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CVE-2021-47166— NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()

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 nfs_do_recoalesce() 中的 pg_bytes_writing存在安全问题。

AI Predicted 3.3 Difficulty: Theoretical EPSS 0.24% · P15

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux a7d42ddb3099727f58366fa006f850a219cce6c8< e8b8418ce14ae66ee55179901edd12191ab06a9e affected
a7d42ddb3099727f58366fa006f850a219cce6c8< b291baae24f876acd5a5dd57d0bb2bbac8a68b0c affected
a7d42ddb3099727f58366fa006f850a219cce6c8< c757c1f1e65d89429db1409429436cf40d47c008 affected
a7d42ddb3099727f58366fa006f850a219cce6c8< 40f139a6d50c232c0d1fd1c5e65a845c62db0ede affected
a7d42ddb3099727f58366fa006f850a219cce6c8< 785917316b25685c9b3a2a88f933139f2de75e33 affected
a7d42ddb3099727f58366fa006f850a219cce6c8< 7087db95c0a06ab201b8ebfac6a7ec1e34257997 affected
a7d42ddb3099727f58366fa006f850a219cce6c8< 2fe1cac336b55a1f79e603e9ce3552c3623e90eb affected
a7d42ddb3099727f58366fa006f850a219cce6c8< 0d0ea309357dea0d85a82815f02157eb7fcda39f affected
… +10 more rows
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I. Basic Information for CVE-2021-47166

Vulnerability Information
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Vulnerability Title
NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() The value of mirror->pg_bytes_written should only be updated after a successful attempt to flush out the requests on the list.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 nfs_do_recoalesce() 中的 pg_bytes_writing存在安全问题。
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 a7d42ddb3099727f58366fa006f850a219cce6c8 ~ e8b8418ce14ae66ee55179901edd12191ab06a9e -
Linux Linux 4.0 -

II. Public POCs for CVE-2021-47166

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III. Intelligence Information for CVE-2021-47166

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Other References for CVE-2021-47166 (8)

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-2021-47168 9.8 CRITICAL NFS: fix an incorrect limit in filelayout_decode_layout()
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-2021-47175 7.8 HIGH net/sched: fq_pie: fix OOB access in the traffic path
CVE-2021-47163 7.8 HIGH tipc: wait and exit until all work queues are done
CVE-2021-47159 7.8 HIGH net: dsa: fix a crash if ->get_sset_count() fails
CVE-2021-47158 7.8 HIGH net: dsa: sja1105: add error handling in sja1105_setup()
CVE-2021-47153 7.8 HIGH i2c: i801: Don't generate an interrupt on bus reset
CVE-2021-47152 7.8 HIGH mptcp: fix data stream corruption
CVE-2021-47148 7.8 HIGH octeontx2-pf: fix a buffer overflow in otx2_set_rxfh_context()
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-2021-47167 NFS: Fix an Oopsable condition in __nfs_pageio_add_request()
CVE-2021-47180 NFC: nci: fix memory leak in nci_allocate_device
CVE-2021-47177 iommu/vt-d: Fix sysfs leak in alloc_iommu()
CVE-2021-47176 s390/dasd: add missing discipline function
CVE-2021-47141 gve: Add NULL pointer checks when freeing irqs.

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-2021-47166

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