Answer in brief
CVE-2026-45877 records a Medium severity (CVSS 5.5) vulnerability in HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <0b605e8ce60698c27a26f512968a597fd620d2e8 || >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <feb4bcfd405282de60aba321f13a1272b30c5af4 || >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <272dac57caa981718e7188c80c703e7bb1998054 || >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <56f7db581ee73af53cd512e00a6261a025bf1d58 | 0b605e8ce60698c27a26f512968a597fd620d2e8, feb4bcfd405282de60aba321f13a1272b30c5af4, 272dac57caa981718e7188c80c703e7bb1998054, 56f7db581ee73af53cd512e00a6261a025bf1d58 |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients During a warm reset flow, the cl->device pointer may be NULL if the reset occurs while clients are still being enumerated. Accessing cl->device->reference_count without a NULL check leads to a kernel panic. This issue was identified during multi-unit warm reboot stress clycles. Add a defensive NULL check for cl->device to ensure stability under such intensive testing conditions. KASAN: null-ptr-deref in range [0000000000000000-0000000000000007] Workqueue: ish_fw_update_wq fw_reset_work_fn Call Trace: ishtp_bus_remove_all_clients+0xbe/0x130 [intel_ishtp] ishtp_reset_handler+0x85/0x1a0 [intel_ishtp] fw_reset_work_fn+0x8a/0xc0 [intel_ish_ipc]
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-45877 records a Medium severity (CVSS 5.5) vulnerability in HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <0b605e8ce60698c27a26f512968a597fd620d2e8 || >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <feb4bcfd405282de60aba321f13a1272b30c5af4 || >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <272dac57caa981718e7188c80c703e7bb1998054 || >=3703f53b99e4a7c373ce3568dd3f91f175ebb626 <56f7db581ee73af53cd512e00a6261a025bf1d58 | 0b605e8ce60698c27a26f512968a597fd620d2e8, feb4bcfd405282de60aba321f13a1272b30c5af4, 272dac57caa981718e7188c80c703e7bb1998054, 56f7db581ee73af53cd512e00a6261a025bf1d58 |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients During a warm reset flow, the cl->device pointer may be NULL if the reset occurs while clients are still being enumerated. Accessing cl->device->reference_count without a NULL check leads to a kernel panic. This issue was identified during multi-unit warm reboot stress clycles. Add a defensive NULL check for cl->device to ensure stability under such intensive testing conditions. KASAN: null-ptr-deref in range [0000000000000000-0000000000000007] Workqueue: ish_fw_update_wq fw_reset_work_fn Call Trace: ishtp_bus_remove_all_clients+0xbe/0x130 [intel_ishtp] ishtp_reset_handler+0x85/0x1a0 [intel_ishtp] fw_reset_work_fn+0x8a/0xc0 [intel_ish_ipc]
Quoted source text, attributed separately from HOL analysis.