{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89606", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.733Z", "datePublished": "2026-09-11T19:45:08.832Z", "dateUpdated": "2026-09-11T19:45:08.832Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:45:08.832Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\necryptfs: reject too-small tag 70 packets\n\necryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the\nparsed packet body size to derive the encrypted filename size. A\nmalformed packet with a body smaller than those fixed fields can underflow\nthat size calculation.\n\nReject tag 70 packets before the subtraction unless the body contains the\nsignature, cipher code, and at least one byte of encrypted filename data."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ecryptfs/keystore.c"], "versions": [{"version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "lessThan": "9d88391bbed76eb091cddd50b0af87b1c6f22589", "status": "affected", "versionType": "git"}, {"version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "lessThan": "b31da1ecf13929a8d7f8d2727843d2fe35396b75", "status": "affected", "versionType": "git"}, {"version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "lessThan": "d2869768eab5648e6edc05f47e0716e5328e6681", "status": "affected", "versionType": "git"}, {"version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "lessThan": "e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ecryptfs/keystore.c"], "versions": [{"version": "2.6.29", "status": "affected"}, {"version": "0", "lessThan": "2.6.29", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "2.6.29", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589"}, {"url": "https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75"}, {"url": "https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681"}, {"url": "https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f"}], "title": "ecryptfs: reject too-small tag 70 packets", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ecryptfs/keystore.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9d88391bbed76eb091cddd50b0af87b1c6f22589", "status": "affected", "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "versionType": "git"}, {"lessThan": "b31da1ecf13929a8d7f8d2727843d2fe35396b75", "status": "affected", "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "versionType": "git"}, {"lessThan": "d2869768eab5648e6edc05f47e0716e5328e6681", "status": "affected", "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "versionType": "git"}, {"lessThan": "e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f", "status": "affected", "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ecryptfs/keystore.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.29"}, {"lessThan": "2.6.29", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\necryptfs: reject too-small tag 70 packets\n\necryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the\nparsed packet body size to derive the encrypted filename size. A\nmalformed packet with a body smaller than those fixed fields can underflow\nthat size calculation.\n\nReject tag 70 packets before the subtraction unless the body contains the\nsignature, cipher code, and at least one byte of encrypted filename data."}], "id": "CVE-2026-89606", "lastModified": "2026-09-11T20:19:45.603", "metrics": {}, "published": "2026-09-11T20:19:45.603", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ecryptfs: Denial of Service via malformed tag 70 packets", "id": "2532266", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532266"}, "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-191", "details": ["A flaw was found in ecryptfs, a component of the Linux kernel. This vulnerability allows a remote attacker to send a specially crafted tag 70 packet with a body smaller than expected. This can lead to an integer underflow during size calculation, potentially causing a denial of service (DoS) or system instability."], "name": "CVE-2026-89606", "public_date": "2026-09-11T19:45:08Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89606\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89606\nhttps://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589\nhttps://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75\nhttps://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681\nhttps://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f"], "threat_severity": "Moderate"}

{"created": "2026-09-12T06:45:10.801862+00:00", "updated": "2026-09-12T12:45:13.973094+00:00", "vendors": []}