CVE-2022-49957
kcm: fix strp_init() order and cleanup
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Description
In the Linux kernel, the following vulnerability has been resolved: kcm: fix strp_init() order and cleanup strp_init() is called just a few lines above this csk->sk_user_data check, it also initializes strp->work etc., therefore, it is unnecessary to call strp_done() to cancel the freshly initialized work. And if sk_user_data is already used by KCM, psock->strp should not be touched, particularly strp->work state, so we need to move strp_init() after the csk->sk_user_data check. This also makes a lockdep warning reported by syzbot go away.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/0946ff31d1a8778787bf6708beb20f38715267cc
- https://git.kernel.org/stable/c/1b6666964ca1de93a7bf06e122bcf3616dbd33a9
- https://git.kernel.org/stable/c/473f394953216614087f4179e55cdf0cf616a13b
- https://git.kernel.org/stable/c/55fb8c3baa8071c5d533a9ad48624e44e2a04ef5
- https://git.kernel.org/stable/c/8fc29ff3910f3af08a7c40a75d436b5720efe2bf
References (7)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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