VulnerabilityPublished 2 Jul 2026Updated 3 Nov 2026

CVE-2025-40005: linux-lowlatency, linux-lowlatency-hwe-6.8 vulnerabilities

Affects Linux kernelSource GCVE Database

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Not known to be exploited · fixed in 6.8.0-134.134.1~22.04.1 : patch Linux kernel soon.

Data as of 3 Nov 2026, 17:36 UTC

Severity

High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Patch: Available – fixed in 6.8.0-134.134.1~22.04.1, 6.8.0-134.134.1

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

usn-8497-1

What to do

Upgrade the Ubuntu to 6.8.0-134.134.1~22.04.1 (linux-lowlatency-hwe-6.8 package) or 6.8.0-134.134.1 (linux-lowlatency package).

Patches and advisories

ubuntu.com/security/notices/USN-8497-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu 24.04 LTSlinux-lowlatency`pkg:deb/ubuntu/linux-lowlatency?arch=source&distro=noble`Other threats	Affected <6.8.0-134.134.1	Fixed in 6.8.0-134.134.1
Ubuntu 22.04 LTSlinux-lowlatency-hwe-6.8`pkg:deb/ubuntu/linux-lowlatency-hwe-6.8?arch=source&distro=jammy`Other threats	Affected <6.8.0-134.134.1~22.04.1	Fixed in 6.8.0-134.134.1~22.04.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A security update fixing these vulnerabilities is available and should be applied promptly. The fixed versions are linux-lowlatency and linux-lowlatency-hwe-6.8 kernels at versions 6.8.0-134.134.1~22.04.1 and 6.8.0-134.134.1. Users should update to these versions or later as provided by their distribution. No additional mitigation actions are indicated beyond applying the official patches.

Description

Multiple security vulnerabilities were discovered in the Linux kernel, including logic flaws in the XFRM ESP-in-TCP and RxRPC networking subsystems, a race condition in the ptrace subsystem, and various memory handling issues related to AppArmor notifications. These vulnerabilities could allow local attackers to escalate privileges, escape containers, cause kernel panics, resource exhaustion, information disclosure, or memory corruption. The issues affect Ubuntu Linux kernel versions 6.8, 6.17, and 7.0, among others. A security update addressing these flaws has been released.

References

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