CVE-2026-98935

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98935", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.381Z", "datePublished": "2026-10-23T12:11:46.041Z", "dateUpdated": "2026-10-30T12:40:24.910Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:40:24.910Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak\n\nThe struct rtc_wkalrm has padding holes after the 'pending' member.\nWhen returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized\nkernel stack data residing in these holes may be leaked.\n\nZero-initialize the struct at declaration to eliminate this information\nleak risk.\n\nFixes smatch warnings:\n- drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't\n leak information (struct has a hole after 'pending')"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/rtc/dev.c"], "versions": [{"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "lessThan": "f84eb9b7b0feeb267a174237d70a857042ce0158", "status": "affected", "versionType": "git"}, {"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "lessThan": "a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb", "status": "affected", "versionType": "git"}, {"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "lessThan": "beda3c9730ad3087d01aa1d0415c40942042ec87", "status": "affected", "versionType": "git"}, {"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "lessThan": "00dc50cede96738dadc64b20e671186cddb8a58d", "status": "affected", "versionType": "git"}, {"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "lessThan": "2838d7bbb551861c25187dfb581ed6e7a56762e9", "status": "affected", "versionType": "git"}, {"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "lessThan": "0ee5c5d804d592a8328a425b9274487d393d3a05", "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/rtc/dev.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "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": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "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": "5.0", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f84eb9b7b0feeb267a174237d70a857042ce0158"}, {"url": "https://git.kernel.org/stable/c/a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb"}, {"url": "https://git.kernel.org/stable/c/beda3c9730ad3087d01aa1d0415c40942042ec87"}, {"url": "https://git.kernel.org/stable/c/00dc50cede96738dadc64b20e671186cddb8a58d"}, {"url": "https://git.kernel.org/stable/c/2838d7bbb551861c25187dfb581ed6e7a56762e9"}, {"url": "https://git.kernel.org/stable/c/0ee5c5d804d592a8328a425b9274487d393d3a05"}], "title": "rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/rtc/dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f84eb9b7b0feeb267a174237d70a857042ce0158", "status": "affected", "version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "versionType": "git"}, {"lessThan": "a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb", "status": "affected", "version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "versionType": "git"}, {"lessThan": "beda3c9730ad3087d01aa1d0415c40942042ec87", "status": "affected", "version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "versionType": "git"}, {"lessThan": "00dc50cede96738dadc64b20e671186cddb8a58d", "status": "affected", "version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "versionType": "git"}, {"lessThan": "2838d7bbb551861c25187dfb581ed6e7a56762e9", "status": "affected", "version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "versionType": "git"}, {"lessThan": "0ee5c5d804d592a8328a425b9274487d393d3a05", "status": "affected", "version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/rtc/dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"lessThan": "5.0", "status": "unaffected", "version": "0", "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": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "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\nrtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak\n\nThe struct rtc_wkalrm has padding holes after the 'pending' member.\nWhen returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized\nkernel stack data residing in these holes may be leaked.\n\nZero-initialize the struct at declaration to eliminate this information\nleak risk.\n\nFixes smatch warnings:\n- drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't\n leak information (struct has a hole after 'pending')"}], "id": "CVE-2026-98935", "lastModified": "2026-10-30T13:21:32.003", "metrics": {}, "published": "2026-10-23T13:17:14.377", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00dc50cede96738dadc64b20e671186cddb8a58d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ee5c5d804d592a8328a425b9274487d393d3a05"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2838d7bbb551861c25187dfb581ed6e7a56762e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/beda3c9730ad3087d01aa1d0415c40942042ec87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f84eb9b7b0feeb267a174237d70a857042ce0158"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: kernel: Information disclosure via uninitialized stack memory in RTC driver", "id": "2559681", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559681"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-908", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nrtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak\nThe struct rtc_wkalrm has padding holes after the 'pending' member.\nWhen returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized\nkernel stack data residing in these holes may be leaked.\nZero-initialize the struct at declaration to eliminate this information\nleak risk.\nFixes smatch warnings:\n- drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't\nleak information (struct has a hole after 'pending')", "A flaw was found in the Linux kernel's Real-Time Clock (RTC) driver. This information disclosure vulnerability occurs because the driver fails to initialize memory padding within an internal data structure before copying alarm details to user space. A local user can exploit this flaw by querying the RTC alarm settings to read uninitialized kernel stack memory, potentially exposing sensitive system data."], "name": "CVE-2026-98935", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T12:11:46Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98935\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98935\nhttps://git.kernel.org/stable/c/00dc50cede96738dadc64b20e671186cddb8a58d\nhttps://git.kernel.org/stable/c/0ee5c5d804d592a8328a425b9274487d393d3a05\nhttps://git.kernel.org/stable/c/2838d7bbb551861c25187dfb581ed6e7a56762e9\nhttps://git.kernel.org/stable/c/a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb\nhttps://git.kernel.org/stable/c/beda3c9730ad3087d01aa1d0415c40942042ec87"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,beda3c9730ad3087d01aa1d0415c40942042ec87)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,00dc50cede96738dadc64b20e671186cddb8a58d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,2838d7bbb551861c25187dfb581ed6e7a56762e9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,0ee5c5d804d592a8328a425b9274487d393d3a05)"}}], "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": "5.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.0)"}}, {"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": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"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": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,beda3c9730ad3087d01aa1d0415c40942042ec87)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,00dc50cede96738dadc64b20e671186cddb8a58d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,2838d7bbb551861c25187dfb581ed6e7a56762e9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62,0ee5c5d804d592a8328a425b9274487d393d3a05)"}}], "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": "5.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.0)"}}, {"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": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"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": "2026-10-23T17:00:14.303047+00:00", "updated": "2026-10-29T14:00:17.124395+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-200", "CWE-908"]}