CVE-2026-68423

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68423", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.392Z", "datePublished": "2026-08-10T12:04:43.942Z", "dateUpdated": "2026-08-17T05:05:18.750Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:05:18.750Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()\n\nmtd_concat_destroy() frees item->concat so calling\nmtd_virt_concat_put_mtd_devices(item->concat) after that leads to a\nuse-after-free.\n\nFix it by moving mtd_virt_concat_put_mtd_devices() before\nmtd_concat_destroy()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/mtd_virt_concat.c"], "versions": [{"version": "43db6366fc2de02050e66389f5628d3fdc9af10a", "lessThan": "d36520e5da8bf87265b334def0daaadf3603cc62", "status": "affected", "versionType": "git"}, {"version": "43db6366fc2de02050e66389f5628d3fdc9af10a", "lessThan": "4b45d7836b9526b8776af5f29219615be9417230", "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/mtd/mtd_virt_concat.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "7.1", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d36520e5da8bf87265b334def0daaadf3603cc62"}, {"url": "https://git.kernel.org/stable/c/4b45d7836b9526b8776af5f29219615be9417230"}], "title": "mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/mtd/mtd_virt_concat.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d36520e5da8bf87265b334def0daaadf3603cc62", "status": "affected", "version": "43db6366fc2de02050e66389f5628d3fdc9af10a", "versionType": "git"}, {"lessThan": "4b45d7836b9526b8776af5f29219615be9417230", "status": "affected", "version": "43db6366fc2de02050e66389f5628d3fdc9af10a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/mtd/mtd_virt_concat.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()\n\nmtd_concat_destroy() frees item->concat so calling\nmtd_virt_concat_put_mtd_devices(item->concat) after that leads to a\nuse-after-free.\n\nFix it by moving mtd_virt_concat_put_mtd_devices() before\nmtd_concat_destroy()."}], "id": "CVE-2026-68423", "lastModified": "2026-08-17T06:17:51.320", "metrics": {}, "published": "2026-08-10T13:20:36.200", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b45d7836b9526b8776af5f29219615be9417230"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d36520e5da8bf87265b334def0daaadf3603cc62"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Use-after-free in mtd_virt_concat_destroy()", "id": "2513229", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513229"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy()\nmtd_concat_destroy() frees item->concat so calling\nmtd_virt_concat_put_mtd_devices(item->concat) after that leads to a\nuse-after-free.\nFix it by moving mtd_virt_concat_put_mtd_devices() before\nmtd_concat_destroy().", "A flaw was found in the Linux kernel's `mtd: virt_concat` subsystem. The `mtd_virt_concat_destroy()` function incorrectly calls `mtd_virt_concat_put_mtd_devices()` after `mtd_concat_destroy()` has already freed the associated memory. This use-after-free vulnerability can lead to system instability or potentially enable a local attacker to achieve privilege escalation or arbitrary code execution."], "name": "CVE-2026-68423", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-10T12:04:43Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68423\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68423\nhttps://git.kernel.org/stable/c/4b45d7836b9526b8776af5f29219615be9417230\nhttps://git.kernel.org/stable/c/d36520e5da8bf87265b334def0daaadf3603cc62"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[43db6366fc2de02050e66389f5628d3fdc9af10a,d36520e5da8bf87265b334def0daaadf3603cc62)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[43db6366fc2de02050e66389f5628d3fdc9af10a,4b45d7836b9526b8776af5f29219615be9417230)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T16:00:04.015760+00:00", "updated": "2026-08-13T03:15:12.152041+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}