Low

Linux Kernel TCP/IPv6 icsk_af_ops Race Condition

IdentifiersCVE-2022-3566CWE-366

CVE-2022-3566 is a race condition in the Linux kernel TCP/IPv6 socket handling code, introduced in Linux 2.6.12. The socket inet_connection_sock icsk_af_ops field can be modified by setsockopt(IPV6_ADDRFORM) and tcp_v6_connect() while protected by lock_sock(), but tcp_getsockopt() and tcp_setsockopt() read the same field without equivalent synchronization. Concurrent connect and socket-option operations can therefore access the field unsafely. The issue affects upstream stable kernel branches through 4.19.316, 5.4.278, 5.10.220, and 5.15.161.

For your environment

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Exploitation can disclose internal kernel or IP-related information. The reported race can also cause a kernel crash, resulting in denial of service. Red Hat’s CVSS assessment additionally attributes low confidentiality, integrity, and availability impact.

Mitigation

If you can’t patch tonight, do this now.

No qualifying workaround is available. Apply a supported fixed kernel package; systems on unsupported product versions containing the vulnerable component should be treated as vulnerable until migrated or upgraded.

Remediation

Patch, then assume compromise.

Upgrade to a kernel release containing the upstream race-condition fix: 4.19.317, 5.4.279, 5.10.221, 5.15.162, 6.1, or a later vendor-supported kernel incorporating the fix. For affected Red Hat Enterprise Linux deployments, install the applicable updated kernel or kernel-rt advisory package and reboot to load the patched kernel.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

LinuxLinux Kerneloperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

8 SOURCESView more in app

redhat accessNews

Jan 1, 2026

RHSA-2023:2458 - Security Advisory - Red Hat Customer Portal

Linux kernel IPv6 socket-option handling data-race vulnerability.

redhat accessNews

Jan 1, 2026

RHSA-2023:2148 - Security Advisory - Red Hat Customer Portal

Linux IPv6 socket-option handling data race.

redhat accessNews

Jan 1, 2026

RHSA-2023:2951 - Security Advisory - Red Hat Customer Portal

Linux kernel IPv6 socket-option data race.

redhat accessNews

Jan 1, 2026

RHSA-2023:2736 - Security Advisory - Red Hat Customer Portal

Data race in IPv6 socket-option processing.

+3 more in the timeline

What this page doesn’t show

The version that knows your environment.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity