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Vulnerability Details CVE-2021-47248

In the Linux kernel, the following vulnerability has been resolved: udp: fix race between close() and udp_abort() Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions. We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race happens. Diagnosed-and-tested-by: Kaustubh Pandey <kapandey@codeaurora.org>
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 0.3%
CVSS Severity
CVSS v3 Score 4.7
References
Products affected by CVE-2021-47248


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