vulnerability
Ubuntu: (CVE-2022-48648): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | 2024-04-28 | 2024-11-19 | 2025-03-19 |
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]
Solution(s)
References
- CVE-2022-48648
- https://attackerkb.com/topics/CVE-2022-48648
- URL-https://git.kernel.org/linus/0a242eb2913a4aa3d6fbdb86559f27628e9466f3
- URL-https://git.kernel.org/stable/c/0a242eb2913a4aa3d6fbdb86559f27628e9466f3
- URL-https://git.kernel.org/stable/c/8547c7bfc0617e7184e4da65b9b96681fcfe9998
- URL-https://git.kernel.org/stable/c/b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7
- URL-https://git.kernel.org/stable/c/b3b952168ee1f220ba729fa100fd9d5aa752eb03
- URL-https://www.cve.org/CVERecord?id=CVE-2022-48648
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.