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CVE
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CVE-2021-46952Date: (C)2024-02-28   (M)2024-06-06


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.1CVSS Score :
Exploit Score: 1.8Exploit Score:
Impact Score: 5.2Impact Score:
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector:
Attack Complexity: LOWAccess Complexity:
Privileges Required: LOWAuthentication:
User Interaction: NONEConfidentiality:
Scope: UNCHANGEDIntegrity:
Confidentiality: HIGHAvailability:
Integrity: NONE 
Availability: HIGH 
  
Reference:
https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897
https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8
https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2
https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59

CWE    1
CWE-125
OVAL    1
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