VulnerabilityPublished 18 Oct 2026

CVE-2026-98667: Linux kernel · iio: frequency: adf4377: Fully initialize clk_init_data and clk_parent_data

Source GCVE Database

Authoritative record:CVE-2026-98667· Low

Not known to be exploited : upgrade to e787fd23d5063c61582c3c27522240b6e6703fde or 6564f394a4a95fad534643a6ca0f1d36ff081799 when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Low

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e787fd23d5063c61582c3c27522240b6e6703fde, 6564f394a4a95fad534643a6ca0f1d36ff081799

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-xcxr-v5jx-qv69

What to do

Upgrade Linux kernel to e787fd23d5063c61582c3c27522240b6e6703fde or 6564f394a4a95fad534643a6ca0f1d36ff081799.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 60e5448ddbec2dc206027a4850604d8fdf9973b7, < e787fd23d5063c61582c3c27522240b6e6703fde	Fixed in e787fd23d5063c61582c3c27522240b6e6703fde
LinuxLinux	Affected ≥ 60e5448ddbec2dc206027a4850604d8fdf9973b7, < 6564f394a4a95fad534643a6ca0f1d36ff081799	Fixed in 6564f394a4a95fad534643a6ca0f1d36ff081799
LinuxLinux	Affected =7.0	Fixed in–

AI-suggested

A fix is available that fully initializes all members of clk_init_data and clk_parent_data in the adf4377 driver. Users should apply the official Linux kernel patch that addresses this issue. Since this is a kernel-level fix, upgrading to a patched kernel version is the recommended remediation.

Description

A vulnerability in the Linux kernel's iio frequency driver (adf4377) was resolved by fully initializing the clk_init_data and clk_parent_data structures. The issue arose because some members of these structures were left uninitialized, which could cause crashes when certain kernel configuration options (CONFIG_INIT_STACK_ALL_PATTERN or CONFIG_INIT_STACK_NONE) were enabled. The fix ensures all members are properly initialized to prevent such issues.

Impact

The vulnerability could cause kernel crashes due to uninitialized data structures in the clock initialization code of the adf4377 driver. This impacts system stability under certain kernel configurations that enable stack initialization patterns. There is no indication of code execution or privilege escalation from this issue.

Summary

The Linux kernel vulnerability CVE-2026-98667 involves incomplete initialization of the clk_init_data and clk_parent_data structures in the iio frequency driver adf4377. Specifically, adf4377_clk_register() assumed parent_names was NULL without initializing it and only partially initialized parent_data.fw_name, leaving other members uninitialized. This could lead to crashes under specific kernel configurations that detect uninitialized stack variables. The patch fully initializes all members to prevent subtle bugs and future breakage when changing driver parent specification methods.

References

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