Ubuntu.comUB:CVE-2021-47259CVE-2021-47259
In the Linux kernel, the following vulnerability has been resolved: NFS:
Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free
when attempting to mount two different exports through two different NICs
that belong to the same server. Olga was able to hit this with kernels
starting somewhere between 5.7 and 5.10, but I traced the patch that
introduced the clear_bit() call to 4.13. So something must have changed in
the refcounting of the clp pointer to make this call to nfs_put_client()
the very last one.
| 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/476bdb04c501fc64bf3b8464ffddefc8dbe01577 (5.13-rc6)
git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15
git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c
git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577
git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab
git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7
git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897
launchpad.net/bugs/cve/CVE-2021-47259
nvd.nist.gov/vuln/detail/CVE-2021-47259
security-tracker.debian.org/tracker/CVE-2021-47259
www.cve.org/CVERecord?id=CVE-2021-47259
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