VulnerabilityPublished 11 Sep 2026Updated 21 Oct 2026

CVE-2026-89451: Linux kernel · iommu/sva: Set handle->dev before the SVA handle is visible

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in c4c71368bc5c5b3840590d39b4cfa12d733cadf4 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in c4c71368bc5c5b3840590d39b4cfa12d733cadf4, bcffb1c75da8fc9d51168ff9f09d471c26507912, 968e9a1f71140c86dc4092f6b361e997923f3813 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Sep 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < c4c71368bc5c5b3840590d39b4cfa12d733cadf4	Fixed in c4c71368bc5c5b3840590d39b4cfa12d733cadf4
LinuxLinux	Affected ≥ be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < bcffb1c75da8fc9d51168ff9f09d471c26507912	Fixed in bcffb1c75da8fc9d51168ff9f09d471c26507912
LinuxLinux	Affected ≥ be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < 968e9a1f71140c86dc4092f6b361e997923f3813	Fixed in 968e9a1f71140c86dc4092f6b361e997923f3813
LinuxLinux	Affected ≥ be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < 530f8f9c3546cb3ebee1b135375aaee08a073ebb	Fixed in 530f8f9c3546cb3ebee1b135375aaee08a073ebb
LinuxLinux	Affected ≥ be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < 37a96a30617a4c96f048a5874c00509bc4fe4d85	Fixed in 37a96a30617a4c96f048a5874c00509bc4fe4d85
LinuxLinux	Affected =6.2	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/sva: Set handle->dev before the SVA handle is visible iommu_attach_device_pasid() installs the new SVA attach handle in the group PASID lookup before iommu_sva_bind_device() returns. A concurrent bind can therefore find and reuse the same handle after iommu_sva_lock is dropped. handle->dev was initialized after dropping iommu_sva_lock. This leaves a window where a racing bind can return a handle whose dev pointer is still NULL. A subsequent iommu_sva_unbind_device() can then dereference it via handle->dev->iommu_group. Initialize handle->dev before releasing iommu_sva_lock so any visible SVA handle is fully initialized.

References

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