CVE - CVE-2021-47259

CVE-ID
CVE-2021-47259	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15 URL:https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15 MISC:https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c URL:https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c MISC:https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577 URL:https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577 MISC:https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab URL:https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab MISC:https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7 URL:https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7 MISC:https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897 URL:https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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