CVE-2024-46679

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-46679
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46679.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-46679
Downstream
Related
Published
2024-09-13T06:15:12Z
Modified
2025-08-09T20:01:27Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

ethtool: check device is present when getting link settings

A sysfs reader can race with a device reset or removal, attempting to read device state when the device is not actually present. eg:

 [exception RIP: qed_get_current_link+17]

#8 [ffffb9e4f2907c48] qedegetlinkksettings at ffffffffc07a994a [qede] #9 [ffffb9e4f2907cd8] _rhcallgetlinkksettings at ffffffff992b01a3 #10 [ffffb9e4f2907d38] _ethtoolgetlinkksettings at ffffffff992b04e4 #11 [ffffb9e4f2907d90] duplexshow at ffffffff99260300 #12 [ffffb9e4f2907e38] devattrshow at ffffffff9905a01c #13 [ffffb9e4f2907e50] sysfskfseqshow at ffffffff98e0145b #14 [ffffb9e4f2907e68] seqread at ffffffff98d902e3 #15 [ffffb9e4f2907ec8] vfsread at ffffffff98d657d1 #16 [ffffb9e4f2907f00] ksysread at ffffffff98d65c3f #17 [ffffb9e4f2907f38] dosyscall_64 at ffffffff98a052fb

crash> struct net_device.state ffff9a9d21336000 state = 5,

state 5 is _LINKSTATESTART (0b1) and _LINKSTATENOCARRIER (0b100). The device is not present, note lack of _LINKSTATE_PRESENT (0b10).

This is the same sort of panic as observed in commit 4224cfd7fb65 ("net-sysfs: add check for netdevice being present to speed_show").

There are many other callers of _ethtoolgetlinkksettings() which don't have a device presence check.

Move this check into ethtool to protect all callers.

References

Affected packages