{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68385", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.387Z", "datePublished": "2026-08-10T12:04:04.281Z", "dateUpdated": "2026-08-10T12:04:04.281Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-10T12:04:04.281Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/checksum: Fix csum_partial() without vector facility\n\nCurrently csum_partial() calls csum_copy() with copy=false and dst=NULL.\nOn machines without the vector facility, csum_copy() falls back to\ncksm(dst, ...), causing the checksum to be calculated from address zero\ninstead of the source buffer.\n\nThe VX implementation already checksums data loaded from src. Make the\nfallback do the same by passing src to cksm()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/lib/csum-partial.c"], "versions": [{"version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "lessThan": "5fc0a2a6eeb99cac991242bb48796c7749ce3261", "status": "affected", "versionType": "git"}, {"version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "lessThan": "1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722", "status": "affected", "versionType": "git"}, {"version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "lessThan": "898bb2814f38399108bdd2113f38d97383a7036a", "status": "affected", "versionType": "git"}, {"version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "lessThan": "4bb06b60d982355e22647b3d12d6619419f8c1fa", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/lib/csum-partial.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc4", "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": "6.9", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.2-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5fc0a2a6eeb99cac991242bb48796c7749ce3261"}, {"url": "https://git.kernel.org/stable/c/1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722"}, {"url": "https://git.kernel.org/stable/c/898bb2814f38399108bdd2113f38d97383a7036a"}, {"url": "https://git.kernel.org/stable/c/4bb06b60d982355e22647b3d12d6619419f8c1fa"}], "title": "s390/checksum: Fix csum_partial() without vector facility", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/s390/lib/csum-partial.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5fc0a2a6eeb99cac991242bb48796c7749ce3261", "status": "affected", "version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "versionType": "git"}, {"lessThan": "1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722", "status": "affected", "version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "versionType": "git"}, {"lessThan": "898bb2814f38399108bdd2113f38d97383a7036a", "status": "affected", "version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "versionType": "git"}, {"lessThan": "4bb06b60d982355e22647b3d12d6619419f8c1fa", "status": "affected", "version": "dcd3e1de9d17dc43dfed87a9fc814b9dec508043", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/s390/lib/csum-partial.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.101", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.42", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc4", "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\ns390/checksum: Fix csum_partial() without vector facility\n\nCurrently csum_partial() calls csum_copy() with copy=false and dst=NULL.\nOn machines without the vector facility, csum_copy() falls back to\ncksm(dst, ...), causing the checksum to be calculated from address zero\ninstead of the source buffer.\n\nThe VX implementation already checksums data loaded from src. Make the\nfallback do the same by passing src to cksm()."}], "id": "CVE-2026-68385", "lastModified": "2026-08-10T13:20:31.713", "metrics": {}, "published": "2026-08-10T13:20:31.713", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4bb06b60d982355e22647b3d12d6619419f8c1fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5fc0a2a6eeb99cac991242bb48796c7749ce3261"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/898bb2814f38399108bdd2113f38d97383a7036a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel (s390/checksum): Incorrect checksum calculation in csum_partial()", "id": "2513300", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513300"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ns390/checksum: Fix csum_partial() without vector facility\nCurrently csum_partial() calls csum_copy() with copy=false and dst=NULL.\nOn machines without the vector facility, csum_copy() falls back to\ncksm(dst, ...), causing the checksum to be calculated from address zero\ninstead of the source buffer.\nThe VX implementation already checksums data loaded from src. Make the\nfallback do the same by passing src to cksm().", "A flaw was found in the Linux kernel's s390 architecture checksumming mechanism. On systems without a vector facility, the csum_partial() function incorrectly calculates checksums. This occurs because the csum_copy() function, when called with specific parameters, falls back to calculating the checksum from memory address zero instead of the intended source buffer. This can lead to incorrect checksums, potentially affecting data integrity within the kernel."], "name": "CVE-2026-68385", "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": "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": "Out of support scope", "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": "2026-08-10T12:04:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68385\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68385\nhttps://git.kernel.org/stable/c/1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722\nhttps://git.kernel.org/stable/c/4bb06b60d982355e22647b3d12d6619419f8c1fa\nhttps://git.kernel.org/stable/c/5fc0a2a6eeb99cac991242bb48796c7749ce3261\nhttps://git.kernel.org/stable/c/898bb2814f38399108bdd2113f38d97383a7036a"], "threat_severity": "Moderate"}