Privileged kernel crash via uninitialized timestamp tracker
Published Sep 19, 2025 · Updated Sep 19, 2025
NULL pointer dereference in the Linux kernel ICE driver allows local users to crash the kernel by resetting an Intel E810 network device. The ice_ll_ts_intr function reads the ice_ptp_tx in_use bitmap before confirming that the timestamp tracker is initialized, permitting a NULL dereference or access after teardown. Triggering the faulty interrupt path requires CAP_NET_ADMIN in the initial user namespace, a physical Intel E810 PCI NIC, and a device reset; the bounded consequence is a kernel crash.
Summary
What happened
NULL pointer dereference in the Linux kernel ICE driver allows local users to crash the kernel by resetting an Intel E810 network device. The ice_ll_ts_intr function reads the ice_ptp_tx in_use bitmap before confirming that the timestamp tracker is initialized, permitting a NULL dereference or access after teardown. Triggering the faulty interrupt path requires CAP_NET_ADMIN in the initial user namespace, a physical Intel E810 PCI NIC, and a device reset; the bounded consequence is a kernel crash.
The record
- CVE
- CVE-2025-39854
- Published
- Sep 19, 2025
- Updated
- Sep 19, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Sep 19, 2025CVE publishedPublication date reported by the CVE source.
- Sep 19, 2025Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=6.8
- Affected versionversion=82e71b226e0ef770d7bc143701c8b4960b4eb3d5 <2cde98a02da958357fe240a6ba269b69d913b6ba
- Affected versionversion=82e71b226e0ef770d7bc143701c8b4960b4eb3d5 <923c267bdbb64f65bc1149d184efcf8b047d7d64
- Affected versionversion=82e71b226e0ef770d7bc143701c8b4960b4eb3d5 <f6486338fde3f04ed0ec59fe67a69a208c32734f
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What is affected?
Published CVSS scores
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Attacks
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Technologies
Your stack
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Your stack
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