Ubuntu.comUB:CVE-2021-46998CVE-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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 20.04 | noarch | linux | < 5.4.0-80.90 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1054.57 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1055.57 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-azure-5.4 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-bluefield | < 5.4.0-1016.19 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gcp | < 5.4.0-1049.53 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-gcp-5.4 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gkeop | < 5.4.0-1021.22 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-hwe-5.4 | < any | UNKNOWN |
References
git.kernel.org/linus/643001b47adc844ae33510c4bb93c236667008a3 (5.13-rc1)
git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976
git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3
git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3
git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1
git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24
git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3
launchpad.net/bugs/cve/CVE-2021-46998
nvd.nist.gov/vuln/detail/CVE-2021-46998
security-tracker.debian.org/tracker/CVE-2021-46998
www.cve.org/CVERecord?id=CVE-2021-46998
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