CVE-2021-47235
Linux Kernel Use-After-Free in ec_bhf_remove Functionality
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.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Dec. 30, 2024, 7:06 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47235.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-47235 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47235 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 30, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.15 up to (excluding) 4.4.274 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.274 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.238 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.196 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.128 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.46 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.13 *cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2 No Types Assigned https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2 Patch Changed Reference Type https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2 No Types Assigned https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2 Patch Changed Reference Type https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a No Types Assigned https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a Patch Changed Reference Type https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a No Types Assigned https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a Patch Changed Reference Type https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6 No Types Assigned https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6 Patch Changed Reference Type https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6 No Types Assigned https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6 Patch Changed Reference Type https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea No Types Assigned https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea Patch Changed Reference Type https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea No Types Assigned https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea Patch Changed Reference Type https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 No Types Assigned https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 Patch Changed Reference Type https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 No Types Assigned https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 Patch Changed Reference Type https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb No Types Assigned https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb Patch Changed Reference Type https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb No Types Assigned https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb Patch Changed Reference Type https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130 No Types Assigned https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130 Patch Changed Reference Type https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130 No Types Assigned https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130 Patch Changed Reference Type https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8 No Types Assigned https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8 Patch Changed Reference Type https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8 No Types Assigned https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2 Added Reference https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a Added Reference https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6 Added Reference https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea Added Reference https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 Added Reference https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb Added Reference https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130 Added Reference https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47235 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47235
weaknesses.