CVE-2021-46998
ethernet:enic: Fix a use after free bug in enic_hard_start_xmit
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.
INFO
Published Date :
Feb. 28, 2024, 9:15 a.m.
Last Modified :
Dec. 6, 2024, 2:56 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Linux kernel packages to a patched version.
- Reboot the system to apply the updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-46998.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-46998 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-46998
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-46998 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-46998 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Dec. 06, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.16 up to (excluding) 4.19.191 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.120 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.38 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.22 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.5 Changed Reference Type https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976 No Types Assigned https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976 Patch Changed Reference Type https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976 No Types Assigned https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976 Patch Changed Reference Type https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3 No Types Assigned https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3 Patch Changed Reference Type https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3 No Types Assigned https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3 Patch Changed Reference Type https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3 No Types Assigned https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3 Patch Changed Reference Type https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3 No Types Assigned https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3 Patch Changed Reference Type https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1 No Types Assigned https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1 Patch Changed Reference Type https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1 No Types Assigned https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1 Patch Changed Reference Type https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24 No Types Assigned https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24 Patch Changed Reference Type https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24 No Types Assigned https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24 Patch Changed Reference Type https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3 No Types Assigned https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3 Patch Changed Reference Type https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3 No Types Assigned https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976 Added Reference https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3 Added Reference https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3 Added Reference https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1 Added Reference https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24 Added Reference https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 28, 2024
Action Type Old Value New Value Added 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. Added Reference Linux https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3 [No types assigned]