{"id":"CVE-2026-98751","state":"PUBLISHED","title":"tty: abort break signalling on hangup","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: abort break signalling on hangup\n\nThe break ioctls can race with hangup and end up calling into a tty\ndriver for a device that is already gone or powered down.\n\nDrivers must handle this race, but TCSBRK and TCSBRKP should still be\naborted to avoid calling back into the driver after a user-controlled\ntimeout (possibly even after the tty has been reopened).\n\nNote that drivers should disable any break state on shutdown so just\nreturn on hangup (calling break_ctl() again is racy and will most likely\nfail for drivers handling the race).","publishedAt":"2026-10-18T15:47:36.026Z","updatedAt":"2026-10-30T12:39:21.567Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"70fa2bec352d9f949b882af3c380b916e4a29a43","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"8224d25534580d07925607bbd617daf9c8de26c3","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"8a0f0f9ef41cb80de4d5da4ae146df3075463f6b","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"6c9c9367351a461d62e5c0a39bffdcfbb40f068b","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"3bc82999fb85cecc7eb6ec1755ee7d698aa1e783","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"94af6cd832e9b4ce39a8fb59144a8f09ab56fd35","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"845a2737e0f5ffe5ca8d38de556012b0c9472cdd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/tty_io.c","include/linux/tty.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.26","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/tty_io.c","include/linux/tty.h"]}],"references":["https://git.kernel.org/stable/c/70fa2bec352d9f949b882af3c380b916e4a29a43","https://git.kernel.org/stable/c/8224d25534580d07925607bbd617daf9c8de26c3","https://git.kernel.org/stable/c/8a0f0f9ef41cb80de4d5da4ae146df3075463f6b","https://git.kernel.org/stable/c/6c9c9367351a461d62e5c0a39bffdcfbb40f068b","https://git.kernel.org/stable/c/3bc82999fb85cecc7eb6ec1755ee7d698aa1e783","https://git.kernel.org/stable/c/94af6cd832e9b4ce39a8fb59144a8f09ab56fd35","https://git.kernel.org/stable/c/c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6","https://git.kernel.org/stable/c/845a2737e0f5ffe5ca8d38de556012b0c9472cdd"],"weaknesses":[],"ingestedAt":"2026-10-30T12:58:04.520Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98751.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98751","state":"PUBLISHED","datePublished":"2026-10-18T15:47:36.026Z","dateUpdated":"2026-10-30T12:39:21.567Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.368Z"},"containers":{"cna":{"title":"tty: abort break signalling on hangup","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: abort break signalling on hangup\n\nThe break ioctls can race with hangup and end up calling into a tty\ndriver for a device that is already gone or powered down.\n\nDrivers must handle this race, but TCSBRK and TCSBRKP should still be\naborted to avoid calling back into the driver after a user-controlled\ntimeout (possibly even after the tty has been reopened).\n\nNote that drivers should disable any break state on shutdown so just\nreturn on hangup (calling break_ctl() again is racy and will most likely\nfail for drivers handling the race)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"70fa2bec352d9f949b882af3c380b916e4a29a43","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"8224d25534580d07925607bbd617daf9c8de26c3","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"8a0f0f9ef41cb80de4d5da4ae146df3075463f6b","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"6c9c9367351a461d62e5c0a39bffdcfbb40f068b","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"3bc82999fb85cecc7eb6ec1755ee7d698aa1e783","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"94af6cd832e9b4ce39a8fb59144a8f09ab56fd35","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6","versionType":"git"},{"version":"f34d7a5b7010b82fe97da95496b9971435530062","status":"affected","lessThan":"845a2737e0f5ffe5ca8d38de556012b0c9472cdd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/tty_io.c","include/linux/tty.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.26","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/tty_io.c","include/linux/tty.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/70fa2bec352d9f949b882af3c380b916e4a29a43"},{"url":"https://git.kernel.org/stable/c/8224d25534580d07925607bbd617daf9c8de26c3"},{"url":"https://git.kernel.org/stable/c/8a0f0f9ef41cb80de4d5da4ae146df3075463f6b"},{"url":"https://git.kernel.org/stable/c/6c9c9367351a461d62e5c0a39bffdcfbb40f068b"},{"url":"https://git.kernel.org/stable/c/3bc82999fb85cecc7eb6ec1755ee7d698aa1e783"},{"url":"https://git.kernel.org/stable/c/94af6cd832e9b4ce39a8fb59144a8f09ab56fd35"},{"url":"https://git.kernel.org/stable/c/c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6"},{"url":"https://git.kernel.org/stable/c/845a2737e0f5ffe5ca8d38de556012b0c9472cdd"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:39:21.567Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}