{"id":"CVE-2026-98222","state":"PUBLISHED","title":"KEYS: encrypted: fix integer overflow of datablob_len","description":"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 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.","publishedAt":"2026-10-06T08:44:57.621Z","updatedAt":"2026-10-19T09:15:54.199Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"1e720f63dbafc093a8f5d519f05b67724993edd4","versionType":"git"},{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0","versionType":"git"},{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"cca38f2102a4cd35eda8d48950df4817b4b24757","versionType":"git"},{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"8697c431e297eb0d0ab13dda6bc172b48a34f05c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/encrypted-keys/encrypted.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.38","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.38","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/encrypted-keys/encrypted.c"]}],"references":["https://git.kernel.org/stable/c/1e720f63dbafc093a8f5d519f05b67724993edd4","https://git.kernel.org/stable/c/a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0","https://git.kernel.org/stable/c/cca38f2102a4cd35eda8d48950df4817b4b24757","https://git.kernel.org/stable/c/8697c431e297eb0d0ab13dda6bc172b48a34f05c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98222.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98222","state":"PUBLISHED","datePublished":"2026-10-06T08:44:57.621Z","dateUpdated":"2026-10-19T09:15:54.199Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.327Z"},"containers":{"cna":{"title":"KEYS: encrypted: fix integer overflow of datablob_len","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"1e720f63dbafc093a8f5d519f05b67724993edd4","versionType":"git"},{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0","versionType":"git"},{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"cca38f2102a4cd35eda8d48950df4817b4b24757","versionType":"git"},{"version":"7e70cb4978507cf31d76b90e4cfb4c28cad87f0c","status":"affected","lessThan":"8697c431e297eb0d0ab13dda6bc172b48a34f05c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/encrypted-keys/encrypted.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.38","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.38","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/encrypted-keys/encrypted.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1e720f63dbafc093a8f5d519f05b67724993edd4"},{"url":"https://git.kernel.org/stable/c/a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0"},{"url":"https://git.kernel.org/stable/c/cca38f2102a4cd35eda8d48950df4817b4b24757"},{"url":"https://git.kernel.org/stable/c/8697c431e297eb0d0ab13dda6bc172b48a34f05c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:15:54.199Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}