CVE-2025-39711 - Vulnerability Details

Link	Providers
https://git.kernel.org/stable/c/0c92c49fc688cfadacc47ae99b06a31237702e9e
https://git.kernel.org/stable/c/1dfe73394dcfc9b049c8da0dc181c45f156a5f49
https://git.kernel.org/stable/c/3c0e4cc4f55f9a1db2a761e4ffb27c9594245888
https://git.kernel.org/stable/c/639f5b33fcd7c59157f29b09f6f2866eacf9279c

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: media: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls Both the ACE and CSI driver are missing a mei_cldev_disable() call in their remove() function. This causes the mei_cl client to stay part of the mei_device->file_list list even though its memory is freed by mei_cl_bus_dev_release() calling kfree(cldev->cl). This leads to a use-after-free when mei_vsc_remove() runs mei_stop() which first removes all mei bus devices calling mei_ace_remove() and mei_csi_remove() followed by mei_cl_bus_dev_release() and then calls mei_cl_all_disconnect() which walks over mei_device->file_list dereferecing the just freed cldev->cl. And mei_vsc_remove() it self is run at shutdown because of the platform_device_unregister(tp->pdev) in vsc_tp_shutdown() When building a kernel with KASAN this leads to the following KASAN report: [ 106.634504] ================================================================== [ 106.634623] BUG: KASAN: slab-use-after-free in mei_cl_set_disconnected (drivers/misc/mei/client.c:783) mei [ 106.634683] Read of size 4 at addr ffff88819cb62018 by task systemd-shutdow/1 [ 106.634729] [ 106.634767] Tainted: [E]=UNSIGNED_MODULE [ 106.634770] Hardware name: Dell Inc. XPS 16 9640/09CK4V, BIOS 1.12.0 02/10/2025 [ 106.634773] Call Trace: [ 106.634777] <TASK> ... [ 106.634871] kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:636) [ 106.634901] mei_cl_set_disconnected (drivers/misc/mei/client.c:783) mei [ 106.634921] mei_cl_all_disconnect (drivers/misc/mei/client.c:2165 (discriminator 4)) mei [ 106.634941] mei_reset (drivers/misc/mei/init.c:163) mei ... [ 106.635042] mei_stop (drivers/misc/mei/init.c:348) mei [ 106.635062] mei_vsc_remove (drivers/misc/mei/mei_dev.h:784 drivers/misc/mei/platform-vsc.c:393) mei_vsc [ 106.635066] platform_remove (drivers/base/platform.c:1424) Add the missing mei_cldev_disable() calls so that the mei_cl gets removed from mei_device->file_list before it is freed to fix this.
Title		media: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls
References		https://git.kernel.org/stable/c/0c92c49fc688cfadacc47ae99b06a31237702e9e https://git.kernel.org/stable/c/1dfe73394dcfc9b049c8da0dc181c45f156a5f49 https://git.kernel.org/stable/c/3c0e4cc4f55f9a1db2a761e4ffb27c9594245888 https://git.kernel.org/stable/c/639f5b33fcd7c59157f29b09f6f2866eacf9279c

