Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 3.3%
CVSS Severity
CVSS v3 Score 7.8
References
Products affected by CVE-2023-53516
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cpe:2.3:o:linux:linux_kernel:6.4
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cpe:2.3:o:linux:linux_kernel:6.4.1
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cpe:2.3:o:linux:linux_kernel:6.4.2
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cpe:2.3:o:linux:linux_kernel:6.4.3
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cpe:2.3:o:linux:linux_kernel:6.4.4
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cpe:2.3:o:linux:linux_kernel:6.4.5
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cpe:2.3:o:linux:linux_kernel:6.4.6
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cpe:2.3:o:linux:linux_kernel:6.4.7
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cpe:2.3:o:linux:linux_kernel:6.5