CVE-2026-45877
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]
Affected versions
Linux kernel versions
4.9
and later are affected. Fixed in
6.12.75,
6.18.14,
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45877 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/0b605e8ce60698c27a26f512968a597fd620d2e8
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PatchKernel patch commithttps://git.kernel.org/stable/c/272dac57caa981718e7188c80c703e7bb1998054
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PatchKernel patch commithttps://git.kernel.org/stable/c/56f7db581ee73af53cd512e00a6261a025bf1d58
Frequently asked questions
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What is CVE-2026-45877?
CVE-2026-45877 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.9 onward and has been patched in 6.12.75, 6.18.14, 6.19.4 and others. CVE-2026-45877 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-45877?
Yes — CVE-2026-45877 has been patched. Fixed versions include 6.12.75, 6.18.14, 6.19.4 and others. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45877 actively exploited?
No — CVE-2026-45877 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.