CVE-2026-23226

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e	Patch
https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485	Patch
https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33	Patch

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-02-18 16:22

Updated : 2026-06-17 10:21

NVD link : CVE-2026-23226

Mitre link : CVE-2026-23226

CVE.ORG link : CVE-2026-23226

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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"tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: add chann_lock to protect ksmbd_chann_list xarray\n\nksmbd_chann_list xarray lacks synchronization, allowing use-after-free in\nmulti-channel sessions (between lookup_chann_list() and ksmbd_chann_del).\n\nAdds rw_semaphore chann_lock to struct ksmbd_session and protects\nall xa_load/xa_store/xa_erase accesses."}, {"lang": "es", "value": "Se ha resuelto la siguiente vulnerabilidad en el kernel de Linux:\n\nksmbd: a\u00f1adir chann_lock para proteger ksmbd_chann_list xarray\n\nksmbd_chann_list xarray carece de sincronizaci\u00f3n, permitiendo uso despu\u00e9s de liberaci\u00f3n en sesiones multicanal (entre lookup_chann_list() y ksmbd_chann_del).\n\nA\u00f1ade el sem\u00e1foro rw_semaphore chann_lock a la estructura ksmbd_session y protege todos los accesos xa_load/xa_store/xa_erase."}], "lastModified": "2026-06-17T10:21:08.290", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AEB10F82-E8B1-4BB9-B91C-78490070AF53", "versionEndExcluding": "6.18.11", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EE543C0D-A06B-414F-A403-CB1E088F261E", "versionEndExcluding": "6.19.1", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}