Vulnerability Details : CVE-2021-46952

In the Linux kernel, the following vulnerability has been resolved: NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds Fix shift out-of-bounds in xprt_calc_majortimeo(). This is caused by a garbage timeout (retrans) mount option being passed to nfs mount, in this case from syzkaller. If the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift value for a 64-bit long integer, so 'retrans' cannot be >= 64. If it is >= 64, fail the mount and return an error.
Published 2024-02-27 19:04:07
Updated 2024-04-10 20:15:42
Source Linux
View at NVD,   CVE.org

Products affected by CVE-2021-46952

Exploit prediction scoring system (EPSS) score for CVE-2021-46952

EPSS FAQ
0.02%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 2 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-46952

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.1
 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
1.8
5.2
 NIST 2024-04-10

CWE ids for CVE-2021-46952

  • The product reads data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-46952

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