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CVE-2014-0196 (Linux Kernel Race Condition)

CVE-2014-0196 is a race condition vulnerability in Linux Kernel. CISA added it to the Known Exploited Vulnerabilities catalogue on 12 May 2023, which means attackers have used it in real attacks. Organisations running the affected product should apply the vendor fix or mitigation as a priority.

What a Linux kernel race condition means

A race condition in the Linux kernel means two or more execution paths can reach a shared resource or security-sensitive state in an unsafe order. When that timing flaw is exploitable, an attacker may be able to trigger behaviour the kernel never intended, from denial of service to privilege abuse.

For a kernel flaw, the danger is amplified because the bug sits below normal application controls. A successful exploit can affect process isolation, permissions, memory handling, or other core operating-system guarantees, which is why the CVE Program exists to standardise identification and tracking of vulnerabilities such as this one.

Why this class of vulnerability is dangerous

Race conditions are hard to reproduce, hard to test exhaustively, and often depend on precise scheduling, concurrency, or resource contention. That makes them especially troublesome in low-level code, where a narrow timing window can turn an ordinary logic flaw into a real exploit path.

In kernel space, the consequences can be broader than a single crash. A race may let an attacker bypass intended checks, corrupt state, or interfere with access control decisions, and those effects can cascade into host compromise. Broad vulnerability records and triage data are maintained in the NIST National Vulnerability Database, which is often the first place teams confirm the scope and status of a CVE.

For practitioners, the key point is that a race condition is not just a code-quality issue. In an exploited kernel path, it becomes a control-failure problem because the attacker is trying to make the system observe the wrong state at the wrong time.

Exposure and remediation considerations

Exposure review starts with knowing where the Linux kernel is running, which systems depend on it, and whether the vulnerable code path can be reached in your environment. For internet-facing Linux hosts, embedded systems, and shared infrastructure, the question is not only whether the package is installed, but whether the vulnerable behaviour is reachable under real workloads.

When patching cannot happen immediately, organisations should reduce exposure by limiting unnecessary local access, shrinking the attack surface, and tightening monitoring around privileged activity and unusual kernel behaviour. The broader vulnerability-management process, including asset scope, prioritisation, exceptions, and verification, is well covered in Vulnerability Management Guide.

For this CVE, the practical remediation priority is to apply the vendor fix or mitigation as soon as the supported environment allows. If you need authoritative version and patch specifics, use the vendor advisory and the CISA KEV catalogue rather than relying on secondary summaries.

Detection and compromise review

After patching, teams should still review whether exploitation may already have occurred. Kernel exploits can leave indirect signs, such as unexpected crashes, privilege anomalies, unexplained process behaviour, or evidence of suspicious local activity on systems that should not normally receive such access.

Because exploitation can affect the host’s trust boundary, post-patch review should include log inspection, integrity checks, and a look for persistence mechanisms or secondary payloads that may have been introduced during compromise. The right lens is not only “is the bug fixed?” but also “did the attacker use it before we fixed it?”

If the affected host supported privileged sessions, service accounts, or stored secrets, those should be reviewed and rotated where compromise is plausible, because kernel-level access can undermine whatever those credentials were protecting.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

CIS Controls v8, NIST CSF 2.0 and NIST SP 800-53 Rev 5 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.

Framework Control / Reference Relevance
CIS Controls v8 CIS-7 — Continuous Vulnerability Management This CVE needs prioritisation, patching, and verification of remediation.
Recommendation — Prioritise this kernel flaw in your vulnerability management process and verify remediation across exposed assets.
NIST CSF 2.0 GV.RM-01 — Risk Management Strategy The CVE requires risk-based prioritisation and remediation timing decisions.
Recommendation — Treat this CVE as a risk-management input and prioritise remediation by exposure and business impact.
NIST SP 800-53 Rev 5 SI-2 — Flaw Remediation The subject is a software flaw requiring timely vendor fix or mitigation.
RA-5 — Vulnerability Monitoring and Scanning Exposure must be identified through inventory and scanning of affected Linux assets.
Recommendation — Track, remediate, and verify kernel flaw fixes under SI-2 processes. Use vulnerability scanning and asset inventory to find Linux systems exposed to this CVE.
ISO/IEC 27001:2022 A.8.8 — Management of technical vulnerabilities The vulnerability requires organisational handling of technical vulnerabilities and patch prioritisation.
Recommendation — Manage this kernel vulnerability through formal technical-vulnerability handling and remediation tracking.