PT-2026-4663 · Linux+3 · Linux Kernel+3
Published
2026-01-01
·
Updated
2026-06-04
·
CVE-2026-23001
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free condition exists in the
macvlan forward source() function within the macvlan module. The issue stems from a lack of proper RCU (Read-Copy-Update) protection on the vlan pointer within the macvlan source entry structure. Specifically, the vlan pointer is not cleared before the RCU grace period begins in macvlan hash del source(). This allows macvlan forward source() to potentially access memory that has been freed, leading to a use-after-free condition. The macvlan devices are already protected by RCU as they are embedded within a standard netdev.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Rocky Linux
Ubuntu