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]

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0b605e8ce60698c27a26f512968a597fd620d2e8	Patch
https://git.kernel.org/stable/c/272dac57caa981718e7188c80c703e7bb1998054	Patch
https://git.kernel.org/stable/c/56f7db581ee73af53cd512e00a6261a025bf1d58	Patch
https://git.kernel.org/stable/c/feb4bcfd405282de60aba321f13a1272b30c5af4	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-05-27 14:17

Updated : 2026-06-25 21:11

NVD link : CVE-2026-45877

Mitre link : CVE-2026-45877

CVE.ORG link : CVE-2026-45877

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

{"id": "CVE-2026-45877", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3703f53b99e4a7c373ce3568dd3f91f175ebb626", "lessThan": "0b605e8ce60698c27a26f512968a597fd620d2e8", "versionType": "git"}, {"status": "affected", "version": "3703f53b99e4a7c373ce3568dd3f91f175ebb626", "lessThan": "feb4bcfd405282de60aba321f13a1272b30c5af4", "versionType": "git"}, {"status": "affected", "version": "3703f53b99e4a7c373ce3568dd3f91f175ebb626", "lessThan": "272dac57caa981718e7188c80c703e7bb1998054", "versionType": "git"}, {"status": "affected", "version": "3703f53b99e4a7c373ce3568dd3f91f175ebb626", "lessThan": "56f7db581ee73af53cd512e00a6261a025bf1d58", "versionType": "git"}], "programFiles": ["drivers/hid/intel-ish-hid/ishtp/bus.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.9"}, {"status": "unaffected", "version": "0", "lessThan": "4.9", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.14", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.4", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hid/intel-ish-hid/ishtp/bus.c"], "defaultStatus": "affected"}]}], "published": "2026-05-27T14:17:01.397", "references": [{"url": "https://git.kernel.org/stable/c/0b605e8ce60698c27a26f512968a597fd620d2e8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/272dac57caa981718e7188c80c703e7bb1998054", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/56f7db581ee73af53cd512e00a6261a025bf1d58", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/feb4bcfd405282de60aba321f13a1272b30c5af4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "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]"}], "lastModified": "2026-06-25T21:11:50.480", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "92ADFD56-FA39-4DE6-9CF7-BCDABCA8FF06", "versionEndExcluding": "6.12.75", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}