High

CVE-2026-68162 — sctp: avoid auth_enable sysctl UAF during netns teardown

In the Linux kernel, the following vulnerability has been resolved: sctp: avoid auth_enable sysctl UAF during netns teardown proc_sctp_do_auth() updates the SCTP control socket after changing net.sctp.auth_enable. The handler gets the per-net SCTP state from ctl->data, so an already opened sysctl file can still target a network namespace while that namespace is being torn down. SCTP previously registered its per-net sysctls from sctp_defaults_init(), while the control socket is created later from sctp_ctrlsock_init(). This exposed a window during initialization where auth_enable was writable before net->sctp.ctl_sock existed, and a teardown window where auth_enable stayed writable after inet_ctl_sock_destroy() had released the control socket. Move the per-net SCTP sysctl registration into sctp_ctrlsock_init() after sctp_ctl_sock_init() succeeds, and unregister the sysctl table before destroying the control socket in sctp_ctrlsock_exit(). If sysctl registration fails after the control socket was created, destroy the control socket in the same init path. Make sctp_sysctl_net_unregister() tolerate a missing header and clear the saved pointer so init-error and exit paths can safely share the unregister helper.

Published Aug 10, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Linux

CVSS base

7.8

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 10c869a52f266e40f548cc3c565d14930a5edafc and < 19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4≥ dc583e7e5f8515ca489c0df28e4362a70eade382 and < ceb7190b5c873d4a1267a1600c5aa52c600e929f≥ bd2a2939423566c654545fa3e96a656662a0af9e and < fd66854a22661929245f3d2b244c432bc8b1a150≥ 1b67030d39f2b00f94ac1f0af11ba6657589e4d3 and < 158f3cc332dc53f43ec20060233d7c3cecd6d912≥ 7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6 and < 66700c0719675e0e118ae83b2d7168dacd69dd3d≥ c184bc621e3cef03ac9ba81a50dda2dae6a21d36 and < 626bda8cfe43dff19a9833ff6ba055a817b5455c≥ 15649fd5415eda664ef35780c2013adeb5d9c695 and < be6aae9d1b91c603adb35872d37d40e83daf8758≥ 15649fd5415eda664ef35780c2013adeb5d9c695 and < a50e73488e0bbdd262b3be3c9a1d8dd078382381 and 8 more ≥ 15649fd5415eda664ef35780c2013adeb5d9c695 and < f8d5e7846025f4ab15a461235f8ebae9094a361a≥ 5.4.290 and < 5.4.292≥ 5.10.234 and < 5.10.266≥ 5.15.177 and < 5.15.217≥ 6.1.125 and < 6.1.184≥ 6.6.72 and < 6.6.151≥ 6.12.10 and < 6.12.101version 6.13	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.8	CVSS 3.1	High	1.8	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.8	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.8
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 10, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

9 on the record

git.kernel.org/stable/c/158f3cc332dc53f43ec20060233d7c3cecd6d912
NIST National Vulnerability Database
git.kernel.org/stable/c/626bda8cfe43dff19a9833ff6ba055a817b5455c
NIST National Vulnerability Database
git.kernel.org/stable/c/66700c0719675e0e118ae83b2d7168dacd69dd3d
NIST National Vulnerability Database
git.kernel.org/stable/c/be6aae9d1b91c603adb35872d37d40e83daf8758
NIST National Vulnerability Database
git.kernel.org/stable/c/f8d5e7846025f4ab15a461235f8ebae9094a361a
NIST National Vulnerability Database
git.kernel.org/stable/c/a50e73488e0bbdd262b3be3c9a1d8dd078382381
NIST National Vulnerability Database
git.kernel.org/stable/c/19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4
NIST National Vulnerability Database
git.kernel.org/stable/c/fd66854a22661929245f3d2b244c432bc8b1a150
NIST National Vulnerability Database
git.kernel.org/stable/c/ceb7190b5c873d4a1267a1600c5aa52c600e929f
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 12h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 12h
Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-68162 is "sctp: avoid auth_enable sysctl UAF during netns teardown", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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