Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8dcbec6d20eb881ba368d0aebc3a8a678aebb1da to < c7eab9e2d7b4e983ce280276fb920af649955897affected8dcbec6d20eb881ba368d0aebc3a8a678aebb1da to < 42c10b0db064e45f5c5ae7019bbf2168ffab766caffected8dcbec6d20eb881ba368d0aebc3a8a678aebb1da to < 3e3c7ebbfac152d08be75c92802a64a1f6471a15affected8dcbec6d20eb881ba368d0aebc3a8a678aebb1da to < c3b6cf64dfe4ef96e7341508d50d6998da7062c7affected8dcbec6d20eb881ba368d0aebc3a8a678aebb1da to < 72651c6579a25317a90536181d311c663d0329abaffected8dcbec6d20eb881ba368d0aebc3a8a678aebb1da to < 476bdb04c501fc64bf3b8464ffddefc8dbe01577affected
Linux Linux
Default version status: affected
4.13affected0 to < 4.13unaffected4.14.237 to ≤ 4.14.*unaffected4.19.195 to ≤ 4.19.*unaffected5.4.126 to ≤ 5.4.*unaffected5.10.44 to ≤ 5.10.*unaffected5.12.11 to ≤ 5.12.*unaffected5.13 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897 ↗
- https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c ↗
- https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15 ↗
- https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7 ↗
- https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab ↗
- https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577 ↗