Use After Free Affecting kernel-doc package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDOC-7102203
- published 24 May 2024
- disclosed 21 May 2024
Introduced: 21 May 2024
CVE-2021-47259 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-doc.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-doc package and not the kernel-doc package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2021-47259
- https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15
- https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c
- https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577
- https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab
- https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7
- https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897