In the Linux kernel, the following vulnerability has been resolved: i3c: renesas: Check that the transfer is valid before accessing it The Renesas… (CVE-2026-80950)
A use-after-free vulnerability in the Renesas I3C driver in the Linux kernel has been resolved. The driver uses an asynchronous model for data transfer involving a transfer structure that may be accessed after being freed if an interrupt fires late. This can lead to crashes due to accessing freed memory. The fix involves checking the validity of the transfer before accessing it in the interrupt handler and disabling interrupts to prevent repeated triggers.
AI Analysis
Technical Summary
The Renesas I3C driver in the Linux kernel prepares a transfer structure and waits for its completion asynchronously. If the completion times out, the waiting thread frees the transfer. However, if an interrupt occurs after the transfer is freed, the interrupt handler may access freed memory, causing crashes. The vulnerability is addressed by verifying the transfer's validity before access in the interrupt handler and disabling interrupts to prevent repeated triggering.
Potential Impact
Exploitation of this vulnerability can cause kernel crashes due to use-after-free memory access in the Renesas I3C driver. This may lead to denial of service conditions on affected systems. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix has been implemented that checks the validity of the transfer before accessing it in the interrupt handler and disables interrupts to prevent repeated triggers. Users should update to the patched Linux kernel version containing this fix once available. Patch status is not explicitly confirmed; check the vendor advisory for current remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: i3c: renesas: Check that the transfer is valid before accessing it The Renesas… (CVE-2026-80950)
Description
A use-after-free vulnerability in the Renesas I3C driver in the Linux kernel has been resolved. The driver uses an asynchronous model for data transfer involving a transfer structure that may be accessed after being freed if an interrupt fires late. This can lead to crashes due to accessing freed memory. The fix involves checking the validity of the transfer before accessing it in the interrupt handler and disabling interrupts to prevent repeated triggers.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Renesas I3C driver in the Linux kernel prepares a transfer structure and waits for its completion asynchronously. If the completion times out, the waiting thread frees the transfer. However, if an interrupt occurs after the transfer is freed, the interrupt handler may access freed memory, causing crashes. The vulnerability is addressed by verifying the transfer's validity before access in the interrupt handler and disabling interrupts to prevent repeated triggering.
Potential Impact
Exploitation of this vulnerability can cause kernel crashes due to use-after-free memory access in the Renesas I3C driver. This may lead to denial of service conditions on affected systems. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix has been implemented that checks the validity of the transfer before accessing it in the interrupt handler and disables interrupts to prevent repeated triggers. Users should update to the patched Linux kernel version containing this fix once available. Patch status is not explicitly confirmed; check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-74cf-jhfv-j2fx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-80950"]
Threat ID: 6aa4a02f55bf5e2cf5a86b71
Added to database: 09/12/2026, 00:43:27 UTC
Last enriched: 09/12/2026, 01:25:21 UTC
Last updated: 09/12/2026, 02:21:37 UTC
Views: 4
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