{"id":"CVE-2026-89745","state":"PUBLISHED","title":"debugfs: Fix lockdown check for mmap_prepare","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: Fix lockdown check for mmap_prepare\n\nCommit 651fdda8406d (\"relay: update relay to use mmap_prepare\")\nchanged the `mmap` file operation to `mmap_prepare` for relayfs, but\nthe lockdown check in debugfs was not updated accordingly.\n\nThis prevents debugfs from being locked down when the kernel is in\nintegrity mode if a file uses `mmap_prepare` but not `mmap`.\n\nSince the conversion to `mmap_prepare` across the kernel is not yet\ncomplete, update the lockdown check to look for both `mmap` and\n`mmap_prepare` to ensure comprehensive coverage.","publishedAt":"2026-09-11T19:46:50.758Z","updatedAt":"2026-10-19T08:51:59.176Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"651fdda8406d42a5004c5c79f269540a85d6a1ab","status":"affected","lessThan":"e7f6a6b5741d16fdac7adaecbe0fa52ae756f208","versionType":"git"},{"version":"651fdda8406d42a5004c5c79f269540a85d6a1ab","status":"affected","lessThan":"f81808de37338aac8e167f99bfae647b1b835c70","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/debugfs/file.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.2.4","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":["fs/debugfs/file.c"]}],"references":["https://git.kernel.org/stable/c/e7f6a6b5741d16fdac7adaecbe0fa52ae756f208","https://git.kernel.org/stable/c/f81808de37338aac8e167f99bfae647b1b835c70"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89745.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89745","state":"PUBLISHED","datePublished":"2026-09-11T19:46:50.758Z","dateUpdated":"2026-10-19T08:51:59.176Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.762Z"},"containers":{"cna":{"title":"debugfs: Fix lockdown check for mmap_prepare","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: Fix lockdown check for mmap_prepare\n\nCommit 651fdda8406d (\"relay: update relay to use mmap_prepare\")\nchanged the `mmap` file operation to `mmap_prepare` for relayfs, but\nthe lockdown check in debugfs was not updated accordingly.\n\nThis prevents debugfs from being locked down when the kernel is in\nintegrity mode if a file uses `mmap_prepare` but not `mmap`.\n\nSince the conversion to `mmap_prepare` across the kernel is not yet\ncomplete, update the lockdown check to look for both `mmap` and\n`mmap_prepare` to ensure comprehensive coverage."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"651fdda8406d42a5004c5c79f269540a85d6a1ab","status":"affected","lessThan":"e7f6a6b5741d16fdac7adaecbe0fa52ae756f208","versionType":"git"},{"version":"651fdda8406d42a5004c5c79f269540a85d6a1ab","status":"affected","lessThan":"f81808de37338aac8e167f99bfae647b1b835c70","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/debugfs/file.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.2.4","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":["fs/debugfs/file.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e7f6a6b5741d16fdac7adaecbe0fa52ae756f208"},{"url":"https://git.kernel.org/stable/c/f81808de37338aac8e167f99bfae647b1b835c70"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:51:59.176Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}