{"id":"CVE-2025-21793","state":"PUBLISHED","title":"spi: sn-f-ospi: Fix division by zero","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nspi: sn-f-ospi: Fix division by zero\n\nWhen there is no dummy cycle in the spi-nor commands, both dummy bus cycle\nbytes and width are zero. Because of the cpu's warning when divided by\nzero, the warning should be avoided. Return just zero to avoid such\ncalculations.","publishedAt":"2025-02-27T02:18:30.281Z","updatedAt":"2026-05-11T21:06:36.434Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"966328191b4c389c0f2159fa242915f51cbc1679","versionType":"git"},{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"4df6f005bef04a3dd16c028124a1b5684db3922b","versionType":"git"},{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"7434135553bc03809a55803ee6a8dcaae6240d55","versionType":"git"},{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"3588b1c0fde2f58d166e3f94a5a58d64b893526c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/spi/spi-sn-f-ospi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.79","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.16","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.4","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/spi/spi-sn-f-ospi.c"]}],"references":["https://git.kernel.org/stable/c/966328191b4c389c0f2159fa242915f51cbc1679","https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b","https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55","https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c"],"weaknesses":["CWE-369"],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/21xxx/CVE-2025-21793.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21793","state":"PUBLISHED","datePublished":"2025-02-27T02:18:30.281Z","dateUpdated":"2026-05-11T21:06:36.434Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.767Z"},"containers":{"cna":{"title":"spi: sn-f-ospi: Fix division by zero","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nspi: sn-f-ospi: Fix division by zero\n\nWhen there is no dummy cycle in the spi-nor commands, both dummy bus cycle\nbytes and width are zero. Because of the cpu's warning when divided by\nzero, the warning should be avoided. Return just zero to avoid such\ncalculations."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"966328191b4c389c0f2159fa242915f51cbc1679","versionType":"git"},{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"4df6f005bef04a3dd16c028124a1b5684db3922b","versionType":"git"},{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"7434135553bc03809a55803ee6a8dcaae6240d55","versionType":"git"},{"version":"1b74dd64c8612619e399e5a31da79a3636914495","status":"affected","lessThan":"3588b1c0fde2f58d166e3f94a5a58d64b893526c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/spi/spi-sn-f-ospi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.79","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.16","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.4","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/spi/spi-sn-f-ospi.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/966328191b4c389c0f2159fa242915f51cbc1679"},{"url":"https://git.kernel.org/stable/c/4df6f005bef04a3dd16c028124a1b5684db3922b"},{"url":"https://git.kernel.org/stable/c/7434135553bc03809a55803ee6a8dcaae6240d55"},{"url":"https://git.kernel.org/stable/c/3588b1c0fde2f58d166e3f94a5a58d64b893526c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:06:36.434Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.13.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2025-21793","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:29:03.317315Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-369","lang":"en","type":"CWE","description":"CWE-369 Divide By Zero"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:36:39.316Z"}}]}}}