CVE-2022-48648: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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]

Affected products

• Linux Linux Kernel: from 5.10, before 5.10.146 (fixed in 5.10.146); from 5.11, before 5.15.71 (fixed in 5.15.71); from 5.16, before 5.19.12 (fixed in 5.19.12); version 6.0 only

Published 2024-04-28. Last modified 2026-06-17.