CVE-2024-26739

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

03/04/2024

Last modified:

04/06/2025

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mirred: don&#39;t override retval if we already lost the skb If we&#39;re redirecting the skb, and haven&#39;t called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF. Move the retval override to the error path which actually need it.

Impact

Vector 3.x

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x

7.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.19 (including)	6.6.19 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.7.7 (excluding)
cpe:2.3:o:linux:linux_kernel:6.8:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.8:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.8:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.8:rc4::::::

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

CVE-2024-26739

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools