CVE-2026-74436

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74436

Key Details

CVE	CVE-2026-74436
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

rxrpc: serialize kernel accept preallocation with socket teardown

rxrpc_kernel_charge_accept() reads rx->backlog without any

socket/backlog synchronization and passes that raw pointer into

rxrpc_service_prealloc_one(). A concurrent rxrpc_discard_prealloc()

sets rx->backlog = NULL and frees the backlog rings, so a kernel

preallocation worker can keep using a freed struct rxrpc_backlog

while updating *_backlog_head/tail and array slots.

Serialize the state check and backlog lookup with the socket lock,

and reject kernel preallocation once teardown has disabled

listening or discarded the service backlog. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74436
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74436

Source

Reference

NVD

CVE