CVE-2022-48648

sfc: fix null pointer dereference in efx_hard_start_xmit

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]

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7 patch
https://git.kernel.org/stable/c/8547c7bfc0617e7184e4da65b9b96681fcfe9998 patch
https://git.kernel.org/stable/c/b3b952168ee1f220ba729fa100fd9d5aa752eb03 patch
https://git.kernel.org/stable/c/0a242eb2913a4aa3d6fbdb86559f27628e9466f3 patch

Frequently Asked Questions

What is the severity of CVE-2022-48648?
CVE-2022-48648 has been scored as a medium severity vulnerability.
How to fix CVE-2022-48648?
To fix CVE-2022-48648, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-48648 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-48648 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-48648?
CVE-2022-48648 affects Linux Linux, Linux Linux.
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