7.8

CVE-2021-46998

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.16 < 4.19.191
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.120
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.38
Linux ≫ Linux Kernel Version >= 5.11 < 5.11.22
Linux ≫ Linux Kernel Version >= 5.12 < 5.12.5
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.151
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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