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-39711", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.116Z", "datePublished": "2025-09-05T17:21:18.348Z", "dateUpdated": "2025-09-05T17:21:18.348Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-05T17:21:18.348Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls\n\nBoth the ACE and CSI driver are missing a mei_cldev_disable() call in\ntheir remove() function.\n\nThis causes the mei_cl client to stay part of the mei_device->file_list\nlist even though its memory is freed by mei_cl_bus_dev_release() calling\nkfree(cldev->cl).\n\nThis leads to a use-after-free when mei_vsc_remove() runs mei_stop()\nwhich first removes all mei bus devices calling mei_ace_remove() and\nmei_csi_remove() followed by mei_cl_bus_dev_release() and then calls\nmei_cl_all_disconnect() which walks over mei_device->file_list dereferecing\nthe just freed cldev->cl.\n\nAnd mei_vsc_remove() it self is run at shutdown because of the\nplatform_device_unregister(tp->pdev) in vsc_tp_shutdown()\n\nWhen building a kernel with KASAN this leads to the following KASAN report:\n\n[ 106.634504] ==================================================================\n[ 106.634623] BUG: KASAN: slab-use-after-free in mei_cl_set_disconnected (drivers/misc/mei/client.c:783) mei\n[ 106.634683] Read of size 4 at addr ffff88819cb62018 by task systemd-shutdow/1\n[ 106.634729]\n[ 106.634767] Tainted: [E]=UNSIGNED_MODULE\n[ 106.634770] Hardware name: Dell Inc. XPS 16 9640/09CK4V, BIOS 1.12.0 02/10/2025\n[ 106.634773] Call Trace:\n[ 106.634777] <TASK>\n...\n[ 106.634871] kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:636)\n[ 106.634901] mei_cl_set_disconnected (drivers/misc/mei/client.c:783) mei\n[ 106.634921] mei_cl_all_disconnect (drivers/misc/mei/client.c:2165 (discriminator 4)) mei\n[ 106.634941] mei_reset (drivers/misc/mei/init.c:163) mei\n...\n[ 106.635042] mei_stop (drivers/misc/mei/init.c:348) mei\n[ 106.635062] mei_vsc_remove (drivers/misc/mei/mei_dev.h:784 drivers/misc/mei/platform-vsc.c:393) mei_vsc\n[ 106.635066] platform_remove (drivers/base/platform.c:1424)\n\nAdd the missing mei_cldev_disable() calls so that the mei_cl gets removed\nfrom mei_device->file_list before it is freed to fix this."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/pci/intel/ivsc/mei_ace.c", "drivers/media/pci/intel/ivsc/mei_csi.c"], "versions": [{"version": "29006e196a5661d9afc8152fa2bf8a5347ac17b4", "lessThan": "3c0e4cc4f55f9a1db2a761e4ffb27c9594245888", "status": "affected", "versionType": "git"}, {"version": "29006e196a5661d9afc8152fa2bf8a5347ac17b4", "lessThan": "639f5b33fcd7c59157f29b09f6f2866eacf9279c", "status": "affected", "versionType": "git"}, {"version": "29006e196a5661d9afc8152fa2bf8a5347ac17b4", "lessThan": "1dfe73394dcfc9b049c8da0dc181c45f156a5f49", "status": "affected", "versionType": "git"}, {"version": "29006e196a5661d9afc8152fa2bf8a5347ac17b4", "lessThan": "0c92c49fc688cfadacc47ae99b06a31237702e9e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/pci/intel/ivsc/mei_ace.c", "drivers/media/pci/intel/ivsc/mei_csi.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.103", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.44", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.4", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.16.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.17-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3c0e4cc4f55f9a1db2a761e4ffb27c9594245888"}, {"url": "https://git.kernel.org/stable/c/639f5b33fcd7c59157f29b09f6f2866eacf9279c"}, {"url": "https://git.kernel.org/stable/c/1dfe73394dcfc9b049c8da0dc181c45f156a5f49"}, {"url": "https://git.kernel.org/stable/c/0c92c49fc688cfadacc47ae99b06a31237702e9e"}], "title": "media: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls", "x_generator": {"engine": "bippy-1.2.0"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls\n\nBoth the ACE and CSI driver are missing a mei_cldev_disable() call in\ntheir remove() function.\n\nThis causes the mei_cl client to stay part of the mei_device->file_list\nlist even though its memory is freed by mei_cl_bus_dev_release() calling\nkfree(cldev->cl).\n\nThis leads to a use-after-free when mei_vsc_remove() runs mei_stop()\nwhich first removes all mei bus devices calling mei_ace_remove() and\nmei_csi_remove() followed by mei_cl_bus_dev_release() and then calls\nmei_cl_all_disconnect() which walks over mei_device->file_list dereferecing\nthe just freed cldev->cl.\n\nAnd mei_vsc_remove() it self is run at shutdown because of the\nplatform_device_unregister(tp->pdev) in vsc_tp_shutdown()\n\nWhen building a kernel with KASAN this leads to the following KASAN report:\n\n[ 106.634504] ==================================================================\n[ 106.634623] BUG: KASAN: slab-use-after-free in mei_cl_set_disconnected (drivers/misc/mei/client.c:783) mei\n[ 106.634683] Read of size 4 at addr ffff88819cb62018 by task systemd-shutdow/1\n[ 106.634729]\n[ 106.634767] Tainted: [E]=UNSIGNED_MODULE\n[ 106.634770] Hardware name: Dell Inc. XPS 16 9640/09CK4V, BIOS 1.12.0 02/10/2025\n[ 106.634773] Call Trace:\n[ 106.634777] <TASK>\n...\n[ 106.634871] kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:636)\n[ 106.634901] mei_cl_set_disconnected (drivers/misc/mei/client.c:783) mei\n[ 106.634921] mei_cl_all_disconnect (drivers/misc/mei/client.c:2165 (discriminator 4)) mei\n[ 106.634941] mei_reset (drivers/misc/mei/init.c:163) mei\n...\n[ 106.635042] mei_stop (drivers/misc/mei/init.c:348) mei\n[ 106.635062] mei_vsc_remove (drivers/misc/mei/mei_dev.h:784 drivers/misc/mei/platform-vsc.c:393) mei_vsc\n[ 106.635066] platform_remove (drivers/base/platform.c:1424)\n\nAdd the missing mei_cldev_disable() calls so that the mei_cl gets removed\nfrom mei_device->file_list before it is freed to fix this."}], "id": "CVE-2025-39711", "lastModified": "2025-09-05T18:15:48.470", "metrics": {}, "published": "2025-09-05T18:15:48.470", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c92c49fc688cfadacc47ae99b06a31237702e9e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1dfe73394dcfc9b049c8da0dc181c45f156a5f49"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c0e4cc4f55f9a1db2a761e4ffb27c9594245888"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/639f5b33fcd7c59157f29b09f6f2866eacf9279c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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