CVE-2023-53516
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
41/100
Published: 2025-10-01
Modified: 2026-11-05
First seen: 2026-11-05
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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.
Weakness Classification (1)
Affected Software (7)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 < 79f44709aa7a744fbfbadd4aef678443290c6991 |
| Linux | Linux | 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 < 55cef78c244d0d076f5a75a35530ca63c92f4426 |
| Linux | Linux | 6.4 |
| linux | linux_kernel | 6.4 – 6.4.8 |
| linux | linux_kernel | 6.5 |
| linux | linux_kernel | 6.5 |
| linux | linux_kernel | 6.5 |