linux: In the Linux kernel, the following vulnerability has been resolved: NFS: fs_context: validate UDP retrans to prevent...
CVE-2021-46952 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-46952, released February 27, 2024. It is not reported as exploited. Patch Radar priority: High.
In the Linux kernel, the following vulnerability has been resolved: NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds Fix shift out-of-bounds in xprt_calc_majortimeo(). This is caused by a garbage timeout (retrans) mount option being passed to nfs mount, in this case from syzkaller. If the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift value for a 64-bit long integer, so 'retrans' cannot be >= 64. If it is >= 64, fail the mount and return an error.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.10.38-1 | DEBIAN-CVE-2021-46952 | Feb 27, 2024 |
| linux · Debian 13.5 (trixie) | 5.10.38-1 | DEBIAN-CVE-2021-46952 | Feb 27, 2024 |
| linux · Debian 14 | 5.10.38-1 | DEBIAN-CVE-2021-46952 | Feb 27, 2024 |
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