CVE-2026-68345

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68345", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.384Z", "datePublished": "2026-08-10T12:03:22.098Z", "dateUpdated": "2026-08-17T05:03:45.634Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:03:45.634Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm_mpam: guard MBWU state before adding it to garbage\n\n__destroy_component_cfg() adds each RIS mbwu_state object to the MPAM\ngarbage list when destroying component configuration.\n\nHowever, mbwu_state is allocated per RIS and only for RISes with MBWU\nmonitors. A component can therefore have comp->cfg allocated while some\nRISes still have ris->mbwu_state set to NULL.\n\nPassing a NULL mbwu_state to add_to_garbage() dereferences the NULL\npointer inside the macro.\n\nSkip RISes that do not have an mbwu_state object before adding them to\nthe garbage list."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/resctrl/mpam_devices.c"], "versions": [{"version": "41e8a14950e1732af51cfec8fa09f8ded02a5ca9", "lessThan": "ca1f96334267ab8d47b2c9d535cdc9920fdde269", "status": "affected", "versionType": "git"}, {"version": "41e8a14950e1732af51cfec8fa09f8ded02a5ca9", "lessThan": "977f52909c624210178a1247fab0b02b110c1106", "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/resctrl/mpam_devices.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "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": "6.19", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ca1f96334267ab8d47b2c9d535cdc9920fdde269"}, {"url": "https://git.kernel.org/stable/c/977f52909c624210178a1247fab0b02b110c1106"}], "title": "arm_mpam: guard MBWU state before adding it to garbage", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/resctrl/mpam_devices.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ca1f96334267ab8d47b2c9d535cdc9920fdde269", "status": "affected", "version": "41e8a14950e1732af51cfec8fa09f8ded02a5ca9", "versionType": "git"}, {"lessThan": "977f52909c624210178a1247fab0b02b110c1106", "status": "affected", "version": "41e8a14950e1732af51cfec8fa09f8ded02a5ca9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/resctrl/mpam_devices.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "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\narm_mpam: guard MBWU state before adding it to garbage\n\n__destroy_component_cfg() adds each RIS mbwu_state object to the MPAM\ngarbage list when destroying component configuration.\n\nHowever, mbwu_state is allocated per RIS and only for RISes with MBWU\nmonitors. A component can therefore have comp->cfg allocated while some\nRISes still have ris->mbwu_state set to NULL.\n\nPassing a NULL mbwu_state to add_to_garbage() dereferences the NULL\npointer inside the macro.\n\nSkip RISes that do not have an mbwu_state object before adding them to\nthe garbage list."}], "id": "CVE-2026-68345", "lastModified": "2026-08-17T06:17:42.740", "metrics": {}, "published": "2026-08-10T13:20:25.093", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/977f52909c624210178a1247fab0b02b110c1106"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca1f96334267ab8d47b2c9d535cdc9920fdde269"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Null pointer dereference in arm_mpam component", "id": "2513302", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513302"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\narm_mpam: guard MBWU state before adding it to garbage\n__destroy_component_cfg() adds each RIS mbwu_state object to the MPAM\ngarbage list when destroying component configuration.\nHowever, mbwu_state is allocated per RIS and only for RISes with MBWU\nmonitors. A component can therefore have comp->cfg allocated while some\nRISes still have ris->mbwu_state set to NULL.\nPassing a NULL mbwu_state to add_to_garbage() dereferences the NULL\npointer inside the macro.\nSkip RISes that do not have an mbwu_state object before adding them to\nthe garbage list.", "A flaw was found in the Linux kernel's arm_mpam component. When destroying component configuration, the `__destroy_component_cfg()` function attempts to add `mbwu_state` objects to a garbage list. However, some Root Interrupt Systems (RISes) may have a NULL `mbwu_state` object, leading to a null pointer dereference when passed to `add_to_garbage()`. This vulnerability could allow a local attacker to cause a denial of service (DoS)."], "name": "CVE-2026-68345", "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": "2026-08-10T12:03:22Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68345\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68345\nhttps://git.kernel.org/stable/c/977f52909c624210178a1247fab0b02b110c1106\nhttps://git.kernel.org/stable/c/ca1f96334267ab8d47b2c9d535cdc9920fdde269"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41e8a14950e1732af51cfec8fa09f8ded02a5ca9,ca1f96334267ab8d47b2c9d535cdc9920fdde269)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41e8a14950e1732af51cfec8fa09f8ded02a5ca9,977f52909c624210178a1247fab0b02b110c1106)"}}], "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": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc5,*]"}}], "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": "2026-08-10T15:45:03.652483+00:00", "updated": "2026-08-13T04:45:02.889787+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}