VulnerabilityPublished 27 May 2026Updated 21 Oct 2026

CVE-2026-45877: Linux kernel · HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in feb4bcfd405282de60aba321f13a1272b30c5af4 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in feb4bcfd405282de60aba321f13a1272b30c5af4, cde7f709d1025dadfc52e903e43981c1644bd8bd, 272dac57caa981718e7188c80c703e7bb1998054 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 27 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3703f53b99e4a7c373ce3568dd3f91f175ebb626, < feb4bcfd405282de60aba321f13a1272b30c5af4	Fixed in feb4bcfd405282de60aba321f13a1272b30c5af4
LinuxLinux	Affected ≥ 3703f53b99e4a7c373ce3568dd3f91f175ebb626, < cde7f709d1025dadfc52e903e43981c1644bd8bd	Fixed in cde7f709d1025dadfc52e903e43981c1644bd8bd
LinuxLinux	Affected ≥ 3703f53b99e4a7c373ce3568dd3f91f175ebb626, < 272dac57caa981718e7188c80c703e7bb1998054	Fixed in 272dac57caa981718e7188c80c703e7bb1998054
LinuxLinux	Affected ≥ 3703f53b99e4a7c373ce3568dd3f91f175ebb626, < 56f7db581ee73af53cd512e00a6261a025bf1d58	Fixed in 56f7db581ee73af53cd512e00a6261a025bf1d58
LinuxLinux	Affected ≥ 3703f53b99e4a7c373ce3568dd3f91f175ebb626, < 0b605e8ce60698c27a26f512968a597fd620d2e8	Fixed in 0b605e8ce60698c27a26f512968a597fd620d2e8
LinuxLinux	Affected =4.9	Fixed in–

Description

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]

References

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