CVE-2026-64421 Details
Description
In the Linux kernel, the following vulnerability has been resolved: media: nxp: imx8-isi: Fix use-after-free on remove KASAN reports a slab-use-after-free in __media_entity_remove_link() during rmmod of imx8_isi: BUG: KASAN: slab-use-after-free in __media_entity_remove_link+0x608/0x650 Read of size 2 at addr ffff0000d47cb02a by task rmmod/724 Call trace: __media_entity_remove_link+0x608/0x650 __media_entity_remove_links+0x78/0x144 __media_device_unregister_entity+0x150/0x280 media_device_unregister_entity+0x48/0x68 v4l2_device_unregister_subdev+0x158/0x300 v4l2_async_unbind_subdev_one+0x22c/0x358 v4l2_async_nf_unbind_all_subdevs+0xfc/0x1c0 v4l2_async_nf_unregister+0x5c/0x14c mxc_isi_remove+0x124/0x2a0 [imx8_isi] Allocated by task 249: __kmalloc_noprof+0x27c/0x690 mxc_isi_crossbar_init+0x22c/0x560 [imx8_isi] Freed by task 724: kfree+0x1e4/0x5b0 mxc_isi_crossbar_cleanup+0x34/0x80 [imx8_isi] mxc_isi_remove+0x11c/0x2a0 [imx8_isi] The problem is that mxc_isi_remove() calls mxc_isi_crossbar_cleanup() before mxc_isi_v4l2_cleanup(). The crossbar cleanup frees the media entity pads, but the subsequent v4l2 cleanup still tries to remove media links that reference those pads. Fix this by calling mxc_isi_v4l2_cleanup() before mxc_isi_crossbar_cleanup() to ensure all media entities are properly unregistered while the pads are still valid.
A use-after-free vulnerability has been identified in the Linux kernel's NXP i.MX8 Image Signal Interface (ISI) driver. This vulnerability occurs during the removal of the driver, specifically when the 'rmmod' command is executed. The issue arises because the 'mxc_isi_remove()' function cleans up resources in a way that leaves dangling references to freed memory, leading to a slab-use-after-free condition. This was reported by KASAN (Kernel Address Sanitizer), indicating a read of freed memory by the 'rmmod' process.
The vulnerability has been fixed in the Linux kernel. Users should upgrade to the latest version where this issue has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/b670bf89824ede5d07d20bb9bfbafb754846081d | kernel.org | Patch |
| https://git.kernel.org/stable/c/ba2aa5d325270cd965c44458c5ff5ab555e6af51 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c12a5b2261351cd3b03921ce4720332ff5184b50 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d22fb719654bfde6f682c9f14629f5f9534175b7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/ef382a6baf0a95cf199fdf6bba2fd08e58b0a249 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.4, < 6.6.145 >= 6.7, < 6.12.97 >= 6.13, < 6.18.40 >= 6.19, < 7.1.4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 4, 2026 | Initial Analysis | [email protected] |
| Aug 17, 2026 | CVE Modified | kernel.org |
| Jul 25, 2026 | New CVE Received | kernel.org |