{"id":"CVE-2026-92495","state":"PUBLISHED","title":"RDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap\n\nbnxt_re_mmap() rejects VM_WRITE for the DBR_PAGE and TOGGLE_PAGE mmap\nflags, but a read-only mapping can still retain VM_MAYWRITE. nd later\nbe upgraded with mprotect(PROT_WRITE). This can bypass the write check\nthat only runs at mmap time.\n\nClear VM_MAYWRITE before vm_insert_page() in the shared DBR/toggle-page\nbranch, matching the existing policy that userspace writes are not\nexpected for these pages.","publishedAt":"2026-09-17T16:10:10.747Z","updatedAt":"2026-10-19T09:04:01.510Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"5361fb1e5bc246f9a2c0721543f72c8dac200769","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"0afbfe019c881483337d9f8304e678af05ebe7cc","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"518df61b9b0a5b288dfa72c87246045329c18b8c","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/bnxt_re/ib_verbs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","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/infiniband/hw/bnxt_re/ib_verbs.c"]}],"references":["https://git.kernel.org/stable/c/5361fb1e5bc246f9a2c0721543f72c8dac200769","https://git.kernel.org/stable/c/13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4","https://git.kernel.org/stable/c/0afbfe019c881483337d9f8304e678af05ebe7cc","https://git.kernel.org/stable/c/518df61b9b0a5b288dfa72c87246045329c18b8c","https://git.kernel.org/stable/c/9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/92xxx/CVE-2026-92495.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-92495","state":"PUBLISHED","datePublished":"2026-09-17T16:10:10.747Z","dateUpdated":"2026-10-19T09:04:01.510Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-16T12:21:13.871Z"},"containers":{"cna":{"title":"RDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap\n\nbnxt_re_mmap() rejects VM_WRITE for the DBR_PAGE and TOGGLE_PAGE mmap\nflags, but a read-only mapping can still retain VM_MAYWRITE. nd later\nbe upgraded with mprotect(PROT_WRITE). This can bypass the write check\nthat only runs at mmap time.\n\nClear VM_MAYWRITE before vm_insert_page() in the shared DBR/toggle-page\nbranch, matching the existing policy that userspace writes are not\nexpected for these pages."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"5361fb1e5bc246f9a2c0721543f72c8dac200769","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"0afbfe019c881483337d9f8304e678af05ebe7cc","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"518df61b9b0a5b288dfa72c87246045329c18b8c","versionType":"git"},{"version":"ea222485788208cd79bad42d25aae9232b33a934","status":"affected","lessThan":"9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/bnxt_re/ib_verbs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","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/infiniband/hw/bnxt_re/ib_verbs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5361fb1e5bc246f9a2c0721543f72c8dac200769"},{"url":"https://git.kernel.org/stable/c/13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4"},{"url":"https://git.kernel.org/stable/c/0afbfe019c881483337d9f8304e678af05ebe7cc"},{"url":"https://git.kernel.org/stable/c/518df61b9b0a5b288dfa72c87246045329c18b8c"},{"url":"https://git.kernel.org/stable/c/9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:04:01.510Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}