CVE-2021-46998

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

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ethernet:enic: corrige un error de use after free en enic_hard_start_xmit. En enic_hard_start_xmit, llama a enic_queue_wq_skb(). Dentro de enic_queue_wq_skb, si ocurre algún error, dev_kfree_skb(skb) liberará el skb. Pero el skb liberado todavía se usa en skb_tx_timestamp(skb). Mi parche hace que enic_queue_wq_skb() devuelva un error y vaya a spin_unlock() en caso de error. La solución la proporciona Govind. Consulte https://lkml.org/lkml/2021/4/30/961.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-27 CVE Reserved
2024-02-28 CVE Published
2024-02-29 EPSS Updated
2024-09-11 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (7)

URL	Tag	Source
https://git.kernel.org/stable/c/fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976	2021-05-22
https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3	2021-05-19
https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1	2021-05-19
https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3	2021-05-19
https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24	2021-05-19
https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3	2021-05-03

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.16 < 4.19.191 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16 < 4.19.191"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.16 < 5.4.120 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16 < 5.4.120"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.16 < 5.10.38 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16 < 5.10.38"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.16 < 5.11.22 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16 < 5.11.22"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.16 < 5.12.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16 < 5.12.5"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.16 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16 < 5.13"		en		Affected