CVE-2026-68133 ice: fix PTP Call Trace during PTP release
A null pointer dereference in the Linux kernel ice driver causes a system crash during PTP release when a PF reset occurs in an uninitialized state.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68133?
CVE-2026-68133 is a vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ice: fix PTP Call Trace during PTP release
If a PF reset occurs when the PTP state is ICE_PTP_UNINIT, then ice_ptp_rebuild() will update the state to ICE_PTP_ERROR. This will result in the following PTP release call trace during driver unload:
kernel BUG at lib/list_debug.c:52! ice_ptp_release+0x332/0x3c0 [ice] ice_deinit_features.part.0+0x10e/0x120 [ice] ice_remove+0x100/0x220 [ice]
This was observed when passing PF1 through to a VM. ice_ptp_init() fails because ctrl_pf is NULL and sets the state to ICE_PTP_UNINIT.
Fix by detecting the ICE_PTP_UNINIT state in ice_ptp_rebuild() and returning without error, preventing the invalid state transition to ICE_PTP_ERROR. The only valid path to ICE_PTP_ERROR is from ICE_PTP_RESETTING after a failed rebuild.
Which versions are affected by CVE-2026-68133?
How do I fix CVE-2026-68133?
Apply the vendor's patch.
Is CVE-2026-68133 being exploited?
There is no known exploitation of CVE-2026-68133 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68133, DEBIAN-CVE-2026-68133, GHSA-fv8x-x8x6-cwcr, UBUNTU-CVE-2026-68133.