CVE-2022-48648

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

28/04/2024

Last modified:

14/01/2025

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&#39;t dereference it. As the above comment in the code says, this is very unlikely to happen, but it&#39;s wrong anyway so let&#39;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]

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.10 (including)	5.10.146 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.71 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	5.19.12 (excluding)
cpe:2.3:o:linux:linux_kernel:6.0:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.0:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.0:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.0:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.0:rc5::::::
cpe:2.3:o:linux:linux_kernel:6.0:rc6::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2022-48648

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools