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CVE PROGRAM SOURCE RECORDUnscored

CVE-2023-53516

macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF

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Status
Published
Published
Updated
Assigning organization
Linux

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 to < 79f44709aa7a744fbfbadd4aef678443290c6991affected
  • 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 to < 55cef78c244d0d076f5a75a35530ca63c92f4426affected

Linux Linux

Default version status: affected

  • 6.4affected
  • 0 to < 6.4unaffected
  • 6.4.8 to ≤ 6.4.*unaffected
  • 6.5 to ≤ *unaffected

References