CVE-2022-48648

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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

sfc: fix null pointer dereference in efx_hard_start_xmit

Trying to get the channel from the tx_queue variable here is wrong because we can only be here if tx_queue is NULL, so we shouldn't dereference it. As the above comment in the code says, this is very unlikely to happen, but it's wrong anyway so let's fix it.

I hit this issue because of a different bug that caused tx_queue to be NULL. If that happens, this is the error message that we get here: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
LinuxLinux>= 12804793b17c0e19115a90d98f2f3df0cb79e233, < b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7; >= 12804793b17c0e19115a90d98f2f3df0cb79e233, < 8547c7bfc0617e7184e4da65b9b96681fcfe9998; >= 12804793b17c0e19115a90d98f2f3df0cb79e233, < b3b952168ee1f220ba729fa100fd9d5aa752eb03; >= 12804793b17c0e19115a90d98f2f3df0cb79e233, < 0a242eb2913a4aa3d6fbdb86559f27628e9466f3
LinuxLinux5.10

References

Timeline

Published
Apr 28, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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