CVE-2026-64421 (GCVE-0-2026-64421)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
Title
media: nxp: imx8-isi: Fix use-after-free on remove
Summary
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.
Severity
No CVSS data available.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: cf21f328fcafacf4f96e7a30ef9dceede1076378 , < d22fb719654bfde6f682c9f14629f5f9534175b7 (git)
Affected: cf21f328fcafacf4f96e7a30ef9dceede1076378 , < ba2aa5d325270cd965c44458c5ff5ab555e6af51 (git)
Affected: cf21f328fcafacf4f96e7a30ef9dceede1076378 , < ef382a6baf0a95cf199fdf6bba2fd08e58b0a249 (git)
Affected: cf21f328fcafacf4f96e7a30ef9dceede1076378 , < c12a5b2261351cd3b03921ce4720332ff5184b50 (git)
Affected: cf21f328fcafacf4f96e7a30ef9dceede1076378 , < b670bf89824ede5d07d20bb9bfbafb754846081d (git)
Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c"
          ],
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          "versions": [
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              "versionType": "git"
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          "product": "Linux",
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            "drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.4"
            },
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.4",
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                  "vulnerable": true
                },
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                  "vulnerable": true
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                {
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: nxp: imx8-isi: Fix use-after-free on remove\n\nKASAN reports a slab-use-after-free in __media_entity_remove_link()\nduring rmmod of imx8_isi:\n\n  BUG: KASAN: slab-use-after-free in __media_entity_remove_link+0x608/0x650\n  Read of size 2 at addr ffff0000d47cb02a by task rmmod/724\n\n  Call trace:\n   __media_entity_remove_link+0x608/0x650\n   __media_entity_remove_links+0x78/0x144\n   __media_device_unregister_entity+0x150/0x280\n   media_device_unregister_entity+0x48/0x68\n   v4l2_device_unregister_subdev+0x158/0x300\n   v4l2_async_unbind_subdev_one+0x22c/0x358\n   v4l2_async_nf_unbind_all_subdevs+0xfc/0x1c0\n   v4l2_async_nf_unregister+0x5c/0x14c\n   mxc_isi_remove+0x124/0x2a0 [imx8_isi]\n\n  Allocated by task 249:\n   __kmalloc_noprof+0x27c/0x690\n   mxc_isi_crossbar_init+0x22c/0x560 [imx8_isi]\n\n  Freed by task 724:\n   kfree+0x1e4/0x5b0\n   mxc_isi_crossbar_cleanup+0x34/0x80 [imx8_isi]\n   mxc_isi_remove+0x11c/0x2a0 [imx8_isi]\n\nThe problem is that mxc_isi_remove() calls mxc_isi_crossbar_cleanup()\nbefore mxc_isi_v4l2_cleanup(). The crossbar cleanup frees the media\nentity pads, but the subsequent v4l2 cleanup still tries to remove\nmedia links that reference those pads.\n\nFix this by calling mxc_isi_v4l2_cleanup() before\nmxc_isi_crossbar_cleanup() to ensure all media entities are properly\nunregistered while the pads are still valid."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:59.926Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/d22fb719654bfde6f682c9f14629f5f9534175b7"
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        },
        {
          "url": "https://git.kernel.org/stable/c/b670bf89824ede5d07d20bb9bfbafb754846081d"
        }
      ],
      "title": "media: nxp: imx8-isi: Fix use-after-free on remove",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64421",
    "datePublished": "2026-07-25T08:50:59.926Z",
    "dateReserved": "2026-07-19T15:36:31.786Z",
    "dateUpdated": "2026-07-25T08:50:59.926Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64421",
      "date": "2026-07-26",
      "epss": "0.00168",
      "percentile": "0.06407"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64421\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:26.097\",\"lastModified\":\"2026-07-25T10:17:26.097\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: nxp: imx8-isi: Fix use-after-free on remove\\n\\nKASAN reports a slab-use-after-free in __media_entity_remove_link()\\nduring rmmod of imx8_isi:\\n\\n  BUG: KASAN: slab-use-after-free in __media_entity_remove_link+0x608/0x650\\n  Read of size 2 at addr ffff0000d47cb02a by task rmmod/724\\n\\n  Call trace:\\n   __media_entity_remove_link+0x608/0x650\\n   __media_entity_remove_links+0x78/0x144\\n   __media_device_unregister_entity+0x150/0x280\\n   media_device_unregister_entity+0x48/0x68\\n   v4l2_device_unregister_subdev+0x158/0x300\\n   v4l2_async_unbind_subdev_one+0x22c/0x358\\n   v4l2_async_nf_unbind_all_subdevs+0xfc/0x1c0\\n   v4l2_async_nf_unregister+0x5c/0x14c\\n   mxc_isi_remove+0x124/0x2a0 [imx8_isi]\\n\\n  Allocated by task 249:\\n   __kmalloc_noprof+0x27c/0x690\\n   mxc_isi_crossbar_init+0x22c/0x560 [imx8_isi]\\n\\n  Freed by task 724:\\n   kfree+0x1e4/0x5b0\\n   mxc_isi_crossbar_cleanup+0x34/0x80 [imx8_isi]\\n   mxc_isi_remove+0x11c/0x2a0 [imx8_isi]\\n\\nThe problem is that mxc_isi_remove() calls mxc_isi_crossbar_cleanup()\\nbefore mxc_isi_v4l2_cleanup(). The crossbar cleanup frees the media\\nentity pads, but the subsequent v4l2 cleanup still tries to remove\\nmedia links that reference those pads.\\n\\nFix this by calling mxc_isi_v4l2_cleanup() before\\nmxc_isi_crossbar_cleanup() to ensure all media entities are properly\\nunregistered while the pads are still valid.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"cf21f328fcafacf4f96e7a30ef9dceede1076378\",\"lessThan\":\"d22fb719654bfde6f682c9f14629f5f9534175b7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf21f328fcafacf4f96e7a30ef9dceede1076378\",\"lessThan\":\"ba2aa5d325270cd965c44458c5ff5ab555e6af51\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf21f328fcafacf4f96e7a30ef9dceede1076378\",\"lessThan\":\"ef382a6baf0a95cf199fdf6bba2fd08e58b0a249\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf21f328fcafacf4f96e7a30ef9dceede1076378\",\"lessThan\":\"c12a5b2261351cd3b03921ce4720332ff5184b50\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cf21f328fcafacf4f96e7a30ef9dceede1076378\",\"lessThan\":\"b670bf89824ede5d07d20bb9bfbafb754846081d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/b670bf89824ede5d07d20bb9bfbafb754846081d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ba2aa5d325270cd965c44458c5ff5ab555e6af51\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c12a5b2261351cd3b03921ce4720332ff5184b50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d22fb719654bfde6f682c9f14629f5f9534175b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ef382a6baf0a95cf199fdf6bba2fd08e58b0a249\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:59:39Z",
      "cve": "CVE-2026-64421",
      "id": "CVE-2026-64421",
      "initial_release_date": "2026-07-25T15:59:39Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64421",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64421.json",
      "version": "2"
    }
  }
}



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