VulnerabilityPublished 3 Dec 2025Updated 3 Nov 2026

CVE-2025-40025: linux, linux-aws, linux-realtime vulnerabilities

Affects Linux kernelSource GCVE Database

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Not known to be exploited · fixed in 6.17.0-7.7 : patch Linux kernel soon.

Data as of 3 Nov 2026, 17:44 UTC

Severity

High

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

Patch: Available – fixed in 6.17.0-7.7, 6.17.0-1004.4, 6.17.0-1003.4

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Dec 2025
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-7906-1

What to do

Upgrade the Ubuntu to 6.17.0-7.7 (linux package) or 6.17.0-1004.4 (linux-aws package) or 6.17.0-1003.4 (linux-realtime package).

Patches and advisories

ubuntu.com/security/notices/USN-7906-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu 25.10linux`pkg:deb/ubuntu/linux?arch=source&distro=questing`Other threats	Affected <6.17.0-7.7	Fixed in 6.17.0-7.7
Ubuntu 25.10linux-aws`pkg:deb/ubuntu/linux-aws?arch=source&distro=questing`Other threats	Affected <6.17.0-1004.4	Fixed in 6.17.0-1004.4
Ubuntu 25.10linux-realtime`pkg:deb/ubuntu/linux-realtime?arch=source&distro=questing`Other threats	Affected <6.17.0-1003.4	Fixed in 6.17.0-1003.4

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

AI-suggested

A patch is available and should be applied by updating to Linux kernel versions 6.17.0-7.7, 6.17.0-1004.4, or 6.17.0-1003.4 as appropriate for the system. After updating, a system reboot is required to activate the fixes. Due to an ABI change, all third-party kernel modules must be recompiled and reinstalled. Follow the vendor advisory instructions at https://ubuntu.com/security/notices/USN-7906-1 for detailed update guidance.

Description

Multiple security vulnerabilities were identified in the Linux kernel affecting various subsystems including x86 architecture, Cryptographic API, Android drivers, TTY drivers, F2FS file system, and 9P file system network protocol. These flaws could potentially allow an attacker to compromise the system. The issues have been addressed in updated Linux kernel versions, and users are advised to apply these updates and reboot their systems. Due to an ABI change, recompilation and reinstallation of third-party kernel modules are required after updating.

References

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