{"id":"CVE-2026-45877","title":"HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients\n\nDuring a warm reset flow, the cl->device pointer may be NULL if the\nreset occurs while clients a…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < cde7f709d1025dadfc52e903e43981c1644bd8bd","Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < 0b605e8ce60698c27a26f512968a597fd620d2e8","Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < feb4bcfd405282de60aba321f13a1272b30c5af4","Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < 272dac57caa981718e7188c80c703e7bb1998054","Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < 56f7db581ee73af53cd512e00a6261a025bf1d58","Linux 4.9"],"published":"2026-05-27","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:40:54.404Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45877","references":[{"url":"https://git.kernel.org/stable/c/cde7f709d1025dadfc52e903e43981c1644bd8bd"},{"url":"https://git.kernel.org/stable/c/0b605e8ce60698c27a26f512968a597fd620d2e8"},{"url":"https://git.kernel.org/stable/c/feb4bcfd405282de60aba321f13a1272b30c5af4"},{"url":"https://git.kernel.org/stable/c/272dac57caa981718e7188c80c703e7bb1998054"},{"url":"https://git.kernel.org/stable/c/56f7db581ee73af53cd512e00a6261a025bf1d58"}],"tags":["cve.org"],"epss":0.00162,"epssPercentile":0.04995,"ingestedAt":"2026-10-21T12:48:53.636Z","slug":"CVE-2026-45877","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nHID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients\n\nDuring a warm reset flow, the cl->device pointer may be NULL if the\nreset occurs while clients are still being enumerated. Accessing\ncl->device->reference_count without a NULL check leads to a kernel panic.\n\nThis issue was identified during multi-unit warm reboot stress clycles.\nAdd a defensive NULL check for cl->device to ensure stability under\nsuch intensive testing conditions.\n\nKASAN: null-ptr-deref in range [0000000000000000-0000000000000007]\nWorkqueue: ish_fw_update_wq fw_reset_work_fn\n\nCall Trace:\n ishtp_bus_remove_all_clients+0xbe/0x130 [intel_ishtp]\n ishtp_reset_handler+0x85/0x1a0 [intel_ishtp]\n fw_reset_work_fn+0x8a/0xc0 [intel_ish_ipc]\n\n## Affected\n\n- `Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < cde7f709d1025dadfc52e903e43981c1644bd8bd`\n- `Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < 0b605e8ce60698c27a26f512968a597fd620d2e8`\n- `Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < feb4bcfd405282de60aba321f13a1272b30c5af4`\n- `Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < 272dac57caa981718e7188c80c703e7bb1998054`\n- `Linux >= 3703f53b99e4a7c373ce3568dd3f91f175ebb626 < 56f7db581ee73af53cd512e00a6261a025bf1d58`\n- `Linux 4.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}