CVE-2021-47159high

net: dsa: fix a crash if ->get_sset_count() fails

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.2%

exploitation probability

0.2%top 86% of all CVEs

observed exploitation

nono source reports it

In the Linux kernel, the following vulnerability has been resolved: net: dsa: fix a crash if ->get_sset_count() fails If ds->ops->get_sset_count() fails then it "count" is a negative error code such as -EOPNOTSUPP. Because "i" is an unsigned int, the negative error code is type promoted to a very high value and the loop will corrupt memory until the system crashes. Fix this by checking for error codes and changing the type of "i" to just int.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/0f2cb08c57edefb0e7b5045e0e3e9980a3d3aa37 https://git.kernel.org/stable/c/7b22466648a4f8e3e94f57ca428d1531866d1373 https://git.kernel.org/stable/c/a269333fa5c0c8e53c92b5a28a6076a28cde3e83 https://git.kernel.org/stable/c/caff86f85512b8e0d9830e8b8b0dfe13c68ce5b6 https://git.kernel.org/stable/c/ce5355f140a7987011388c7e30c4f8fbe180d3e8