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CVE-2023-53516

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.
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HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version < 79f44709aa7a744fbfbadd4aef678443290c6991
Version 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348
Status affected
Version < 55cef78c244d0d076f5a75a35530ca63c92f4426
Version 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.4
Status affected
Version < 6.4
Version 0
Status unaffected
Version <= 6.4.*
Version 6.4.8
Status unaffected
Version <= *
Version 6.5
Status unaffected
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.069
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String