CVE-2026-45854

Kernel panic via unsupported algorithm unregistration

Published May 27, 2026 · Updated May 27, 2026

Denial of service in Linux Kernel 6.15 through 6.18.13 and 6.19 through 6.19.3 allows local users to panic affected systems. The eip93_crypto_remove path passes every algorithm entry to crypto_unregister_* even when the EIP93 options register prevented that algorithm from being registered. The panic occurs only during EIP93 driver removal on hardware missing at least one algorithm; public sources do not identify the exact low-privilege trigger.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux Kernel 6.15 through 6.18.13 and 6.19 through 6.19.3 allows local users to panic affected systems. The eip93_crypto_remove path passes every algorithm entry to crypto_unregister_* even when the EIP93 options register prevented that algorithm from being registered. The panic occurs only during EIP93 driver removal on hardware missing at least one algorithm; public sources do not identify the exact low-privilege trigger.

The record

CVE
CVE-2026-45854
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.15
  2. Affected versionversion=9739f5f93b7806a684713ba42e6ed2d1df7c8100 <0ceeadc7b53a041d89d5843f6bf0ccb7c98b0b4f
  3. Affected versionversion=9739f5f93b7806a684713ba42e6ed2d1df7c8100 <243d642ff5809811208fa1707b7ab8a6ab4b1d68
  4. Affected versionversion=9739f5f93b7806a684713ba42e6ed2d1df7c8100 <4c1c5a1d720fdacea060e106c7dd79417243d121

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.15; version=9739f5f93b7806a684713ba42e6ed2d1df7c8100 <0ceeadc7b53a041d89d5843f6bf0ccb7c98b0b4f; version=9739f5f93b7806a684713ba42e6ed2d1df7c8100 <243d642ff5809811208fa1707b7ab8a6ab4b1d68; version=9739f5f93b7806a684713ba42e6ed2d1df7c8100 <4c1c5a1d720fdacea060e106c7dd79417243d121

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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