{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89870", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.771Z", "datePublished": "2026-09-16T10:31:39.271Z", "dateUpdated": "2026-10-19T08:54:03.391Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:54:03.391Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: zoran: Avoid freeing a registered video_device twice\n\nzoran_init_video_device() installs zoran_vdev_release() as the\nvideo_device release callback through zoran_template. After\nvideo_register_device() succeeds, video_unregister_device() drops the\nregistered video_device reference and the V4L2 core eventually invokes\nthat release callback, which kfree()s the video_device.\n\nzoran_exit_video_devices() called video_unregister_device() and then\nkfree(zr->video_dev), so device teardown could free the same\nvideo_device twice.\n\nRemove the direct kfree() and clear the cached pointer after\nunregistering. The pre-registration failure path keeps its manual free\nbecause the video_device was not registered there.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The double-free is in zoran_exit_video_devices() on the ZR36057/36067 PCI MJPEG capture driver's zoran_remove() path (rmmod zr36067, PCI sysfs unbind, or hot-remove). It is reached from local driver teardown, not from network packets or a remote protocol.\nAC:L - After a successful probe, zoran_remove() always calls video_unregister_device() then kfree(zr->video_dev). With no open fds, v4l2_device_release() already kfree's via zoran_vdev_release, so the second kfree is a deterministic double-free. With an fd held, the extra kfree is a deterministic UAF. No attacker-uncontrollable race or layout is required.\nPR:L - v4l2_open() has no capable() check; udev typically grants /dev/video* to the video group or seated uaccess user on capture/surveillance hosts (e.g. AverMedia 6 Eyes). Per CNA driver-removal UAF precedent, an unprivileged local user can hold the node and spray the freed video_device while teardown proceeds; init-namespace root is not required.\nUI:N - No victim action such as mounting a filesystem is required; the attacker opens /dev/video themselves and coordinates with driver removal (unbind/rmmod/maintenance). CNA driver-removal UAFs score UI:N.\nS:U - The double-free/UAF corrupts the host kernel slab object struct video_device. Any privilege escalation remains in the same kernel; this is not a VM/IOMMU boundary bypass.\nC:H - Double-free/UAF of struct video_device lets an attacker reclaim the slab object and read leftover kernel pointers/object state via subsequent ioctl/mmap on a still-open /dev/video fd, so confidentiality is High.\nI:H - struct video_device embeds fops, ioctl_ops, and a release callback; reclaiming the freed object enables function-pointer overwrite and control-flow hijacking, so integrity is High.\nA:H - A kernel double-free of video_device causes an oops/panic on the second kfree or on use of the dangling device, so availability is High." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/pci/zoran/zoran_card.c" ], "versions": [ { "version": "82e3a496eb56da0b9f29fdc5b63cedb3289e91de", "lessThan": "3ad6cf27505017a6794f5f96c31218c2291e951b", "status": "affected", "versionType": "git" }, { "version": "82e3a496eb56da0b9f29fdc5b63cedb3289e91de", "lessThan": "c4acac8cdc005b2d14b6cef5e215d264212857f3", "status": "affected", "versionType": "git" }, { "version": "82e3a496eb56da0b9f29fdc5b63cedb3289e91de", "lessThan": "4d99d8d0d895489064783601a516bd45812fa992", "status": "affected", "versionType": "git" }, { "version": "82e3a496eb56da0b9f29fdc5b63cedb3289e91de", "lessThan": "f1c4f3885df1f09bcab5296d86834d104f865e86", "status": "affected", "versionType": "git" }, { "version": "82e3a496eb56da0b9f29fdc5b63cedb3289e91de", "lessThan": "672dbccf4351370dad002d3c78dbb29ca1588f22", "status": "affected", "versionType": "git" }, { "version": "82e3a496eb56da0b9f29fdc5b63cedb3289e91de", "lessThan": "0735e0b5a96761a9ce277a238e834008ad92a0a5", "status": "affected", "versionType": "git" }, { "version": "bd01629315ffd5b63da91d0bd529a77d30e55028", "status": "affected", "versionType": "git" }, { "version": "ff3357bffd9fb78f59762d8955afc7382a279079", "status": "affected", "versionType": "git" }, { "version": "c1ba65100a359fe28cfe37e09e10c99f247cbf1e", "status": "affected", "versionType": "git" }, { "version": "1e501ec38796f43e995731d1bcd4173cb1ccfce0", "status": "affected", "versionType": "git" }, { "version": "5.10.110", "lessThan": "5.11", "status": "affected", "versionType": "semver" }, { "version": "5.15.33", "lessThan": "5.16", "status": "affected", "versionType": "semver" }, { "version": "5.16.19", "lessThan": "5.17", "status": "affected", "versionType": "semver" }, { "version": "5.17.2", "lessThan": "5.18", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/pci/zoran/zoran_card.c" ], "versions": [ { "version": "5.18", "status": "affected" }, { "version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "5.18", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3ad6cf27505017a6794f5f96c31218c2291e951b" }, { "url": "https://git.kernel.org/stable/c/c4acac8cdc005b2d14b6cef5e215d264212857f3" }, { "url": "https://git.kernel.org/stable/c/4d99d8d0d895489064783601a516bd45812fa992" }, { "url": "https://git.kernel.org/stable/c/f1c4f3885df1f09bcab5296d86834d104f865e86" }, { "url": "https://git.kernel.org/stable/c/672dbccf4351370dad002d3c78dbb29ca1588f22" }, { "url": "https://git.kernel.org/stable/c/0735e0b5a96761a9ce277a238e834008ad92a0a5" } ], "title": "media: zoran: Avoid freeing a registered video_device twice", "x_generator": { "engine": "bippy-1.2.0" } } } }