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CVE-2026-99116— net: psp: do not inherit the Rx association on clone

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： net: psp：在克隆 socket 时不继承接收（Rx）关联。位于之后，因此在从监听 socket 接受每个新连接时，会将其复制到新 socket 中，但并未增加引用计数；而会对每个 inet socket 执行一次（释放引用）。会为 TIME_WAIT 状态的 socket 调用，因此，当子 socket 通过 TIME_WAIT 状态关闭时，其自身的操作会被抵消，导致该关联仍保留一个引用，同时有 N 个 TIME_WAIT socket 持有指向

CVSS 7.8 · High EPSS 0.13% · P3 Updated Nov 01, 2026

Possible ATT&CK Techniques 2 AI

T1069.004 T1055.012 · Process Hollowing

Affected Version Matrix 8

Vendor	Product	Version Range	Status
Linux	Linux	`6b46ca260e2290e3453d1355ab5b6d283d73d780< a9f14ea73e82db743f0acf4219f499d594589288`	affected
		`6b46ca260e2290e3453d1355ab5b6d283d73d780< c962695467d3ab9738a6508279827ec33a7d2bdf`	affected
		`6b46ca260e2290e3453d1355ab5b6d283d73d780< 1d2929d0850fff683b8aff051275945e65f082c8`	affected
		`6.18`	affected
		`< 6.18`	unaffected
		`6.18.59≤ 6.18.*`	unaffected
		`7.2.13≤ 7.2.*`	unaffected
		`7.3≤ *`	unaffected

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Vulnerability Information

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Vulnerability Title

net: psp: do not inherit the Rx association on clone

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net: psp: do not inherit the Rx association on clone sk->psp_assoc sits past sk_dontcopy_end, so sock_copy() copies it into every socket accepted from a listener without taking a reference, while inet_sock_destruct() puts for every inet socket. psp_twsk_init() does refcount_inc() for the timewait socket, so a child closing through TIME_WAIT cancels its own put and leaves the association with one reference and N timewait sockets holding the same pointer. Closing the listener frees it, and the timewait timers then put freed memory. Rejecting the association on a listening socket is not sufficient: a socket can acquire one while established and then be turned back into a listener, because tcp_disconnect() leaves sk->psp_assoc in place. BUG: KASAN: slab-use-after-free in psp_twsk_assoc_free+0x6f/0xf0 Write of size 4 at addr ffff888110f9255c by task swapper/7/0 psp_twsk_assoc_free+0x6f/0xf0 inet_twsk_put+0xda/0x1b0 call_timer_fn+0x53/0x2e0 __run_timers+0x764/0xa80 Freed by task 99: kfree+0x1a7/0x500 process_one_work+0x7ec/0x1100 An association carries a per-connection SPI and key, so a child must not inherit the parent's. Clear it on clone.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	6b46ca260e2290e3453d1355ab5b6d283d73d780 ~ a9f14ea73e82db743f0acf4219f499d594589288	-
Linux	Linux	6.18	-

II. Public POCs for CVE-2026-99116

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-99116

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Patches & Fixes for CVE-2026-99116 (2)

https://www.cve.org/CVERecord?id=CVE-2026-99116

Same Patch Batch · Linux · 2026-10-28 · 117 CVEs total

CVE-2026-99153	9.8 CRITICAL	scsi: libiscsi: Validate the ITT reflected in a Reject PDU
CVE-2026-99154	9.8 CRITICAL	scsi: libiscsi: Reject a negative task index from parse_pdu_itt
CVE-2026-99185	8.8 HIGH	firewire: core: fix race condition in split transaction handling
CVE-2026-99170	8.8 HIGH	namespace: a mount that copy_tree() leaves out can't take over a lock
CVE-2026-99216	8.4 HIGH	Drivers: hv: Don't reset VMBus connection state on error/exit paths
CVE-2026-99131	8.2 HIGH	xfs: fix capability check in xfs
CVE-2026-99163	7.8 HIGH	tracing/histograms: Reject non-stacktrace fields for synthetic stacktrace fields
CVE-2026-99117	7.8 HIGH	net: bridge: mcast: don't truncate the port group walk on teardown
CVE-2026-99164	7.8 HIGH	spi: imx: fix slab corruption from undersized DMA bounce buffers
CVE-2026-99143	7.8 HIGH	tracing: Keep the predicate limit separate from program capacity
CVE-2026-99167	7.8 HIGH	net/sched: fix use-after-free in __tcf_action_put()
CVE-2026-99109	7.8 HIGH	smb: client: reject SetEA requests that do not fit the request buffer
CVE-2026-99203	7.8 HIGH	pipe: preserve existing fasync readers on writer setup failure
CVE-2026-99177	7.8 HIGH	KVM: SEV: Fix page dirtying in sev_gmem_post_populate()
CVE-2026-99213	7.8 HIGH	vsock: treat TCP_CLOSING as once-established
CVE-2026-99156	7.8 HIGH	scsi: st: Fix use-after-free race between st_remove() and st_open()
CVE-2026-99180	7.8 HIGH	unicode: free the map after a grace period
CVE-2026-99173	7.8 HIGH	eventfs: Free the eventfs_inode after an rcu grace period too
CVE-2026-99107	7.8 HIGH	ntfs: fix incorrect MFT record pointer passed to ntfs_attr_record_resize
CVE-2026-99152	7.5 HIGH	scsi: libiscsi: Validate the task named by a management response

Showing top 20 of 117 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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