VulnerabilityPublished 18 Oct 2026

CVE-2026-98668: Linux kernel · iio: buffer: Ensure bounce buffer used for unaligned case is zeroed.

Source GCVE Database

Authoritative record:CVE-2026-98668

Not known to be exploited · fixed in b134ef820610bd873c9d59999d9824710964ce82 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in b134ef820610bd873c9d59999d9824710964ce82, b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2, b4f53cec8cc94b37601ce0bb2b272b6753beed98 +2

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-f4c5-jpx2-jvrg

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6, < b134ef820610bd873c9d59999d9824710964ce82	Fixed in b134ef820610bd873c9d59999d9824710964ce82
LinuxLinux	Affected ≥ 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6, < b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2	Fixed in b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2
LinuxLinux	Affected ≥ 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6, < b4f53cec8cc94b37601ce0bb2b272b6753beed98	Fixed in b4f53cec8cc94b37601ce0bb2b272b6753beed98
LinuxLinux	Affected ≥ 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6, < 5330036bc68d23672bfcc16c60c54701ae123083	Fixed in 5330036bc68d23672bfcc16c60c54701ae123083
LinuxLinux	Affected ≥ 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6, < 3a87212b1a09a1fdd730ce5520f7b1fc0b488511	Fixed in 3a87212b1a09a1fdd730ce5520f7b1fc0b488511
LinuxLinux	Affected =5.16	Fixed in–

AI-suggested

A fix has been applied to the Linux kernel to zero the bounce buffer in the affected function. Users should update their Linux kernel to a version that includes this fix. Since this is a kernel-level issue, applying the official kernel patch or upgrading to a fixed kernel release is the recommended remediation.

Description

A vulnerability in the Linux kernel's Industrial I/O (iio) buffer handling was resolved. The function iio_push_to_buffers_with_ts_unaligned() could leak uninitialized heap memory to userspace when data length was not a multiple of 8 bytes and timestamping was enabled. The issue was fixed by ensuring the bounce buffer is zeroed using __GFP_ZERO during memory allocation.

References

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