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CVE-2021-47179— NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()

EPSS 0.01% · P3

Affected Version Matrix 14

VendorProductVersion RangeStatus
LinuxLinux80e34f4957ec3010c85f9bb0b568a8d46acdf535< 4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42affected
7b7b9774643220e53eef58c15bb29bd4182fe053< 42637ca25c7d7b5a92804a679af5192e8c1a9f48affected
9ffa7967f9379a0a1b924e9ffeda709d72237da7< 39785761feadf261bc5101372b0b0bbaf6a94494affected
6be0e4b59314e4a836495f6ffdc5d2c5b079deeb< aba3c7795f51717ae316f3566442dee7cc3eeccbaffected
2fafe7d5047f98791afd9a1d90d2afb70debc590< f9890652185b72b8de9ebeb4406037640b6e1b53affected
7e65ea887d0c0997f3053acd91a027af45e71c5b< b090d110e66636bca473fd8b98d5c97b555a965aaffected
de144ff4234f935bd2150108019b5d87a90a8a96< a421d218603ffa822a0b8045055c03eae394a7ebaffected
96260bde1ea8ae31a5402fe506abbb8951d5a42caffected
… +6 more rows
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I. Basic Information for CVE-2021-47179

Vulnerability Information
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Vulnerability Title
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() Commit de144ff4234f changes _pnfs_return_layout() to call pnfs_mark_matching_lsegs_return() passing NULL as the struct pnfs_layout_range argument. Unfortunately, pnfs_mark_matching_lsegs_return() doesn't check if we have a value here before dereferencing it, causing an oops. I'm able to hit this crash consistently when running connectathon basic tests on NFS v4.1/v4.2 against Ontap.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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 NFSv4 中的 pnfs_mark_matching_lsegs_return()存在NULL 指针取消引用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 80e34f4957ec3010c85f9bb0b568a8d46acdf535 ~ 4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42 -
LinuxLinux 4.9.269 ~ 4.9.271 -

II. Public POCs for CVE-2021-47179

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III. Intelligence Information for CVE-2021-47179

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

CVE-2021-47170USB: usbfs: Don't WARN about excessively large memory allocations
CVE-2021-47161spi: spi-fsl-dspi: Fix a resource leak in an error handling path
CVE-2021-47162tipc: skb_linearize the head skb when reassembling msgs
CVE-2021-47163tipc: wait and exit until all work queues are done
CVE-2021-47164net/mlx5e: Fix null deref accessing lag dev
CVE-2021-47165drm/meson: fix shutdown crash when component not probed
CVE-2021-47166NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
CVE-2021-47167NFS: Fix an Oopsable condition in __nfs_pageio_add_request()
CVE-2021-47168NFS: fix an incorrect limit in filelayout_decode_layout()
CVE-2021-47169serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait'
CVE-2021-47160net: dsa: mt7530: fix VLAN traffic leaks
CVE-2021-47171net: usb: fix memory leak in smsc75xx_bind
CVE-2021-47172iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers
CVE-2021-47173misc/uss720: fix memory leak in uss720_probe
CVE-2021-47174netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check, fallback to non-AVX2 version
CVE-2021-47175net/sched: fq_pie: fix OOB access in the traffic path
CVE-2021-47176s390/dasd: add missing discipline function
CVE-2021-47177iommu/vt-d: Fix sysfs leak in alloc_iommu()
CVE-2021-47178scsi: target: core: Avoid smp_processor_id() in preemptible code
CVE-2021-47180NFC: nci: fix memory leak in nci_allocate_device

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-2021-47179

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