-04-10

In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup can return a null pointer so need to check for it, otherwise the null key will be dereferenced later in tipc_crypto_key_xmit as can be seen in the trace [1]. [1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Linux

References (6)

Patch https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916
Patch https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10
Patch https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9
Patch https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916
Patch https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10
Patch https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low