{"id":"CVE-2026-72238","state":"PUBLISHED","title":"x86/boot: Validate console=uart8250 baud rate to fix early boot hang","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/boot: Validate console=uart8250 baud rate to fix early boot hang\n\nWhen the baud rate is empty, 0, invalid, or overflows to 0 when stored\nas an int, the system will hang during early boot because of a division\nby zero in early_serial_init().\n\nFall back to DEFAULT_BAUD when the resulting baud rate is 0 to prevent\nan early system hang.","publishedAt":"2026-08-15T05:54:27.424Z","updatedAt":"2026-08-17T05:10:56.018Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"c1a276a731d02cbb728d0530f327a68728f2d8b0","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"24fbed0a2a45f5f379ef2b53bd2abe58be1142ad","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"efa96a22613b86e05cd81229ce0be411c1a4a79a","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"9a77a7639dfdc3eca417cd37620ce64da79c80c4","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"b4d05032e9af7137eab8f3af2855073f896ca843","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"f7c67c97b37c11f2a95c204092fb8159f2779e8f","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"4dad7e870c7e5178f71b5e1e4f67934b9e8cc207","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"ffa0aa5b625fe0bed7463ac613f8b06676ff4542","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/boot/early_serial_console.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.36","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.36","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/boot/early_serial_console.c"]}],"references":["https://git.kernel.org/stable/c/c1a276a731d02cbb728d0530f327a68728f2d8b0","https://git.kernel.org/stable/c/24fbed0a2a45f5f379ef2b53bd2abe58be1142ad","https://git.kernel.org/stable/c/efa96a22613b86e05cd81229ce0be411c1a4a79a","https://git.kernel.org/stable/c/9a77a7639dfdc3eca417cd37620ce64da79c80c4","https://git.kernel.org/stable/c/b4d05032e9af7137eab8f3af2855073f896ca843","https://git.kernel.org/stable/c/f7c67c97b37c11f2a95c204092fb8159f2779e8f","https://git.kernel.org/stable/c/4dad7e870c7e5178f71b5e1e4f67934b9e8cc207","https://git.kernel.org/stable/c/ffa0aa5b625fe0bed7463ac613f8b06676ff4542"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72238.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72238","state":"PUBLISHED","datePublished":"2026-08-15T05:54:27.424Z","dateUpdated":"2026-08-17T05:10:56.018Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.914Z"},"containers":{"cna":{"title":"x86/boot: Validate console=uart8250 baud rate to fix early boot hang","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/boot: Validate console=uart8250 baud rate to fix early boot hang\n\nWhen the baud rate is empty, 0, invalid, or overflows to 0 when stored\nas an int, the system will hang during early boot because of a division\nby zero in early_serial_init().\n\nFall back to DEFAULT_BAUD when the resulting baud rate is 0 to prevent\nan early system hang."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"c1a276a731d02cbb728d0530f327a68728f2d8b0","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"24fbed0a2a45f5f379ef2b53bd2abe58be1142ad","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"efa96a22613b86e05cd81229ce0be411c1a4a79a","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"9a77a7639dfdc3eca417cd37620ce64da79c80c4","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"b4d05032e9af7137eab8f3af2855073f896ca843","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"f7c67c97b37c11f2a95c204092fb8159f2779e8f","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"4dad7e870c7e5178f71b5e1e4f67934b9e8cc207","versionType":"git"},{"version":"ce0aa5dd20e44372f9617dd67c984f41fcdbed88","status":"affected","lessThan":"ffa0aa5b625fe0bed7463ac613f8b06676ff4542","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/boot/early_serial_console.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.36","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.36","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/boot/early_serial_console.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c1a276a731d02cbb728d0530f327a68728f2d8b0"},{"url":"https://git.kernel.org/stable/c/24fbed0a2a45f5f379ef2b53bd2abe58be1142ad"},{"url":"https://git.kernel.org/stable/c/efa96a22613b86e05cd81229ce0be411c1a4a79a"},{"url":"https://git.kernel.org/stable/c/9a77a7639dfdc3eca417cd37620ce64da79c80c4"},{"url":"https://git.kernel.org/stable/c/b4d05032e9af7137eab8f3af2855073f896ca843"},{"url":"https://git.kernel.org/stable/c/f7c67c97b37c11f2a95c204092fb8159f2779e8f"},{"url":"https://git.kernel.org/stable/c/4dad7e870c7e5178f71b5e1e4f67934b9e8cc207"},{"url":"https://git.kernel.org/stable/c/ffa0aa5b625fe0bed7463ac613f8b06676ff4542"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:10:56.018Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}