U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-47013 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..). If some error happens in emac_tx_fill_tpd(), the skb will be freed via dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd(). But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len). As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len, thus my patch assigns skb->len to 'len' before the possible free and use 'len' instead of skb->len later.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834
https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d
https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57
https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7
https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d
https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955
https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322
https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47013
NVD Published Date:
02/28/2024
NVD Last Modified:
02/28/2024
Source:
kernel.org