In the Linux kernel, the following vulnerability has been resolved: power: supply: lp8727: fix use-after-free in lp8727_release_irq()… (CVE-2026-89469)
A use-after-free vulnerability in the Linux kernel's power supply driver for lp8727 was resolved. The issue occurs because the IRQ is freed after canceling delayed work, allowing a race condition where the IRQ handler can re-arm work on freed memory. The fix involves freeing the IRQ first to prevent the handler from queuing work, then canceling the delayed work to ensure safe cleanup.
AI Analysis
Technical Summary
The Linux kernel's power supply driver for lp8727 contained a use-after-free vulnerability in the lp8727_release_irq() function. The threaded IRQ handler lp8727_isr_func() can re-arm delayed work after the IRQ is canceled but before the IRQ is freed, leading to potential dereference of freed memory by lp8727_delayed_func(). The fix changes the order of operations to free the IRQ first, quiescing the handler, then cancel the delayed work to drain any remaining tasks. This vulnerability was identified via an in-house static analysis tool.
Potential Impact
This vulnerability could lead to use-after-free conditions in kernel space, potentially causing system instability or crashes. No known exploits in the wild have been reported. The impact is limited to systems running the affected driver in the Linux kernel.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to address this vulnerability by changing the order of IRQ freeing and delayed work cancellation. Users should update to the fixed kernel version once available. No additional mitigation is required beyond applying the official fix.
In the Linux kernel, the following vulnerability has been resolved: power: supply: lp8727: fix use-after-free in lp8727_release_irq()… (CVE-2026-89469)
Description
A use-after-free vulnerability in the Linux kernel's power supply driver for lp8727 was resolved. The issue occurs because the IRQ is freed after canceling delayed work, allowing a race condition where the IRQ handler can re-arm work on freed memory. The fix involves freeing the IRQ first to prevent the handler from queuing work, then canceling the delayed work to ensure safe cleanup.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's power supply driver for lp8727 contained a use-after-free vulnerability in the lp8727_release_irq() function. The threaded IRQ handler lp8727_isr_func() can re-arm delayed work after the IRQ is canceled but before the IRQ is freed, leading to potential dereference of freed memory by lp8727_delayed_func(). The fix changes the order of operations to free the IRQ first, quiescing the handler, then cancel the delayed work to drain any remaining tasks. This vulnerability was identified via an in-house static analysis tool.
Potential Impact
This vulnerability could lead to use-after-free conditions in kernel space, potentially causing system instability or crashes. No known exploits in the wild have been reported. The impact is limited to systems running the affected driver in the Linux kernel.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to address this vulnerability by changing the order of IRQ freeing and delayed work cancellation. Users should update to the fixed kernel version once available. No additional mitigation is required beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-69w5-534x-wxxj
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-89469"]
Threat ID: 6aa4a02155bf5e2cf5a8699d
Added to database: 09/12/2026, 00:43:13 UTC
Last enriched: 09/12/2026, 01:16:03 UTC
Last updated: 09/12/2026, 02:00:59 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.