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CVE-2021-47235— net: ethernet: fix potential use-after-free in ec_bhf_remove

EPSS 0.01% · P2

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux6af55ff52b02d492d45db88df3e461fa51a6f753< db2bc3cfd2bc01621014d4f17cdfc74611f339c8affected
6af55ff52b02d492d45db88df3e461fa51a6f753< 1cafc540b7bf1b6a5a77dc000205fe337ef6eba6affected
6af55ff52b02d492d45db88df3e461fa51a6f753< b1ad283755095a4b9d1431aeb357d7df1a33d3bbaffected
6af55ff52b02d492d45db88df3e461fa51a6f753< 0260916843cc74f3906acf8b6f256693e01530a2affected
6af55ff52b02d492d45db88df3e461fa51a6f753< 19f88ca68ccf8771276a606765239b167654f84aaffected
6af55ff52b02d492d45db88df3e461fa51a6f753< 95deeb29d831e2fae608439e243e7a520611e7eaaffected
6af55ff52b02d492d45db88df3e461fa51a6f753< d11d79e52ba080ee567cb7d7eb42a5ade60a8130affected
6af55ff52b02d492d45db88df3e461fa51a6f753< 9cca0c2d70149160407bda9a9446ce0c29b6e6c6affected
… +10 more rows
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I. Basic Information for CVE-2021-47235

Vulnerability Information
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Vulnerability Title
net: ethernet: fix potential use-after-free in ec_bhf_remove
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: fix potential use-after-free in ec_bhf_remove static void ec_bhf_remove(struct pci_dev *dev) { ... struct ec_bhf_priv *priv = netdev_priv(net_dev); unregister_netdev(net_dev); free_netdev(net_dev); pci_iounmap(dev, priv->dma_io); pci_iounmap(dev, priv->io); ... } priv is netdev private data, but it is used after free_netdev(). It can cause use-after-free when accessing priv pointer. So, fix it by moving free_netdev() after pci_iounmap() calls.
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，该漏洞源于内存释放后重用。
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 6af55ff52b02d492d45db88df3e461fa51a6f753 ~ db2bc3cfd2bc01621014d4f17cdfc74611f339c8 -
LinuxLinux 3.15 -

II. Public POCs for CVE-2021-47235

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III. Intelligence Information for CVE-2021-47235

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Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total

CVE-2021-47432lib/generic-radix-tree.c: Don't overflow in peek()
CVE-2023-52760gfs2: Fix slab-use-after-free in gfs2_qd_dealloc
CVE-2023-52757smb: client: fix potential deadlock when releasing mids
CVE-2023-52755ksmbd: fix slab out of bounds write in smb_inherit_dacl()
CVE-2023-52754media: imon: fix access to invalid resource for the second interface
CVE-2023-52753drm/amd/display: Avoid NULL dereference of timing generator
CVE-2023-52752smb: client: fix use-after-free bug in cifs_debug_data_proc_show()
CVE-2023-52751smb: client: fix use-after-free in smb2_query_info_compound()
CVE-2023-52750arm64: Restrict CPU_BIG_ENDIAN to GNU as or LLVM IAS 15.x or newer
CVE-2023-52749spi: Fix null dereference on suspend
CVE-2023-52748f2fs: avoid format-overflow warning
CVE-2022-48710drm/radeon: fix a possible null pointer dereference
CVE-2023-52742net: USB: Fix wrong-direction WARNING in plusb.c
CVE-2023-52738drm/amdgpu/fence: Fix oops due to non-matching drm_sched init/fini
CVE-2023-52740powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch
CVE-2023-52739Fix page corruption caused by racy check in __free_pages
CVE-2023-52741cifs: Fix use-after-free in rdata->read_into_pages()
CVE-2023-52743ice: Do not use WQ_MEM_RECLAIM flag for workqueue
CVE-2023-52746xfrm/compat: prevent potential spectre v1 gadget in xfrm_xlate32_attr()
CVE-2023-52747IB/hfi1: Restore allocated resources on failed copyout

Showing top 20 of 361 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47235

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