media: nxp: imx8-isi: Fix use-after-free on remove

Summary

CVECVE-2026-64421
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:26 UTC
Updated2026-07-25 10:17:26 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.064570000 (date 2026-07-28)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cf21f328fcafacf4f96e7a30ef9dceede1076378 d22fb719654bfde6f682c9f14629f5f9534175b7 git Not specified
CNA Linux Linux affected cf21f328fcafacf4f96e7a30ef9dceede1076378 ba2aa5d325270cd965c44458c5ff5ab555e6af51 git Not specified
CNA Linux Linux affected cf21f328fcafacf4f96e7a30ef9dceede1076378 ef382a6baf0a95cf199fdf6bba2fd08e58b0a249 git Not specified
CNA Linux Linux affected cf21f328fcafacf4f96e7a30ef9dceede1076378 c12a5b2261351cd3b03921ce4720332ff5184b50 git Not specified
CNA Linux Linux affected cf21f328fcafacf4f96e7a30ef9dceede1076378 b670bf89824ede5d07d20bb9bfbafb754846081d git Not specified
CNA Linux Linux affected 6.4 Not specified
CNA Linux Linux unaffected 6.4 semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ef382a6baf0a95cf199fdf6bba2fd08e58b0a249 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d22fb719654bfde6f682c9f14629f5f9534175b7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c12a5b2261351cd3b03921ce4720332ff5184b50 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b670bf89824ede5d07d20bb9bfbafb754846081d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ba2aa5d325270cd965c44458c5ff5ab555e6af51 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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