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Debian: CVE-2021-47248: linux -- security update

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Debian: CVE-2021-47248: linux -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/21/2024
Created
07/31/2024
Added
07/30/2024
Modified
07/30/2024

Description

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 <[email protected]>

Solution(s)

  • debian-upgrade-linux

References

  • https://attackerkb.com/topics/cve-2021-47248
  • CVE - 2021-47248
  • 查看数 699
  • 已创建
  • 最后回复

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