CVE-2024-46679
Severity:
MEDIUM
Type:
Unavailable / Other
Publication date:
13/09/2024
Last modified:
23/09/2024
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
ethtool: check device is present when getting link settings<br />
<br />
A sysfs reader can race with a device reset or removal, attempting to<br />
read device state when the device is not actually present. eg:<br />
<br />
[exception RIP: qed_get_current_link+17]<br />
#8 [ffffb9e4f2907c48] qede_get_link_ksettings at ffffffffc07a994a [qede]<br />
#9 [ffffb9e4f2907cd8] __rh_call_get_link_ksettings at ffffffff992b01a3<br />
#10 [ffffb9e4f2907d38] __ethtool_get_link_ksettings at ffffffff992b04e4<br />
#11 [ffffb9e4f2907d90] duplex_show at ffffffff99260300<br />
#12 [ffffb9e4f2907e38] dev_attr_show at ffffffff9905a01c<br />
#13 [ffffb9e4f2907e50] sysfs_kf_seq_show at ffffffff98e0145b<br />
#14 [ffffb9e4f2907e68] seq_read at ffffffff98d902e3<br />
#15 [ffffb9e4f2907ec8] vfs_read at ffffffff98d657d1<br />
#16 [ffffb9e4f2907f00] ksys_read at ffffffff98d65c3f<br />
#17 [ffffb9e4f2907f38] do_syscall_64 at ffffffff98a052fb<br />
<br />
crash> struct net_device.state ffff9a9d21336000<br />
state = 5,<br />
<br />
state 5 is __LINK_STATE_START (0b1) and __LINK_STATE_NOCARRIER (0b100).<br />
The device is not present, note lack of __LINK_STATE_PRESENT (0b10).<br />
<br />
This is the same sort of panic as observed in commit 4224cfd7fb65<br />
("net-sysfs: add check for netdevice being present to speed_show").<br />
<br />
There are many other callers of __ethtool_get_link_ksettings() which<br />
don&#39;t have a device presence check.<br />
<br />
Move this check into ethtool to protect all callers.
Impact
Base Score 3.x
4.70
Severity 3.x
MEDIUM
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.33 (including) | 5.4.283 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.5 (including) | 5.10.225 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.11 (including) | 5.15.166 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.16 (including) | 6.1.108 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.2 (including) | 6.6.49 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.7 (including) | 6.10.8 (excluding) |
cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/1d6d9b5b1b95bfeccb84386a51b7e6c510ec13b2
- https://git.kernel.org/stable/c/7a8d98b6d6484d3ad358510366022da080c37cbc
- https://git.kernel.org/stable/c/842a40c7273ba1c1cb30dda50405b328de1d860e
- https://git.kernel.org/stable/c/94ab317024ba373d37340893d1c0358638935fbb
- https://git.kernel.org/stable/c/9bba5955eed160102114d4cc00c3d399be9bdae4
- https://git.kernel.org/stable/c/a699781c79ecf6cfe67fb00a0331b4088c7c8466
- https://git.kernel.org/stable/c/ec7b4f7f644018ac293cb1b02528a40a32917e62