CVE-2026-74628: In the Linux kernel, the following vulnerability vulnerability
CVE-2026-74628 affects the Linux kernel, the following vulnerability. The flaw is described as a use-after-free vulnerability.
What happened
A security weakness in the Linux kernel, the following vulnerability is being tracked as CVE-2026-74628. CVE-2026-74628 affects the Linux kernel, the following vulnerability. In the Linux kernel, the following vulnerability has been resolved: net/x25: fix use-after-free of the socket by its timers The x25 timers are armed with mod_timer() and cancelled with timer_delete(), so a pending timer holds no reference on the socket and a cancel does not wait for a callback already running on another CPU.
CVE-2026-74628 currently carries a CRITICAL 9 8 severity signal in the retained vulnerability data. A use-after-free flaw is a memory-safety problem in which software continues using memory after it has already been released. The flaw is described as a use-after-free vulnerability.
If an attacker can influence what happens in that memory area next, the bug can corrupt the application and sometimes be turned into code execution.
Editorial note: this News Brief follows the available evidence and adds length only when additional facts or useful context are available. Where public reporting does not establish a specific victim sequence, CyberDeltaForce does not present one as fact.
What the reporting and advisory establish
In the Linux kernel, the following vulnerability has been resolved: net/x25: fix use-after-free of the socket by its timers The x25 timers are armed with mod_timer() and cancelled with timer_delete(), so a pending timer holds no reference on the socket and a cancel does not wait for a callback already running on another CPU.
x25_heartbeat_expiry() also rearms unconditionally, so it can reinstall sk->sk_timer after __
CVE-2026-74628 currently carries a CRITICAL 9.8 severity signal in the retained vulnerability data.
A security weakness in the Linux kernel, the following vulnerability is being tracked as CVE-2026-74628. The flaw is described as a use-after-free vulnerability. A use-after-free flaw is a memory-safety problem in which software continues using memory after it has already been released. If an attacker can influence what happens in that memory area next, the bug can corrupt the application and sometimes be turned into code execution. x25_heartbeat_expiry() also rearms unconditionally, so it can reinstall sk->sk_timer after __. The issue currently carries a CRITICAL 9.8 severity signal in the available reporting.
What this means for your environment
Move from the published facts to the technical path, exposure conditions and defensive decisions that matter in a real environment.
Attack & Exploitation Path
The sequence below shows how the vulnerability can be reached and what successful exploitation can produce. Each stage is labeled by evidence status.
the Linux kernel, the following vulnerability is present and the vulnerable function or code path is reachable in normal application use.
attacker-controlled input or the relevant workflow reaches the use-after-free condition described in the advisory.
the use-after-free condition is triggered inside the Linux kernel, the following vulnerability, creating the security boundary failure described by the advisory.
successful exploitation reaches the confidentiality, integrity or availability impact described in the vendor or vulnerability record.
Why this matters to you
CVE-2026-74628 matters because the practical risk is not the score alone — it is whether the Linux kernel, the following vulnerability exists in your environment and whether the reported trigger or exposure path can reach it. The current severity is CRITICAL 9.8. No exploitation flag is currently present in the CDF data, but that does not remove the need to validate affected systems.
Does this deserve attention in my environment?
Check the conditions below against your use of the Linux kernel, the following vulnerability.
Select the conditions that are true in your environment. Leaving a condition unselected does not mean you are safe — it only means you have not marked it as applicable.
- Search endpoint, software and asset inventory for the Linux kernel, the following vulnerability.
- Confirm the vendor-recommended fixed version or mitigation and verify deployment, not just assignment, across affected assets.
- Review relevant endpoint, application, network or identity telemetry for activity associated with exploitation of the affected component.
- Track vendor and government guidance for any change in exploitation status while remediation is underway.
What remains unconfirmed
- Available reporting does not currently indicate exploitation, but that can change as vendor, government or threat-intelligence reporting develops.
Sources & References
Original reporting and technical references are kept here for readers who want to verify the facts. Publisher names stay out of the reading flow above.