{"id":"CVE-2026-98222","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nKEYS: encrypted: fix integer overflow of datablob_len\n\nencrypted_key_alloc() stores datablob_len in a u16","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nKEYS: encrypted: fix integer overflow of datablob_len\n\nencrypted_key_alloc() stores datablob_len in a u16. It is computed from\nmultiple string and payload lengths. If t…","severity":"high","vendor":"Linux","product":"Linux","affected":["Linux >= 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < 1e720f63dbafc093a8f5d519f05b67724993edd4","Linux >= 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0","Linux >= 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < cca38f2102a4cd35eda8d48950df4817b4b24757","Linux >= 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < 8697c431e297eb0d0ab13dda6bc172b48a34f05c","Linux 2.6.38"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:09.153","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98222","references":[{"url":"https://git.kernel.org/stable/c/1e720f63dbafc093a8f5d519f05b67724993edd4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8697c431e297eb0d0ab13dda6bc172b48a34f05c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cca38f2102a4cd35eda8d48950df4817b4b24757","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98222.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98222"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546385"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98222"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98222"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98222.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-06T08:50:17.440Z","epss":0.00168,"epssPercentile":0.06021,"cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-787"],"slug":"CVE-2026-98222","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nKEYS: encrypted: fix integer overflow of datablob_len\n\nencrypted_key_alloc() stores datablob_len in a u16. It is computed from\nmultiple string and payload lengths. If the result exceeds U16_MAX, the\nassignment truncates the allocation size. KASAN reports a 32760-byte\nslab-out-of-bounds write when __ekey_init() copies the master key\ndescription into the undersized buffer.\n\nThe total payload length stored in key->datalen is also a u16. Use\ncheck_add_overflow() to reject values that do not fit either destination,\nand use kzalloc_flex() for the flexible-array allocation.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98222.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224131,"id":"CVE-2026-98222","ts":1792324945634,"field":"cvss","old":null,"new":"7"},{"seq":224130,"id":"CVE-2026-98222","ts":1792324945634,"field":"severity","old":"none","new":"high"}]}