High 7.1Published Jun 24, 2026

CVE-2026-52917sctp: diag: reject stale associations in dump_one path

Updated under an hour ago (Oct 28, 2026, 3:00 PM ET)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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that happens, inet_assoc_attr_size() and inet_diag_msg_sctpasoc_fill() can still dereference association state that is no longer valid for reporting.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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 8f840e47f190cbe61a96945c13e9551048d42cef before 6657af827e21883ae90693e42e7f59a6aab690b5; from 8f840e47f190cbe61a96945c13e9551048d42cef before b2be72d401833194917e44fbd8d8144bb4f2db16; from 8f840e47f190cbe61a96945c13e9551048d42cef before 5425de8bd6e9fe5bd67d158e3348171ae7510117; from 8f840e47f190cbe61a96945c13e9551048d42cef before e97c2a535e23ed0fdd2660993fb3f10d9535c9bc; from 8f840e47f190cbe61a96945c13e9551048d42cef before 480f754580b5686b928977d16a59f20cef83ff01; from 8f840e47f190cbe61a96945c13e9551048d42cef before 78c4f964b2f94e405721c093773f6250e1e676b2; from 8f840e47f190cbe61a96945c13e9551048d42cef before f5af203dec6e0e7a6090fcc2130e9f3901bfc84d; 8f840e47f190cbe61a96945c13e9551048d42cef builds before 5eba3e48d78edd7551b992cb7ba687019b3a78da	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.7 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 5 more ranges	NVD

References

References

https://git.kernel.org/stable/c/6657af827e21883ae90693e42e7f59a6aab690b5	patch
https://git.kernel.org/stable/c/b2be72d401833194917e44fbd8d8144bb4f2db16	patch
https://git.kernel.org/stable/c/5425de8bd6e9fe5bd67d158e3348171ae7510117	patch
https://git.kernel.org/stable/c/e97c2a535e23ed0fdd2660993fb3f10d9535c9bc	patch
https://git.kernel.org/stable/c/480f754580b5686b928977d16a59f20cef83ff01	patch
https://git.kernel.org/stable/c/78c4f964b2f94e405721c093773f6250e1e676b2	patch
https://git.kernel.org/stable/c/f5af203dec6e0e7a6090fcc2130e9f3901bfc84d	patch
https://git.kernel.org/stable/c/5eba3e48d78edd7551b992cb7ba687019b3a78da	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.