CVE-2021-47507
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47507
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47507.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47507
- Related
- Published
- 2024-05-24T15:15:11Z
- Modified
- 2024-09-18T03:18:50.576702Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
nfsd: Fix nsfd startup race (again)
Commit bd5ae9288d64 ("nfsd: register pernet ops last, unregister first") has re-opened rpcpipefsevent() race against nfsdnetid registration (registerpernetsubsys()) which has been fixed by commit bb7ffbf29e76 ("nfsd: fix nsfd startup race triggering BUG_ON").
Restore the order of registerpernetsubsys() vs registercldnotifier(). Add WARN_ON() to prevent a future regression.
Crash info: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000012 CPU: 8 PID: 345 Comm: mount Not tainted 5.4.144-... #1 pc : rpcpipefsevent+0x54/0x120 [nfsd] lr : rpcpipefsevent+0x48/0x120 [nfsd] Call trace: rpcpipefsevent+0x54/0x120 [nfsd] blockingnotifiercallchain rpcfillsuper gettreekeyed rpcfsgettree vfsgettree domount ksysmount _arm64sysmount el0svchandler el0svc
- References
-
- https://git.kernel.org/stable/c/8bf902fee5893cfc2f04a698abab47629699ae9a
- https://git.kernel.org/stable/c/b10252c7ae9c9d7c90552f88b544a44ee773af64
- https://git.kernel.org/stable/c/c520943a00ad5015704969ad3304c956bcd49d25
- https://git.kernel.org/stable/c/f5734b1714ca355703e9ea8fb61d04beff1790b9
- https://security-tracker.debian.org/tracker/CVE-2021-47507
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source