CVE-2026-99135

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99135", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.394Z", "datePublished": "2026-10-28T10:34:47.902Z", "dateUpdated": "2026-10-30T12:42:08.647Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:42:08.647Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: fix infinite loop on discard with large tag size\n\nWhen integrity_metadata handles a discard, it fills a buffer with\nDISCARD_FILLER and writes it over the tags, max_blocks blocks at a\ntime. If the kmalloc fails, the buffer is the on-stack array\nchecksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. So if the\ntag size is larger than HASH_MAX_DIGESTSIZE, max_blocks is zero, bi_size\nis never decremented and the loop never terminates.\n\nFix this by using sizeof(checksums_onstack) as max_size. The array has\nMAX_TAG_SIZE bytes since commit b93b6643e9b5 (\"dm integrity: fix a\ncrash with unusually large tag size\"), so max_blocks is at least 1."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-integrity.c"], "versions": [{"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "f41a224b3c9d66c7b59afc7cae02a8b214f3c684", "status": "affected", "versionType": "git"}, {"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "c66f5c6ccfa832d28b44a66c01e3468c246adac4", "status": "affected", "versionType": "git"}, {"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "41a18e6c6e2c4a912494a035c17ecfe79c68b9e6", "status": "affected", "versionType": "git"}, {"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "bbc154a7da4e075aef720ef051aff6094400eb66", "status": "affected", "versionType": "git"}, {"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "c4cba6670fa199415689f67108e96b0ba469d767", "status": "affected", "versionType": "git"}, {"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "fc512700f1413fed652dac22fa1c4e837210b9c0", "status": "affected", "versionType": "git"}, {"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "251b44b424920df9204e88a81fb3f78fa48ddd99", "status": "affected", "versionType": "git"}, {"version": "84597a44a9d86ac949900441cea7da0af0f2f473", "lessThan": "18d80c77b4c7dd20699e81cedfbbff4e9d198f28", "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/md/dm-integrity.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "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": "6.6.161", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.115", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.59", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.13", "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": "5.7", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.6.161"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.12.115"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.18.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.2.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f41a224b3c9d66c7b59afc7cae02a8b214f3c684"}, {"url": "https://git.kernel.org/stable/c/c66f5c6ccfa832d28b44a66c01e3468c246adac4"}, {"url": "https://git.kernel.org/stable/c/41a18e6c6e2c4a912494a035c17ecfe79c68b9e6"}, {"url": "https://git.kernel.org/stable/c/bbc154a7da4e075aef720ef051aff6094400eb66"}, {"url": "https://git.kernel.org/stable/c/c4cba6670fa199415689f67108e96b0ba469d767"}, {"url": "https://git.kernel.org/stable/c/fc512700f1413fed652dac22fa1c4e837210b9c0"}, {"url": "https://git.kernel.org/stable/c/251b44b424920df9204e88a81fb3f78fa48ddd99"}, {"url": "https://git.kernel.org/stable/c/18d80c77b4c7dd20699e81cedfbbff4e9d198f28"}], "title": "dm-integrity: fix infinite loop on discard with large tag size", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/md/dm-integrity.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f41a224b3c9d66c7b59afc7cae02a8b214f3c684", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}, {"lessThan": "c66f5c6ccfa832d28b44a66c01e3468c246adac4", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}, {"lessThan": "41a18e6c6e2c4a912494a035c17ecfe79c68b9e6", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}, {"lessThan": "bbc154a7da4e075aef720ef051aff6094400eb66", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}, {"lessThan": "c4cba6670fa199415689f67108e96b0ba469d767", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}, {"lessThan": "fc512700f1413fed652dac22fa1c4e837210b9c0", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}, {"lessThan": "251b44b424920df9204e88a81fb3f78fa48ddd99", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}, {"lessThan": "18d80c77b4c7dd20699e81cedfbbff4e9d198f28", "status": "affected", "version": "84597a44a9d86ac949900441cea7da0af0f2f473", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/md/dm-integrity.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "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": "6.6.161", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.115", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.59", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.13", "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\ndm-integrity: fix infinite loop on discard with large tag size\n\nWhen integrity_metadata handles a discard, it fills a buffer with\nDISCARD_FILLER and writes it over the tags, max_blocks blocks at a\ntime. If the kmalloc fails, the buffer is the on-stack array\nchecksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. So if the\ntag size is larger than HASH_MAX_DIGESTSIZE, max_blocks is zero, bi_size\nis never decremented and the loop never terminates.\n\nFix this by using sizeof(checksums_onstack) as max_size. The array has\nMAX_TAG_SIZE bytes since commit b93b6643e9b5 (\"dm integrity: fix a\ncrash with unusually large tag size\"), so max_blocks is at least 1."}], "id": "CVE-2026-99135", "lastModified": "2026-10-30T13:21:47.757", "metrics": {}, "published": "2026-10-28T11:17:33.400", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18d80c77b4c7dd20699e81cedfbbff4e9d198f28"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/251b44b424920df9204e88a81fb3f78fa48ddd99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/41a18e6c6e2c4a912494a035c17ecfe79c68b9e6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbc154a7da4e075aef720ef051aff6094400eb66"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c4cba6670fa199415689f67108e96b0ba469d767"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c66f5c6ccfa832d28b44a66c01e3468c246adac4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f41a224b3c9d66c7b59afc7cae02a8b214f3c684"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fc512700f1413fed652dac22fa1c4e837210b9c0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: kernel: Denial of Service via infinite loop in dm-integrity discard handling", "id": "2562699", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2562699"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/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:\ndm-integrity: fix infinite loop on discard with large tag size\nWhen integrity_metadata handles a discard, it fills a buffer with\nDISCARD_FILLER and writes it over the tags, max_blocks blocks at a\ntime. If the kmalloc fails, the buffer is the on-stack array\nchecksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. So if the\ntag size is larger than HASH_MAX_DIGESTSIZE, max_blocks is zero, bi_size\nis never decremented and the loop never terminates.\nFix this by using sizeof(checksums_onstack) as max_size. The array has\nMAX_TAG_SIZE bytes since commit b93b6643e9b5 (\"dm integrity: fix a\ncrash with unusually large tag size\"), so max_blocks is at least 1.", "A flaw was found in the Linux kernel's Device Mapper integrity (dm-integrity) subsystem. When processing storage discard requests under low-memory conditions with large integrity tag sizes, an error-handling path fails to properly advance the processing loop. A local user could exploit this condition to trigger an infinite loop in the kernel, leading to a system hang and a Denial of Service (DoS)."], "name": "CVE-2026-99135", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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": "Fix deferred", "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": "2026-10-28T10:34:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99135\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99135\nhttps://git.kernel.org/stable/c/18d80c77b4c7dd20699e81cedfbbff4e9d198f28\nhttps://git.kernel.org/stable/c/251b44b424920df9204e88a81fb3f78fa48ddd99\nhttps://git.kernel.org/stable/c/fc512700f1413fed652dac22fa1c4e837210b9c0"], "threat_severity": "Moderate"}

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