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redhatcveRedhat.comRH:CVE-2021-47241
HistoryMay 23, 2024 - 2:02 p.m.

CVE-2021-47241

2024-05-2314:02:38
redhat.com
access.redhat.com
1
linux
kernel
ethtool
strset
vulnerability
cve-2021-47241
resolved
message length
calculation
ethtool_a_strset_stringsets
warning
cpu
pid
netlink
string set
device
priv flags
syzbot

6.4 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.5%

In the Linux kernel, the following vulnerability has been resolved: ethtool: strset: fix message length calculation Outer nest for ETHTOOL_A_STRSET_STRINGSETS is not accounted for. This may result in ETHTOOL_MSG_STRSET_GET producing a warning like: calculated message payload length (684) not sufficient WARNING: CPU: 0 PID: 30967 at net/ethtool/netlink.c:369 ethnl_default_doit+0x87a/0xa20 and a splat. As usually with such warnings three conditions must be met for the warning to trigger: - there must be no skb size rounding up (e.g. reply_size of 684); - string set must be per-device (so that the header gets populated); - the device name must be at least 12 characters long. all in all with current user space it looks like reading priv flags is the only place this could potentially happen. Or with syzbot :)

6.4 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.5%

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