In the Linux kernel, the following vulnerability has been resolved:
net: ravb: avoid dereferencing an invalid PTP clock
The PTP clock is unavailable before the first open, so querying its
index can dereference a NULL pointer. Registration failures can also
leave an error pointer in priv->ptp.clock. Cache the PHC index separately and report -1 while no clock is
registered.
Normalize registration errors to NULL and preserve the
static timestamping capabilities.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 6
https://git.kernel.org/stable/c/0aaa53936419cf0c19c670387fc6d431e042a1b6
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1f77af0aaf277413ff32f6ff8c2c4282bd64c897
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8d4d06d6e2b501cb8e30ed3b1924c470358e8052
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fc710f89a644e030a7ca15343176ca862fd61b9d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/29ffd972531f8e6e0edf4ea3496190acff9fc9c2
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bf3308416a2be85dcc9965b614a745b40beeff14
416baaa9-dc9f-4396-8d5f-8c081fb06d67