CVE-2026-99022

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99022", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.386Z", "datePublished": "2026-10-23T12:21:03.138Z", "dateUpdated": "2026-10-30T12:40:59.813Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:40:59.813Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: ltc3676: don't read the write-only HRST and CLIRQ registers\n\nHRST (0x1e) and CLIRQ (0x1f) are write-only command strobes. Writing HRST\ntriggers a hard reset of the chip and writing CLIRQ clears the interrupt;\nreading them returns nothing useful, and the read itself fires the command.\n\nThe result is that a plain register dump resets the board:\n\n cat /sys/kernel/debug/regmap/2-003c/registers\n\nwalks every readable register, hits HRST, and the board reboots.\n\nSplit the callback back in two so HRST and CLIRQ stay writable but are no\nlonger readable. The readable range is left unchanged\n(LTC3676_BUCK1 ... LTC3676_IRQSTAT)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/regulator/ltc3676.c"], "versions": [{"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "4cc1e849bb7dd8deb37f6a51e1aaf725e2016595", "status": "affected", "versionType": "git"}, {"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "0893de2397d85547d4b88379044aa541b07b56af", "status": "affected", "versionType": "git"}, {"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "f8b0ccdcf3ca7cf6e4c2c400e80f81a727f768c7", "status": "affected", "versionType": "git"}, {"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "fd376d83741118e0212f0da985889c1a98d9c827", "status": "affected", "versionType": "git"}, {"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "1fb0d58fd363b439b4faf08a16ee6ae38b575cd4", "status": "affected", "versionType": "git"}, {"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "199a62d70314d21f06a9a6faaa3ef54d0404910c", "status": "affected", "versionType": "git"}, {"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "ca5d85335a8fa6e87b45629f1a07b412482cab17", "status": "affected", "versionType": "git"}, {"version": "37b918a034feda1b1ef404acf003812f37ab8da2", "lessThan": "28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83", "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/regulator/ltc3676.c"], "versions": [{"version": "4.9", "status": "affected"}, {"version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "4.9", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4cc1e849bb7dd8deb37f6a51e1aaf725e2016595"}, {"url": "https://git.kernel.org/stable/c/0893de2397d85547d4b88379044aa541b07b56af"}, {"url": "https://git.kernel.org/stable/c/f8b0ccdcf3ca7cf6e4c2c400e80f81a727f768c7"}, {"url": "https://git.kernel.org/stable/c/fd376d83741118e0212f0da985889c1a98d9c827"}, {"url": "https://git.kernel.org/stable/c/1fb0d58fd363b439b4faf08a16ee6ae38b575cd4"}, {"url": "https://git.kernel.org/stable/c/199a62d70314d21f06a9a6faaa3ef54d0404910c"}, {"url": "https://git.kernel.org/stable/c/ca5d85335a8fa6e87b45629f1a07b412482cab17"}, {"url": "https://git.kernel.org/stable/c/28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83"}], "title": "regulator: ltc3676: don't read the write-only HRST and CLIRQ registers", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/regulator/ltc3676.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4cc1e849bb7dd8deb37f6a51e1aaf725e2016595", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}, {"lessThan": "0893de2397d85547d4b88379044aa541b07b56af", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}, {"lessThan": "f8b0ccdcf3ca7cf6e4c2c400e80f81a727f768c7", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}, {"lessThan": "fd376d83741118e0212f0da985889c1a98d9c827", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}, {"lessThan": "1fb0d58fd363b439b4faf08a16ee6ae38b575cd4", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}, {"lessThan": "199a62d70314d21f06a9a6faaa3ef54d0404910c", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}, {"lessThan": "ca5d85335a8fa6e87b45629f1a07b412482cab17", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}, {"lessThan": "28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83", "status": "affected", "version": "37b918a034feda1b1ef404acf003812f37ab8da2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/regulator/ltc3676.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.9"}, {"lessThan": "4.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\nregulator: ltc3676: don't read the write-only HRST and CLIRQ registers\n\nHRST (0x1e) and CLIRQ (0x1f) are write-only command strobes. Writing HRST\ntriggers a hard reset of the chip and writing CLIRQ clears the interrupt;\nreading them returns nothing useful, and the read itself fires the command.\n\nThe result is that a plain register dump resets the board:\n\n cat /sys/kernel/debug/regmap/2-003c/registers\n\nwalks every readable register, hits HRST, and the board reboots.\n\nSplit the callback back in two so HRST and CLIRQ stay writable but are no\nlonger readable. The readable range is left unchanged\n(LTC3676_BUCK1 ... LTC3676_IRQSTAT)."}], "id": "CVE-2026-99022", "lastModified": "2026-10-30T13:21:38.500", "metrics": {}, "published": "2026-10-23T13:17:25.127", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0893de2397d85547d4b88379044aa541b07b56af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/199a62d70314d21f06a9a6faaa3ef54d0404910c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1fb0d58fd363b439b4faf08a16ee6ae38b575cd4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4cc1e849bb7dd8deb37f6a51e1aaf725e2016595"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca5d85335a8fa6e87b45629f1a07b412482cab17"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f8b0ccdcf3ca7cf6e4c2c400e80f81a727f768c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd376d83741118e0212f0da985889c1a98d9c827"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: regulator: ltc3676: don't read the write-only HRST and CLIRQ registers", "id": "2559716", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559716"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-749", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nregulator: ltc3676: don't read the write-only HRST and CLIRQ registers\nHRST (0x1e) and CLIRQ (0x1f) are write-only command strobes. Writing HRST\ntriggers a hard reset of the chip and writing CLIRQ clears the interrupt;\nreading them returns nothing useful, and the read itself fires the command.\nThe result is that a plain register dump resets the board:\ncat /sys/kernel/debug/regmap/2-003c/registers\nwalks every readable register, hits HRST, and the board reboots.\nSplit the callback back in two so HRST and CLIRQ stay writable but are no\nlonger readable. The readable range is left unchanged\n(LTC3676_BUCK1 ... LTC3676_IRQSTAT).", "A flaw was found in the Linux kernel's LTC3676 regulator driver. The driver improperly marks write-only command registers, including the hardware reset register, as readable. A local user with administrative privileges can cause a Denial of Service (DoS) by reading the regulator registers through debugfs, which unintentionally triggers an immediate hardware reset and reboots the system."], "name": "CVE-2026-99022", "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": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99022\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99022\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99022.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,fd376d83741118e0212f0da985889c1a98d9c827)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,1fb0d58fd363b439b4faf08a16ee6ae38b575cd4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,199a62d70314d21f06a9a6faaa3ef54d0404910c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,ca5d85335a8fa6e87b45629f1a07b412482cab17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,fd376d83741118e0212f0da985889c1a98d9c827)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,1fb0d58fd363b439b4faf08a16ee6ae38b575cd4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,199a62d70314d21f06a9a6faaa3ef54d0404910c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,ca5d85335a8fa6e87b45629f1a07b412482cab17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[37b918a034feda1b1ef404acf003812f37ab8da2,28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"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": "4.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T15:30:14.845995+00:00", "updated": "2026-10-29T19:15:08.626929+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}