In the Linux kernel, the following vulnerability has been resolved: nouveau/gem: reserve the bo in the info ioctl around the vma lookup In the… (CVE-2026-89553)
A use-after-free vulnerability in the Linux kernel's nouveau driver GEM info ioctl was resolved. The flaw involved a race condition between the info lookup finding the virtual memory area (vma) and the gem close path closing the vma, potentially leading to use-after-free. This issue was identified with the help of Opus 4.6.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's nouveau driver GEM info ioctl arises from a race condition in the non-uvmm path. Specifically, there is a timing window between the info ioctl's lookup of the virtual memory area (vma) and the gem close path closing that vma, which can lead to a use-after-free condition. The fix involved reserving the buffer object (bo) in the info ioctl around the vma lookup to prevent this race. This vulnerability has been resolved in the Linux kernel.
Potential Impact
The vulnerability could lead to a use-after-free condition in the nouveau driver, which may cause system instability or potential memory corruption. No information is provided about active exploitation in the wild or further impact details.
Mitigation Recommendations
A fix has been applied to the Linux kernel to reserve the buffer object in the info ioctl around the vma lookup, eliminating the race condition. Users should update to the fixed Linux kernel version containing this patch. No additional mitigation actions are indicated.
In the Linux kernel, the following vulnerability has been resolved: nouveau/gem: reserve the bo in the info ioctl around the vma lookup In the… (CVE-2026-89553)
Description
A use-after-free vulnerability in the Linux kernel's nouveau driver GEM info ioctl was resolved. The flaw involved a race condition between the info lookup finding the virtual memory area (vma) and the gem close path closing the vma, potentially leading to use-after-free. This issue was identified with the help of Opus 4.6.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's nouveau driver GEM info ioctl arises from a race condition in the non-uvmm path. Specifically, there is a timing window between the info ioctl's lookup of the virtual memory area (vma) and the gem close path closing that vma, which can lead to a use-after-free condition. The fix involved reserving the buffer object (bo) in the info ioctl around the vma lookup to prevent this race. This vulnerability has been resolved in the Linux kernel.
Potential Impact
The vulnerability could lead to a use-after-free condition in the nouveau driver, which may cause system instability or potential memory corruption. No information is provided about active exploitation in the wild or further impact details.
Mitigation Recommendations
A fix has been applied to the Linux kernel to reserve the buffer object in the info ioctl around the vma lookup, eliminating the race condition. Users should update to the fixed Linux kernel version containing this patch. No additional mitigation actions are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9qfh-2fg7-437p
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-89553"]
Threat ID: 6aa4a00f55bf5e2cf5a866a7
Added to database: 09/12/2026, 00:42:55 UTC
Last enriched: 09/12/2026, 01:06:25 UTC
Last updated: 09/12/2026, 01:06:25 UTC
Views: 2
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