CVE-2021-46998
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedFeb 28, 2024
First seenFeb 28, 2024
How to fix
Update
- linux linux_kernel4.19.191, 5.4.120, 5.10.38, 5.11.22, 5.12.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.16 ≤ v < 4.19.191, 4.20 ≤ v < 5.4.120, 5.5 ≤ v < 5.10.38, 5.11 ≤ v < 5.11.22, 5.12 ≤ v < 5.12.5 | 4.19.191, 5.4.120, 5.10.38, 5.11.22, 5.12.5 |
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