CVE-2026-97515

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97515", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.152Z", "datePublished": "2026-09-24T16:05:13.124Z", "dateUpdated": "2026-10-21T12:53:00.686Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:53:00.686Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845\n\nOn NPCM845, when a target on the I3C bus gets stuck holding SDA low,\nthe controller reports a false Master Request (MR) in-band interrupt\nevent. The driver handles this by emitting a STOP condition to restore\nthe bus.\n\nHowever, the hardware quirk SVC_I3C_QUIRK_FALSE_SLVSTART indicates that\nemitting a STOP condition may spuriously set the SLVSTART interrupt\nstatus bit. In the Master Request case, this creates a feedback loop:\nthe STOP triggers a new SLVSTART event, the IRQ handler fires again,\nthe controller still reports an MR type, another STOP is emitted, and\nthe cycle repeats indefinitely, resulting in an IRQ storm that can lock\nup the CPU.\n\nClear the SLVSTART status bit explicitly after emitting the STOP in the\nMaster Request IBI handler when the SVC_I3C_QUIRK_FALSE_SLVSTART quirk\nis set. This breaks the feedback loop without affecting normal SLVSTART\nprocessing, which is already guarded in the top-level IRQ handler by\nchecking that MSTATUS is in SLVREQ state."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/i3c/master/svc-i3c-master.c"], "versions": [{"version": "1ea4653cff35c29d1dd0b14ad9c8245e7318f337", "lessThan": "335f72b1f9bbcf0f4cc5a505443b15f1af563b4f", "status": "affected", "versionType": "git"}, {"version": "0430bf9bc1ac068c8b8c540eb93e5751872efc51", "lessThan": "e9b139c4684ed8593a0b779ca02ea05f460b2eec", "status": "affected", "versionType": "git"}, {"version": "0430bf9bc1ac068c8b8c540eb93e5751872efc51", "lessThan": "1effa3adfe53cb2bb28bf5640a676b791d5ab405", "status": "affected", "versionType": "git"}, {"version": "30748ce7e156f221fb91689b338a0d7df77b732a", "status": "affected", "versionType": "git"}, {"version": "f2985a1de6f53abbc42c7a696ee6ba8bdecc9426", "status": "affected", "versionType": "git"}, {"version": "0541822045ae043d62c941ca31fa76871e436b5e", "status": "affected", "versionType": "git"}, {"version": "d231fb443d8d4042f0dd705b93beba8c916a7344", "status": "affected", "versionType": "git"}, {"version": "6.12.31", "lessThan": "6.12.114", "status": "affected", "versionType": "semver"}, {"version": "5.15.185", "lessThan": "5.16", "status": "affected", "versionType": "semver"}, {"version": "6.1.141", "lessThan": "6.2", "status": "affected", "versionType": "semver"}, {"version": "6.6.93", "lessThan": "6.7", "status": "affected", "versionType": "semver"}, {"version": "6.14.9", "lessThan": "6.15", "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/i3c/master/svc-i3c-master.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "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": "6.12.31", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.185"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/335f72b1f9bbcf0f4cc5a505443b15f1af563b4f"}, {"url": "https://git.kernel.org/stable/c/e9b139c4684ed8593a0b779ca02ea05f460b2eec"}, {"url": "https://git.kernel.org/stable/c/1effa3adfe53cb2bb28bf5640a676b791d5ab405"}], "title": "i3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/i3c/master/svc-i3c-master.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "335f72b1f9bbcf0f4cc5a505443b15f1af563b4f", "status": "affected", "version": "1ea4653cff35c29d1dd0b14ad9c8245e7318f337", "versionType": "git"}, {"lessThan": "e9b139c4684ed8593a0b779ca02ea05f460b2eec", "status": "affected", "version": "0430bf9bc1ac068c8b8c540eb93e5751872efc51", "versionType": "git"}, {"lessThan": "1effa3adfe53cb2bb28bf5640a676b791d5ab405", "status": "affected", "version": "0430bf9bc1ac068c8b8c540eb93e5751872efc51", "versionType": "git"}, {"status": "affected", "version": "30748ce7e156f221fb91689b338a0d7df77b732a", "versionType": "git"}, {"status": "affected", "version": "f2985a1de6f53abbc42c7a696ee6ba8bdecc9426", "versionType": "git"}, {"status": "affected", "version": "0541822045ae043d62c941ca31fa76871e436b5e", "versionType": "git"}, {"status": "affected", "version": "d231fb443d8d4042f0dd705b93beba8c916a7344", "versionType": "git"}, {"lessThan": "6.12.114", "status": "affected", "version": "6.12.31", "versionType": "semver"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.185", "versionType": "semver"}, {"lessThan": "6.2", "status": "affected", "version": "6.1.141", "versionType": "semver"}, {"lessThan": "6.7", "status": "affected", "version": "6.6.93", "versionType": "semver"}, {"lessThan": "6.15", "status": "affected", "version": "6.14.9", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/i3c/master/svc-i3c-master.