cbcvebase.
CVE-2021-46952
published 2024-02-27

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…

PriorityP428high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.28%
20.4th percentile
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.

Affected

13 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.10.38-1 (bookworm)linux 5.10.38-1 (bookworm)
linuxlinux——
linuxlinux>= 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 < 96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe296fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2
linuxlinux>= 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 < 2f3380121d49e829fb73ba86240c181bc32ad8972f3380121d49e829fb73ba86240c181bc32ad897
linuxlinux>= 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 < 3d0163821c035040a46d816a42c0780f0f0a30a83d0163821c035040a46d816a42c0780f0f0a30a8
linuxlinux>= 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 < c09f11ef35955785f92369e25819bf0629df2e59c09f11ef35955785f92369e25819bf0629df2e59
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 0 < 5.10.38-15.10.38-1
linuxlinux_kernel>= 5.11.0 < 5.11.205.11.20
linuxlinux_kernel>= 5.12.0 < 5.12.35.12.3
linuxlinux_kernel>= 5.6.0 < 5.10.365.10.36

CVSS provenance

nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
osv7.1HIGH
vendor_debian7.1HIGH
vendor_redhat7.1HIGH
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