CVE-2021-46998

In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976	Patch
https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3	Patch
https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3	Patch
https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1	Patch
https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24	Patch
https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3	Patch
https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976	Patch
https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3	Patch
https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3	Patch
https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1	Patch
https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24	Patch
https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-02-28 09:15

Updated : 2024-12-06 14:56

NVD link : CVE-2021-46998

Mitre link : CVE-2021-46998

CVE.ORG link : CVE-2021-46998

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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