{"id":"CVE-2025-40286","state":"PUBLISHED","title":"smb/server: fix possible memory leak in smb2_read()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix possible memory leak in smb2_read()\n\nMemory leak occurs when ksmbd_vfs_read() fails.\nFix this by adding the missing kvfree().","publishedAt":"2025-12-06T21:51:12.169Z","updatedAt":"2026-05-11T21:46:24.832Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"0797c6cf3b857cc229ab2bc69552938dcd738d78","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"63d8706a2c09a0c29b8b0e8a44bc7a1339685de9","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"f1305587731886da37a214cda812ade246c653b0","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"bfda5422a16651d0bf864ec468b1c216e1b10d91","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"6fced056d2cc8d01b326e6fcfabaacb9850b71a4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/smb2pdu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.59","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.9","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/smb2pdu.c"]}],"references":["https://git.kernel.org/stable/c/0797c6cf3b857cc229ab2bc69552938dcd738d78","https://git.kernel.org/stable/c/63d8706a2c09a0c29b8b0e8a44bc7a1339685de9","https://git.kernel.org/stable/c/f1305587731886da37a214cda812ade246c653b0","https://git.kernel.org/stable/c/bfda5422a16651d0bf864ec468b1c216e1b10d91","https://git.kernel.org/stable/c/6fced056d2cc8d01b326e6fcfabaacb9850b71a4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40286.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40286","state":"PUBLISHED","datePublished":"2025-12-06T21:51:12.169Z","dateUpdated":"2026-05-11T21:46:24.832Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.184Z"},"containers":{"cna":{"title":"smb/server: fix possible memory leak in smb2_read()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix possible memory leak in smb2_read()\n\nMemory leak occurs when ksmbd_vfs_read() fails.\nFix this by adding the missing kvfree()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"0797c6cf3b857cc229ab2bc69552938dcd738d78","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"63d8706a2c09a0c29b8b0e8a44bc7a1339685de9","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"f1305587731886da37a214cda812ade246c653b0","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"bfda5422a16651d0bf864ec468b1c216e1b10d91","versionType":"git"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","status":"affected","lessThan":"6fced056d2cc8d01b326e6fcfabaacb9850b71a4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/smb2pdu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.59","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.9","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/smb2pdu.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0797c6cf3b857cc229ab2bc69552938dcd738d78"},{"url":"https://git.kernel.org/stable/c/63d8706a2c09a0c29b8b0e8a44bc7a1339685de9"},{"url":"https://git.kernel.org/stable/c/f1305587731886da37a214cda812ade246c653b0"},{"url":"https://git.kernel.org/stable/c/bfda5422a16651d0bf864ec468b1c216e1b10d91"},{"url":"https://git.kernel.org/stable/c/6fced056d2cc8d01b326e6fcfabaacb9850b71a4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:46:24.832Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.159"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.59"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.17.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}