linux: In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() K...
CVE-2021-47259 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47259, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.10.46-1 | DEBIAN-CVE-2021-47259 | May 21, 2024 |
| linux · Debian 13.5 (trixie) | 5.10.46-1 | DEBIAN-CVE-2021-47259 | May 21, 2024 |
| linux · Debian 14 | 5.10.46-1 | DEBIAN-CVE-2021-47259 | May 21, 2024 |
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