CVE-2026-64429

System crash via sleeping IRQ-path spinlock

Published Jul 25, 2026 · Updated Jul 25, 2026

Denial of service in the Linux kernel Spreadtrum EIC driver allows local users to panic PREEMPT_RT systems during GPIO IRQ setup. sprd_eic_irq_unmask() calls sprd_eic_update(), which takes a regular spin_lock_irqsave() in the nonsleepable irq_startup() path; PREEMPT_RT turns that lock into a sleeping lock. The condition requires a PREEMPT_RT kernel using the Spreadtrum EIC driver when the affected IRQ is set up; the bounded consequence is a system crash.

CVSS severity5.5
Medium
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

Denial of service in the Linux kernel Spreadtrum EIC driver allows local users to panic PREEMPT_RT systems during GPIO IRQ setup. sprd_eic_irq_unmask() calls sprd_eic_update(), which takes a regular spin_lock_irqsave() in the nonsleepable irq_startup() path; PREEMPT_RT turns that lock into a sleeping lock. The condition requires a PREEMPT_RT kernel using the Spreadtrum EIC driver when the affected IRQ is set up; the bounded consequence is a system crash.

The record

CVE
CVE-2026-64429
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-663, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=25518e024e3a6e5715d672f1daa91e1d100f7436 <19d63fd528719ce7d06d9aeb88d25b7d6478198a
  2. Affected versionversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <4750909a40da9016185e0ac991510a278cecb1e7
  3. Affected versionversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <581ac2ad001ff1128931191f249a7f2074672b7a
  4. Affected versionversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e
  5. Affected versionversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <6112fba4150039ccd90e29f2d1b788c73ad7b3dd
  6. Affected versionversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <90f0109019e6817eb40a486671b7722d1544ae29
  7. Affected versionversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <96612bf2712cd961dbd9b52f3a9b4ab668f57628
  8. Affected versionversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <e244cd8b51001ba480f274c44dba9002813a4739
  9. Affected versionversion=4.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=25518e024e3a6e5715d672f1daa91e1d100f7436 <19d63fd528719ce7d06d9aeb88d25b7d6478198a; version=25518e024e3a6e5715d672f1daa91e1d100f7436 <4750909a40da9016185e0ac991510a278cecb1e7; version=25518e024e3a6e5715d672f1daa91e1d100f7436 <581ac2ad001ff1128931191f249a7f2074672b7a; version=25518e024e3a6e5715d672f1daa91e1d100f7436 <5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e; version=25518e024e3a6e5715d672f1daa91e1d100f7436 <6112fba4150039ccd90e29f2d1b788c73ad7b3dd; version=25518e024e3a6e5715d672f1daa91e1d100f7436 <90f0109019e6817eb40a486671b7722d1544ae29; version=25518e024e3a6e5715d672f1daa91e1d100f7436 <96612bf2712cd961dbd9b52f3a9b4ab668f57628; version=25518e024e3a6e5715d672f1daa91e1d100f7436 <e244cd8b51001ba480f274c44dba9002813a4739; version=4.17

Published CVSS scores

5.5Amazon LinuxCVSS: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

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-663Use of a Non-reentrant Function in a Concurrent Context
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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