VulnerabilityPublished 23 Jul 2026Updated 27 Oct 2026

CVE-2025-21709: linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities

Affects Linux kernelSource GCVE Database

Mentioned vulnerabilities

Not known to be exploited · fixed in 6.8.0-1059.62~22.04.1 : patch Linux kernel soon.

Data as of 28 Oct 2026, 05:11 UTC

Severity

High

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.8.0-1059.62~22.04.1, 6.8.0-1059.62, 6.8.0-1059.62.1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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-8596-1

What to do

Upgrade the Ubuntu to 6.8.0-1059.62~22.04.1 (linux-nvidia-6.8 package) or 6.8.0-1059.62 (linux-nvidia package) or 6.8.0-1059.62.1 (linux-nvidia-lowlatency package).

Patches and advisories

ubuntu.com/security/notices/USN-8596-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu 24.04 LTSlinux-nvidia`pkg:deb/ubuntu/linux-nvidia?arch=source&distro=noble`Other threats	Affected <6.8.0-1059.62	Fixed in 6.8.0-1059.62
Ubuntu 24.04 LTSlinux-nvidia-lowlatency`pkg:deb/ubuntu/linux-nvidia-lowlatency?arch=source&distro=noble`Other threats	Affected <6.8.0-1059.62.1	Fixed in 6.8.0-1059.62.1
Ubuntu 22.04 LTSlinux-nvidia-6.8`pkg:deb/ubuntu/linux-nvidia-6.8?arch=source&distro=jammy`Other threats	Affected <6.8.0-1059.62~22.04.1	Fixed in 6.8.0-1059.62~22.04.1

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

AI-suggested

A patch is available and users should update to linux-nvidia kernel versions 6.8.0-1059.62~22.04.1, 6.8.0-1059.62, or 6.8.0-1059.62.1 or later. After updating, a system reboot is required to apply the fixes. Due to an ABI change, third-party kernel modules must be recompiled and reinstalled. Follow vendor guidance for updating and recompiling modules. No additional mitigation actions are indicated beyond applying the official update.

Description

Multiple security vulnerabilities affecting the Linux kernel for NVIDIA systems and related subsystems were discovered, including issues in AMD processors related to speculative execution, resource isolation, and entropy handling. These vulnerabilities could allow local attackers to expose sensitive information, escalate privileges, or influence cryptographic operations. The update addresses numerous flaws across a wide range of kernel subsystems and drivers. Fixed versions are available and users are advised to update and reboot their systems.

Impact

Local attackers could exploit these vulnerabilities to expose sensitive information, escalate privileges to higher levels, or compromise confidentiality and integrity of cryptographic operations. The broad range of affected kernel subsystems increases the risk of system compromise if unpatched. However, no known exploits in the wild have been reported at this time.

Summary

This security advisory covers multiple vulnerabilities in the Linux kernel, specifically in the linux-nvidia, linux-nvidia-6.8, and linux-nvidia-lowlatency packages. Key issues include: CVE-2025-54505, where some AMD processors fail to clear data in the floating point divider unit during speculative execution, potentially exposing sensitive information; CVE-2025-54518, involving improper isolation of shared resources in AMD Zen 2 processors' operation cache, possibly allowing privilege escalation; and CVE-2025-62626, where AMD Zen 5 processors supporting the RDSEED instruction may produce insufficiently random values, risking confidentiality and integrity. Additionally, numerous other security flaws were fixed across many kernel subsystems and drivers, including architectures (ARM64, RISC-V, x86), device drivers, filesystems, networking, and security frameworks. The vendor has released fixed versions 6.8.0-1059.62~22.04.1, 6.8.0-1059.62, and 6.8.0-1059.62.1 to address these issues.

References

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