VulnerabilityPublished 4 Sep 2026Updated 3 Oct 2026

CVE-2026-80834: Linux kernel · crypto: sun8i-ce – Remove crypto_rng interface

Affects Linux kernelSource GCVE Database

Not known to be exploited.

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 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 4 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.

ghsa-4mjx-2pg4-x29v

What to do

Affected software

Product	Affected	Fixed in
Ubuntu 26.04 LTSlinux`pkg:deb/ubuntu/linux?arch=source&distro=resolute`Other threats	Affected 6.17.0-5.5 – 7.0.0-34.34 22 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-aws`pkg:deb/ubuntu/linux-aws?arch=source&distro=resolute`Other threats	Affected 6.17.0-1002.2 – 7.0.0-1013.13 14 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-azure`pkg:deb/ubuntu/linux-azure?arch=source&distro=resolute`Other threats	Affected 6.17.0-1003.3 – 7.0.0-1014.14 14 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-azure-fde`pkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resolute`Other threats	Affected 7.0.0-1003.3 – 7.0.0-1013.13 8 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-gcp`pkg:deb/ubuntu/linux-gcp?arch=source&distro=resolute`Other threats	Affected 6.17.0-1002.2 – 7.0.0-1013.13 12 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-gke`pkg:deb/ubuntu/linux-gke?arch=source&distro=resolute`Other threats	Affected 7.0.0-1002.3 – 7.0.0-1007.8 5 affected builds	Fixed in–

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

AI-suggested

The vulnerability has been resolved by removing the vulnerable crypto_rng interface code for sun8i-ce. Users should update to a Linux kernel version that includes this fix. Since the vulnerable code is removed rather than patched, no additional mitigation is required beyond applying the updated kernel.

Description

A use-after-free vulnerability was found and resolved in the Linux kernel's sun8i-ce crypto_rng interface. This interface, which provided hardware PRNG functionality, was redundant and unused, so it has been removed. The vulnerability involved improper handling of DMA shutdown when a signal interrupted wait_for_completion_interruptible_timeout(), leading to a use-after-free condition. The sun8i-ce support for the actual hardware RNG interface remains unaffected. The fix removes the vulnerable crypto_rng code rather than patching it separately.

Impact

The vulnerability could lead to a use-after-free condition in the kernel's crypto_rng driver for sun8i-ce hardware, potentially causing kernel instability or crashes. However, since the crypto_rng interface was unused and redundant, the practical impact is limited. The actual hardware RNG interface remains functional and unaffected.

Summary

The Linux kernel contained a use-after-free vulnerability in the sun8i-ce crypto_rng interface's ->generate() function. This was due to the function using wait_for_completion_interruptible_timeout() without properly handling the shutdown of the DMA operation if interrupted by a signal. Because the crypto_rng interface was redundant and largely unused, the maintainers removed the sun8i-ce crypto_rng support entirely, leaving the sun8i-ce hardware RNG interface intact. This removal resolves the vulnerability. The fix is marked with Fixes and Cc stable tags, indicating it is included in stable kernel updates.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Oct 2026, 03:59 UTC

Technical details

References

Community reviews

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