{"id":"CVE-2026-89606","revision":"481fb0d9e40c4598a71907acd3ce1954","records":[{"revision":"481fb0d9e40c4598a71907acd3ce1954","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89606","aliases":[],"title":"ecryptfs: reject too-small tag 70 packets","description":"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.","state":0,"publishedAt":"2026-09-11T19:45:08.832+00:00","modifiedAt":"2026-10-19T08:49:37.417+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ecryptfs/keystore.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"df5f375a6151ef71f636da044bcef90c26697255\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"5668121974eb7f7aa82793a9d0d13abadb8904dc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"2e5afed9503dd1d85004c09503adc2cb584c0188\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"414a0f04feb06f03523edf7e2a8be1d7f1a9b160\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"9d88391bbed76eb091cddd50b0af87b1c6f22589\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"b31da1ecf13929a8d7f8d2727843d2fe35396b75\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"d2869768eab5648e6edc05f47e0716e5328e6681\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c79f34f7ee71cd28272332b424ca64b2be006ab\",\n                            \"lessThan\": \"e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ecryptfs/keystore.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.29\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.29\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/df5f375a6151ef71f636da044bcef90c26697255","https://git.kernel.org/stable/c/5668121974eb7f7aa82793a9d0d13abadb8904dc","https://git.kernel.org/stable/c/2e5afed9503dd1d85004c09503adc2cb584c0188","https://git.kernel.org/stable/c/414a0f04feb06f03523edf7e2a8be1d7f1a9b160","https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589","https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75","https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681","https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89606","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89606","identifiers":["CVE-2026-89606"]},"retained":false,"historicalAffected":[]}],"coverage":[]}