VYPR
← All advisories
High severity7.8NVD Advisory· Published Oct 1, 2025· Updated Apr 6, 2026

CVE-2023-53516

CVE-2023-53516

Description

In the Linux kernel, the following vulnerability has been resolved:

macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF

The previous commit 954d1fa1ac93 ("macvlan: Add netlink attribute for broadcast cutoff") added one additional attribute named IFLA_MACVLAN_BC_CUTOFF to allow broadcast cutfoff.

However, it forgot to describe the nla_policy at macvlan_policy (drivers/net/macvlan.c). Hence, this suppose NLA_S32 (4 bytes) integer can be faked as empty (0 bytes) by a malicious user, which could leads to OOB in heap just like CVE-2023-3773.

To fix it, this commit just completes the nla_policy description for IFLA_MACVLAN_BC_CUTOFF. This enforces the length check and avoids the potential OOB read.

Affected products

4
  • Linux/Kernel4 versions
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.4,<6.4.8
    • cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*

Patches

2
79f44709aa7a
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
55cef78c244d
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

News mentions

0

No linked articles in our index yet.