In the Linux kernel, the following vulnerability has been resolved: media: nxp: imx8-isi: Fix use-after-free on remove KASAN reports a… (CVE-2026-64421)
A use-after-free vulnerability in the Linux kernel's media subsystem for the nxp imx8-isi driver was fixed. The issue occurs during module removal when media entity pads are freed before all media links referencing them are removed, causing a use-after-free error detected by KASAN. The fix involves reordering cleanup calls to ensure media entities are unregistered while pads remain valid.
AI Analysis
Technical Summary
The Linux kernel vulnerability CVE-2026-64421 involves a use-after-free in the nxp imx8-isi media driver during the removal of the imx8_isi module. Specifically, mxc_isi_remove() calls mxc_isi_crossbar_cleanup() before mxc_isi_v4l2_cleanup(), leading to media entity pads being freed prematurely. Subsequent cleanup attempts to remove media links referencing these freed pads, causing a use-after-free detected by KASAN. The fix changes the order of cleanup calls to call mxc_isi_v4l2_cleanup() before mxc_isi_crossbar_cleanup(), preventing the use-after-free condition.
Potential Impact
This vulnerability can cause kernel memory corruption due to use-after-free, potentially leading to system instability or crashes during module removal. There is no indication of remote exploitability or privilege escalation from the provided data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by reordering cleanup calls in the nxp imx8-isi driver to prevent use-after-free. Users should update to a kernel version that includes this fix. Patch status is not explicitly stated; check the vendor or Linux kernel advisory for the exact fixed version and apply the official update accordingly.
In the Linux kernel, the following vulnerability has been resolved: media: nxp: imx8-isi: Fix use-after-free on remove KASAN reports a… (CVE-2026-64421)
Description
A use-after-free vulnerability in the Linux kernel's media subsystem for the nxp imx8-isi driver was fixed. The issue occurs during module removal when media entity pads are freed before all media links referencing them are removed, causing a use-after-free error detected by KASAN. The fix involves reordering cleanup calls to ensure media entities are unregistered while pads remain valid.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel vulnerability CVE-2026-64421 involves a use-after-free in the nxp imx8-isi media driver during the removal of the imx8_isi module. Specifically, mxc_isi_remove() calls mxc_isi_crossbar_cleanup() before mxc_isi_v4l2_cleanup(), leading to media entity pads being freed prematurely. Subsequent cleanup attempts to remove media links referencing these freed pads, causing a use-after-free detected by KASAN. The fix changes the order of cleanup calls to call mxc_isi_v4l2_cleanup() before mxc_isi_crossbar_cleanup(), preventing the use-after-free condition.
Potential Impact
This vulnerability can cause kernel memory corruption due to use-after-free, potentially leading to system instability or crashes during module removal. There is no indication of remote exploitability or privilege escalation from the provided data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by reordering cleanup calls in the nxp imx8-isi driver to prevent use-after-free. Users should update to a kernel version that includes this fix. Patch status is not explicitly stated; check the vendor or Linux kernel advisory for the exact fixed version and apply the official update accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jj8q-g7xc-jx6p
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64421"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a6542099c2644c7f80835c5
Added to database: 07/25/2026, 23:08:57 UTC
Last enriched: 07/25/2026, 23:23:22 UTC
Last updated: 07/26/2026, 05:08:06 UTC
Views: 5
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