CVE-2026-74662

In the Linux kernel, the following vulnerability has been resolved: inet: frags: publish queues before arming timer inet_frag_create() arms the fragment queue timer before inserting the queue into the fqdir rhashtable. If the namespace fragment timeout is zero or negative, the timer can run before the queue is published. The timer callback then marks the queue complete, tries to remove a node that is not in the hash table yet, and drops the anticipated hash reference. Creation can subsequently publish the completed queue without restoring that reference, leaving a stale hash node after the caller drops the remaining reference. Publish the queue first and arm the timer while holding the queue lock. This makes timer expiry wait until the queue is visible in the hash table, so inet_frag_kill() can remove the node and balance the hash reference.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/08a04d7bfb9c103432561aff8a62b6872e694a6a
https://git.kernel.org/stable/c/39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0
https://git.kernel.org/stable/c/4ed0681dc2c1e0538b79d2fc56190ffcb369dacd
https://git.kernel.org/stable/c/653d7ddf6cba867777a3d14c4f83ace008c5ad13
https://git.kernel.org/stable/c/928128865e43b197e30688dc1bc991592c97edcf
https://git.kernel.org/stable/c/9f904dd3e455750e5d4ec9b2f134835811b85a2f
https://git.kernel.org/stable/c/d3ffb89b2944672cf7bdd8e9ee577d2043b4a956
https://git.kernel.org/stable/c/f4e4dab62181b7fe7c011bed6fbef9fc3d48c769

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-22 16:16

Updated : 2026-08-27 13:18

NVD link : CVE-2026-74662

Mitre link : CVE-2026-74662

CVE.ORG link : CVE-2026-74662

JSON object : View

Products Affected

No product.

CWE

No CWE.

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If the namespace fragment timeout is\nzero or negative, the timer can run before the queue is published.\n\nThe timer callback then marks the queue complete, tries to remove a node\nthat is not in the hash table yet, and drops the anticipated hash\nreference. Creation can subsequently publish the completed queue without\nrestoring that reference, leaving a stale hash node after the caller drops\nthe remaining reference.\n\nPublish the queue first and arm the timer while holding the queue lock.\nThis makes timer expiry wait until the queue is visible in the hash table,\nso inet_frag_kill() can remove the node and balance the hash reference."}], "lastModified": "2026-08-27T13:18:36.303", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}