{"id":"CVE-2025-21844","revision":null,"records":[{"revision":"24547443081549e9be37f64af31b6c78","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21844","aliases":[],"title":"smb: client: Add check for next_buffer in receive_encrypted_standard()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Add check for next_buffer in receive_encrypted_standard()\n\nAdd check for the return value of cifs_buf_get() and cifs_small_buf_get()\nin receive_encrypted_standard() to prevent null pointer dereference.","state":0,"publishedAt":"2025-03-12T09:42:00.435+00:00","modifiedAt":"2026-10-15T01:04:42.188+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/smb/client/smb2ops.c\"\n ],\n \"versions\": [\n {\n \"version\": \"b03c8099a738a04d2343547ae6a04e5f0f63d3fa\",\n \"lessThan\": \"f277e479eea3d1aa18bc712abe1d2bf3dece2e30\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"858e73ff25639a0cc1f6f8d2587b62c045867e41\",\n \"lessThan\": \"f618aeb6cad2307e48a641379db610abcf593edf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"9f528a8e68327117837b5e28b096f52af4c26a05\",\n \"lessThan\": \"24e8e4523d3071bc5143b0db9127d511489f7b3b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"534733397da26de0303057ce0b93a22bda150365\",\n \"lessThan\": \"9e5d99a4cf2e23c716b44862975548415fae5391\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eec04ea119691e65227a97ce53c0da6b9b74b0b7\",\n \"lessThan\": \"a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eec04ea119691e65227a97ce53c0da6b9b74b0b7\",\n \"lessThan\": \"554736b583f529ee159aa95af9a0cbc12b5ffc96\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eec04ea119691e65227a97ce53c0da6b9b74b0b7\",\n \"lessThan\": \"860ca5e50f73c2a1cef7eefc9d39d04e275417f7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.10.211\",\n \"lessThan\": \"5.10.235\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.150\",\n \"lessThan\": \"5.15.179\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.69\",\n \"lessThan\": \"6.1.130\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.8\",\n \"lessThan\": \"6.6.80\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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/smb/client/smb2ops.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.7\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.7\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.235\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.179\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.130\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.80\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.17\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.13.5\",\n \"lessThanOrEqual\": \"6.13.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.14\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f277e479eea3d1aa18bc712abe1d2bf3dece2e30","https://git.kernel.org/stable/c/f618aeb6cad2307e48a641379db610abcf593edf","https://git.kernel.org/stable/c/24e8e4523d3071bc5143b0db9127d511489f7b3b","https://git.kernel.org/stable/c/9e5d99a4cf2e23c716b44862975548415fae5391","https://git.kernel.org/stable/c/a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd","https://git.kernel.org/stable/c/554736b583f529ee159aa95af9a0cbc12b5ffc96","https://git.kernel.org/stable/c/860ca5e50f73c2a1cef7eefc9d39d04e275417f7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21844","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21844","identifiers":["CVE-2025-21844"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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