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CVE-2021-47168— NFS: fix an incorrect limit in filelayout_decode_layout()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于 filelayout_decode_layout()中错误限制字节，可能会导致内存损坏。

CVSS 9.8 · Critical EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 16b374ca439fb406e46e071f75428f5b033056f8< 9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040 affected
16b374ca439fb406e46e071f75428f5b033056f8< b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1 affected
16b374ca439fb406e46e071f75428f5b033056f8< f299522eda1566cbfbae4b15c82970fc41b03714 affected
16b374ca439fb406e46e071f75428f5b033056f8< 945ebef997227ca8c20bad7f8a8358c8ee57a84a affected
16b374ca439fb406e46e071f75428f5b033056f8< e411df81cd862ef3d5b878120b2a2fef0ca9cdb1 affected
16b374ca439fb406e46e071f75428f5b033056f8< 9b367fe770b1b80d7bf64ed0d177544a44405f6e affected
16b374ca439fb406e46e071f75428f5b033056f8< d34fb628f6ef522f996205a9e578216bbee09e84 affected
16b374ca439fb406e46e071f75428f5b033056f8< 769b01ea68b6c49dc3cde6adf7e53927dacbd3a8 affected
… +10 more rows
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I. Basic Information for CVE-2021-47168

Vulnerability Information
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Vulnerability Title
NFS: fix an incorrect limit in filelayout_decode_layout()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: NFS: fix an incorrect limit in filelayout_decode_layout() The "sizeof(struct nfs_fh)" is two bytes too large and could lead to memory corruption. It should be NFS_MAXFHSIZE because that's the size of the ->data[] buffer. I reversed the size of the arguments to put the variable on the left.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于 filelayout_decode_layout()中错误限制字节，可能会导致内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 16b374ca439fb406e46e071f75428f5b033056f8 ~ 9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040 -
Linux Linux 2.6.37 -

II. Public POCs for CVE-2021-47168

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III. Intelligence Information for CVE-2021-47168

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Other References for CVE-2021-47168 (7)

Same Patch Batch · Linux · 2024-03-25 · 40 CVEs total

CVE-2021-47137 9.8 CRITICAL net: lantiq: fix memory corruption in RX ring
CVE-2021-47162 9.8 CRITICAL tipc: skb_linearize the head skb when reassembling msgs
CVE-2021-47136 8.6 HIGH net: zero-initialize tc skb extension on allocation
CVE-2021-47160 8.1 HIGH net: dsa: mt7530: fix VLAN traffic leaks
CVE-2021-47142 7.8 HIGH drm/amdgpu: Fix a use-after-free
CVE-2021-47163 7.8 HIGH tipc: wait and exit until all work queues are done
CVE-2021-47148 7.8 HIGH octeontx2-pf: fix a buffer overflow in otx2_set_rxfh_context()
CVE-2021-47175 7.8 HIGH net/sched: fq_pie: fix OOB access in the traffic path
CVE-2021-47152 7.8 HIGH mptcp: fix data stream corruption
CVE-2021-47153 7.8 HIGH i2c: i801: Don't generate an interrupt on bus reset
CVE-2021-47158 7.8 HIGH net: dsa: sja1105: add error handling in sja1105_setup()
CVE-2021-47159 7.8 HIGH net: dsa: fix a crash if ->get_sset_count() fails
CVE-2021-47179 7.5 HIGH NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
CVE-2021-47178 7.5 HIGH scsi: target: core: Avoid smp_processor_id() in preemptible code
CVE-2021-47173 misc/uss720: fix memory leak in uss720_probe
CVE-2021-47167 NFS: Fix an Oopsable condition in __nfs_pageio_add_request()
CVE-2021-47169 serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait'
CVE-2021-47170 USB: usbfs: Don't WARN about excessively large memory allocations
CVE-2021-47171 net: usb: fix memory leak in smsc75xx_bind
CVE-2021-47172 iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers

Showing top 20 of 40 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47168

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