Description
The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References (4)
Core 4
Core References
Mailing List, Patch, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f90497a16e434c2211c66e3de8e77b17868382b8
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221215-0006/
Exploit, Third Party Advisory
http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Scores
CVSS v3
7.5
EPSS
0.2131
EPSS Percentile
97.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-131
CWE-770
Status
published
Products (8)
linux/linux_kernel
< 5.19.17
linux/linux_kernel
< 6.0.2
netapp/active_iq_unified_manager
netapp/h300s_firmware
netapp/h410c_firmware
netapp/h410s_firmware
netapp/h500s_firmware
netapp/h700s_firmware
Published
Nov 04, 2022
Tracked Since
Feb 18, 2026