CVE-2026-46250

Boot crash via restored stale MIPS pointer

Published Jun 3, 2026 · Updated Jun 3, 2026

Denial of service in affected Linux Kernel releases causes LLVM-built MIPS systems to crash during boot after relocation. In relocate_kernel(), LLVM restores the callee-saved $gp after the code assigns relocated __current_thread_info, so $gp still addresses the unrelocated kernel when init_idle runs. The failure is deterministic only for MIPS kernels built with affected LLVM 18 through 21 behavior and prevents the system from completing boot; Ubuntu reports no attacker-controllable trigger.

CVSS severity7.3
High
EPSS probability0.13%
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 affected Linux Kernel releases causes LLVM-built MIPS systems to crash during boot after relocation. In relocate_kernel(), LLVM restores the callee-saved $gp after the code assigns relocated __current_thread_info, so $gp still addresses the unrelocated kernel when init_idle runs. The failure is deterministic only for MIPS kernels built with affected LLVM 18 through 21 behavior and prevents the system from completing boot; Ubuntu reports no attacker-controllable trigger.

The record

CVE
CVE-2026-46250
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <5.10.252
  2. Affected versionversion=0 <5.15.202
  3. Affected versionversion=0 <6.1.165
  4. Affected versionversion=0 <6.12.75
  5. Affected versionversion=0 <6.18.14
  6. Affected versionversion=0 <6.19.4
  7. Affected versionversion=0 <6.6.128
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <05bff9b0ae095b2420cfebb4a96759a09334bec6
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1fe3b402b1e97a1718df3be0a1d3eee20133e735
  10. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <30bfc2d6a1132a89a5f1c3b96c59cf3e4d076ea3
  11. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4dc65b40fb80c2020efbf139b9a38d30f9a37b92
  12. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <561834f6d6f52b8a1791331e94b2aac753491d2a
  13. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9bc3b0ae5203aba650297fdf3e1e774125e423f2
  14. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c0155dee51b9f5f48aaf5c71cae005eb0e36521f
  15. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e3a6498a63394218561065a9a7a597a204f52f6a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <5.10.252; version=0 <5.15.202; version=0 <6.1.165; version=0 <6.12.75; version=0 <6.18.14; version=0 <6.19.4; version=0 <6.6.128; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <05bff9b0ae095b2420cfebb4a96759a09334bec6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1fe3b402b1e97a1718df3be0a1d3eee20133e735; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <30bfc2d6a1132a89a5f1c3b96c59cf3e4d076ea3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4dc65b40fb80c2020efbf139b9a38d30f9a37b92; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <561834f6d6f52b8a1791331e94b2aac753491d2a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9bc3b0ae5203aba650297fdf3e1e774125e423f2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c0155dee51b9f5f48aaf5c71cae005eb0e36521f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e3a6498a63394218561065a9a7a597a204f52f6a

Published CVSS scores

7.3GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
7.3UbuntuCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/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.

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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
Privilegesunauthenticated
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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