Linux Kernel SCTP network stack Out-Of-Bounds Read Rated 7.1 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-52917

Key Details

CVE	CVE-2026-52917
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel and Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classified as	CWE-125 (Out-of-bounds Read)
Exploitation prediction (EPSS)	0.13% probability of exploitation in the next 30 days (2% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Siemens

SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Subsystems	Controllers & Field I/O, OT Supporting Infrastructure
Sectors	All Sectors

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

sctp: diag: reject stale associations in dump_one path

The SCTP exact sock_diag lookup can hold a transport reference, block on

lock_sock(sk), and then resume after sctp_association_free() has marked

the association dead and freed its bind address list.

When that happens, inet_assoc_attr_size() and

inet_diag_msg_sctpasoc_fill() can still dereference association state

that is no longer valid for reporting. In particular,

inet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a

real sctp_sockaddr_entry and trigger an out-of-bounds read from

unrelated association memory.

Reject the association after taking the socket lock if it has been

reaped or detached from the endpoint, and report the lookup as stale.

This keeps the exact dump-one path from formatting torn association

state. (NVD)

Monitor Linux's and Siemens's web pages for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-52917
CVE	https://www.cve.org/CVERecord?id=CVE-2026-52917

Source

Reference

NVD

CVE