Ubuntu.comUB:CVE-2021-47248CVE-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
<[email protected]>
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | linux | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 14.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
References
git.kernel.org/linus/a8b897c7bcd47f4147d066e22cc01d1026d7640e (5.13-rc7)
git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad
git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56
git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241
git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac
git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e
git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e
git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f
launchpad.net/bugs/cve/CVE-2021-47248
nvd.nist.gov/vuln/detail/CVE-2021-47248
security-tracker.debian.org/tracker/CVE-2021-47248
www.cve.org/CVERecord?id=CVE-2021-47248
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