CVE-2021-47259 - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

References

Link	Providers
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
https://lore.kernel.org/linux-cve-announce/2024052147-CVE-2021-47259-921b@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47259
https://www.cve.org/CVERecord?id=CVE-2021-47259

History

No history.

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-21T14:19:52.738Z

Updated: 2024-11-04T12:02:28.785Z

Reserved: 2024-05-21T13:27:52.125Z

Link: CVE-2021-47259

Vulnrichment

Updated: 2024-08-04T05:32:07.994Z

NVD

Status : Awaiting Analysis

Published: 2024-05-21T15:15:14.610

Modified: 2024-07-03T01:37:30.730

Link: CVE-2021-47259

Redhat

Severity : Low

Publid Date: 2024-05-21T00:00:00Z

Links: CVE-2021-47259 - Bugzilla

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