CVE-2021-46998high

ethernet:enic: Fix a use after free bug in enic_hard_start_xmit

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.2%

exploitation probability

0.2%top 86% of all CVEs

observed exploitation

nono source reports it

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

References

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