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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

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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47013
NVD Published Date:
02/28/2024
NVD Last Modified:
12/09/2024
Source:
kernel.org