{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40193","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.178Z","datePublished":"2025-11-12T21:56:31.751Z","dateUpdated":"2026-05-11T21:44:33.601Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:44:33.601Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxtensa: simdisk: add input size check in proc_write_simdisk\n\nA malicious user could pass an arbitrarily bad value\nto memdup_user_nul(), potentially causing kernel crash.\n\nThis follows the same pattern as commit ee76746387f6\n(\"netdevsim: prevent bad user input in nsim_dev_health_break_write()\")"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/xtensa/platforms/iss/simdisk.c"],"versions":[{"version":"b6c7e873daf765e41233b9752083b66442703b7a","lessThan":"f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf","status":"affected","versionType":"git"},{"version":"b6c7e873daf765e41233b9752083b66442703b7a","lessThan":"151bd88859474cdaccc1e4c8b21fbf72dbba2ab4","status":"affected","versionType":"git"},{"version":"b6c7e873daf765e41233b9752083b66442703b7a","lessThan":"d381de7fd4cdc928ede96987dc64b133e6480dd6","status":"affected","versionType":"git"},{"version":"b6c7e873daf765e41233b9752083b66442703b7a","lessThan":"a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a","status":"affected","versionType":"git"},{"version":"b6c7e873daf765e41233b9752083b66442703b7a","lessThan":"5d5f08fd0cd970184376bee07d59f635c8403f63","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/xtensa/platforms/iss/simdisk.c"],"versions":[{"version":"3.9","status":"affected"},{"version":"0","lessThan":"3.9","status":"unaffected","versionType":"semver"},{"version":"6.1.157","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.113","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.54","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.17.4","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.1.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.6.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.12.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.17.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf"},{"url":"https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4"},{"url":"https://git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6"},{"url":"https://git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a"},{"url":"https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63"}],"title":"xtensa: simdisk: add input size check in proc_write_simdisk","x_generator":{"engine":"bippy-1.2.0"}}}}