{"id":"CVE-2026-45877","state":"PUBLISHED","title":"HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients","description":"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 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]","publishedAt":"2026-05-27T12:16:46.910Z","updatedAt":"2026-10-30T12:25:39.136Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"08baf418d79d289a7bc38be519289b3a48b83da9","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"cde7f709d1025dadfc52e903e43981c1644bd8bd","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"0b605e8ce60698c27a26f512968a597fd620d2e8","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"feb4bcfd405282de60aba321f13a1272b30c5af4","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"272dac57caa981718e7188c80c703e7bb1998054","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"56f7db581ee73af53cd512e00a6261a025bf1d58","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/intel-ish-hid/ishtp/bus.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.9","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/intel-ish-hid/ishtp/bus.c"]}],"references":["https://git.kernel.org/stable/c/08baf418d79d289a7bc38be519289b3a48b83da9","https://git.kernel.org/stable/c/cde7f709d1025dadfc52e903e43981c1644bd8bd","https://git.kernel.org/stable/c/0b605e8ce60698c27a26f512968a597fd620d2e8","https://git.kernel.org/stable/c/feb4bcfd405282de60aba321f13a1272b30c5af4","https://git.kernel.org/stable/c/272dac57caa981718e7188c80c703e7bb1998054","https://git.kernel.org/stable/c/56f7db581ee73af53cd512e00a6261a025bf1d58"],"weaknesses":[],"ingestedAt":"2026-10-30T12:42:04.495Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45877.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45877","state":"PUBLISHED","datePublished":"2026-05-27T12:16:46.910Z","dateUpdated":"2026-10-30T12:25:39.136Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.081Z"},"containers":{"cna":{"title":"HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients","descriptions":[{"lang":"en","value":"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 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]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"08baf418d79d289a7bc38be519289b3a48b83da9","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"cde7f709d1025dadfc52e903e43981c1644bd8bd","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"0b605e8ce60698c27a26f512968a597fd620d2e8","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"feb4bcfd405282de60aba321f13a1272b30c5af4","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"272dac57caa981718e7188c80c703e7bb1998054","versionType":"git"},{"version":"3703f53b99e4a7c373ce3568dd3f91f175ebb626","status":"affected","lessThan":"56f7db581ee73af53cd512e00a6261a025bf1d58","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/intel-ish-hid/ishtp/bus.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.9","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/intel-ish-hid/ishtp/bus.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/08baf418d79d289a7bc38be519289b3a48b83da9"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:25:39.136Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}