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "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\ni3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845\n\nOn NPCM845, when a target on the I3C bus gets stuck holding SDA low,\nthe controller reports a false Master Request (MR) in-band interrupt\nevent. The driver handles this by emitting a STOP condition to restore\nthe bus.\n\nHowever, the hardware quirk SVC_I3C_QUIRK_FALSE_SLVSTART indicates that\nemitting a STOP condition may spuriously set the SLVSTART interrupt\nstatus bit. In the Master Request case, this creates a feedback loop:\nthe STOP triggers a new SLVSTART event, the IRQ handler fires again,\nthe controller still reports an MR type, another STOP is emitted, and\nthe cycle repeats indefinitely, resulting in an IRQ storm that can lock\nup the CPU.\n\nClear the SLVSTART status bit explicitly after emitting the STOP in the\nMaster Request IBI handler when the SVC_I3C_QUIRK_FALSE_SLVSTART quirk\nis set. This breaks the feedback loop without affecting normal SLVSTART\nprocessing, which is already guarded in the top-level IRQ handler by\nchecking that MSTATUS is in SLVREQ state."}], "id": "CVE-2026-97515", "lastModified": "2026-10-21T13:21:11.650", "metrics": {}, "published": "2026-09-24T17:17:29.440", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1effa3adfe53cb2bb28bf5640a676b791d5ab405"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/335f72b1f9bbcf0f4cc5a505443b15f1af563b4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e9b139c4684ed8593a0b779ca02ea05f460b2eec"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: i3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845", "id": "2540431", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540431"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-835", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ni3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845\nOn NPCM845, when a target on the I3C bus gets stuck holding SDA low,\nthe controller reports a false Master Request (MR) in-band interrupt\nevent. The driver handles this by emitting a STOP condition to restore\nthe bus.\nHowever, the hardware quirk SVC_I3C_QUIRK_FALSE_SLVSTART indicates that\nemitting a STOP condition may spuriously set the SLVSTART interrupt\nstatus bit. In the Master Request case, this creates a feedback loop:\nthe STOP triggers a new SLVSTART event, the IRQ handler fires again,\nthe controller still reports an MR type, another STOP is emitted, and\nthe cycle repeats indefinitely, resulting in an IRQ storm that can lock\nup the CPU.\nClear the SLVSTART status bit explicitly after emitting the STOP in the\nMaster Request IBI handler when the SVC_I3C_QUIRK_FALSE_SLVSTART quirk\nis set. This breaks the feedback loop without affecting normal SLVSTART\nprocessing, which is already guarded in the top-level IRQ handler by\nchecking that MSTATUS is in SLVREQ state.", "A flaw was found in the Linux kernel's I3C (Improved Inter-Integrated Circuit) master driver. On affected hardware, when a target device on the bus holds the data line low, the controller triggers an interrupt feedback loop during recovery attempts. This issue creates an interrupt storm that can overwhelm the processor, resulting in a system lockup and Denial of Service (DoS)."], "name": "CVE-2026-97515", "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:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97515\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97515\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97515.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e9b139c4684ed8593a0b779ca02ea05f460b2eec)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1effa3adfe53cb2bb28bf5640a676b791d5ab405)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "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": "2026-09-25T00:30:18.223751+00:00", "updated": "2026-10-01T10:30:08.279372+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-400", "CWE-835"]}