Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net/packet: avoid fanout hook re-registration after unregister packet_set_ring() temporarily detaches a socket from packet delivery while reconfiguring its ring. It records the previous running state, clears po->num, unregisters the protocol hook when needed, drops po->bind_lock, and later restores po->num and re-registers the hook from the saved was_running value. That unlocked window can race with NETDEV_UNREGISTER. The notifier can observe the socket as not running, skip __unregister_prot_hook(), and invalidate the per-socket binding by setting po->ifindex to -1 and clearing po->prot_hook.dev. A one-member fanout group can still retain its shared fanout hook device pointer. When packet_set_ring() resumes, re-registering solely from the stale was_running state can re-add the fanout hook after the device has been unregistered. Treat po->ifindex == -1 as an invalidated binding after reacquiring po->bind_lock. This is distinct from ifindex 0, the normal unbound/wildcard state: ifindex -1 marks an existing device binding that was invalidated when the device was unregistered. Restore po->num as before, but do not re-register the hook if device unregister already detached the socket.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before acb40ebfa5c4d62f84339fcbf713f2a9fd033a71; affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before c820f4b7f2fa38f8769db0d0cefdd94e2721504d; affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before 4628efbdc7affd094181f5263e65c1062e31f15f; affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before 80ec024d53a05c60ad1d08968dcf745f10c1665c; affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before 0a052e0808e015e68144a9877e6ef42b952c49fa; affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before 1bc55c29cd85818e9052f17deb287d5a11fb817f; affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before a885387dae7986a55bae5c77a15bdd447f64e9b9; affected dc99f600698dcac69b8f56dda9a8a00d645c5ffc before 50aff80475abd3533eef4320477037e6fcc6b56e |
| Linux / Linux | affected 3.1; unaffected 0 before 3.1; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.148 through 6.6.*; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/acb40ebfa5c4d62f84339fcbf713f2a9fd033a71
- https://git.kernel.org/stable/c/c820f4b7f2fa38f8769db0d0cefdd94e2721504d
- https://git.kernel.org/stable/c/4628efbdc7affd094181f5263e65c1062e31f15f
- https://git.kernel.org/stable/c/80ec024d53a05c60ad1d08968dcf745f10c1665c
- https://git.kernel.org/stable/c/0a052e0808e015e68144a9877e6ef42b952c49fa
- https://git.kernel.org/stable/c/1bc55c29cd85818e9052f17deb287d5a11fb817f
- https://git.kernel.org/stable/c/a885387dae7986a55bae5c77a15bdd447f64e9b9
- https://git.kernel.org/stable/c/50aff80475abd3533eef4320477037e6fcc6b56e
ADP enrichment
No English description supplied.
No references supplied.