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]>
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | linux | < 5.10.46-1 | linux_5.10.46-1_all.deb |
Debian | 11 | all | linux | < 5.10.46-1 | linux_5.10.46-1_all.deb |
Debian | 10 | all | linux | < 4.19.208-1 | linux_4.19.208-1_all.deb |
Debian | 999 | all | linux | < 5.10.46-1 | linux_5.10.46-1_all.deb |
Debian | 13 | all | linux | < 5.10.46-1 | linux_5.10.46-1_all.deb |