CVE-2021-47259

May 21, 2024, 4:54 p.m.

None
No Score

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.

Product(s) Impacted

Product Versions
Linux kernel
  • 4.13 - 5.10
Linux kernel
  • 4.13 - 5.6

Weaknesses

Common security weaknesses mapped to this vulnerability.

References

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

Tags

416baaa9-dc9f-4396-8d5f-8c081fb06d67
2024-05-21
CVE-2021-47259

Timeline

Published: May 21, 2024, 3:15 p.m.
Last Modified: May 21, 2024, 4:54 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.