What happened
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.
Affected versions
Linux: a0d2f20650e81407d8e51ad2cbdc492861c74e9c through before fc710f89a644e030a7ca15343176ca862fd61b9d (git); a0d2f20650e81407d8e51ad2cbdc492861c74e9c through before 8d4d06d6e2b501cb8e30ed3b1924c470358e8052 (git); a0d2f20650e81407d8e51ad2cbdc492861c74e9c through before 0aaa53936419cf0c19c670387fc6d431e042a1b6 (git); a0d2f20650e81407d8e51ad2cbdc492861c74e9c through before 1f77af0aaf277413ff32f6ff8c2c4282bd64c897 (git); 4.2 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.