CVE-2026-64112

Kernel crash via RBD lock-work requeue race

Published Jul 19, 2026 · Updated Jul 19, 2026

Race condition in the Linux Kernel RBD driver allows local users to crash the kernel during concurrent image unmapping. maybe_kick_acquire checks lock_dwork state and can requeue the work after cancellation, allowing rbd_acquire_lock to run after release paths free or reset device state. Triggering requires local low-privileged access and concurrent RBD lock and unmap activity; the published record identifies an assertion failure but does not demonstrate privilege escalation.

CVSS severity7.8
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux Kernel RBD driver allows local users to crash the kernel during concurrent image unmapping. maybe_kick_acquire checks lock_dwork state and can requeue the work after cancellation, allowing rbd_acquire_lock to run after release paths free or reset device state. Triggering requires local low-privileged access and concurrent RBD lock and unmap activity; the published record identifies an assertion failure but does not demonstrate privilege escalation.

The record

CVE
CVE-2026-64112
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=0 <6.12.92
  2. Affected versionversion=0 <6.18.34
  3. Affected versionversion=0 <7.0.11
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3427d7ae38337066ce88b68302e285d344ab756b
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9400efc76b42c751211974a25c91d2c19c65b01b
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9dcd4f5c99b491c37be90b0bd9988db48225fb75
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9fc75b71fdd38465c76c6f6a884cdd4ae3c72d90

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <6.12.92; version=0 <6.18.34; version=0 <7.0.11; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3427d7ae38337066ce88b68302e285d344ab756b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9400efc76b42c751211974a25c91d2c19c65b01b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9dcd4f5c99b491c37be90b0bd9988db48225fb75; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9fc75b71fdd38465c76c6f6a884cdd4ae3c72d90

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

No sourced classifications are available.

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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