vulnerability
Ubuntu: (CVE-2021-46998): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:S/C:C/I:C/A:C) | Feb 28, 2024 | Nov 19, 2024 | Sep 1, 2025 |
Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
Feb 28, 2024
Added
Nov 19, 2024
Modified
Sep 1, 2025
Description
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.
Solutions
ubuntu-upgrade-linuxubuntu-upgrade-linux-awsubuntu-upgrade-linux-aws-5-4ubuntu-upgrade-linux-aws-fipsubuntu-upgrade-linux-azureubuntu-upgrade-linux-azure-5-4ubuntu-upgrade-linux-azure-fipsubuntu-upgrade-linux-bluefieldubuntu-upgrade-linux-fipsubuntu-upgrade-linux-gcpubuntu-upgrade-linux-gcp-5-4ubuntu-upgrade-linux-gcp-fipsubuntu-upgrade-linux-gkeopubuntu-upgrade-linux-hwe-5-4ubuntu-upgrade-linux-kvmubuntu-upgrade-linux-oracleubuntu-upgrade-linux-oracle-5-4ubuntu-upgrade-linux-raspiubuntu-upgrade-linux-raspi-5-4
References
- CVE-2021-46998
- https://attackerkb.com/topics/CVE-2021-46998
- CWE-416
- URL-https://git.kernel.org/linus/643001b47adc844ae33510c4bb93c236667008a3
- URL-https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976
- URL-https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3
- URL-https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3
- URL-https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1
- URL-https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24
- URL-https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3
- URL-https://www.cve.org/CVERecord?id=CVE-2021-46998
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