{"id":"CVE-2026-43163","state":"PUBLISHED","title":"md/bitmap: fix GPF in write_page caused by resize race","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/bitmap: fix GPF in write_page caused by resize race\n\nA General Protection Fault occurs in write_page() during array resize:\nRIP: 0010:write_page+0x22b/0x3c0 [md_mod]\n\nThis is a use-after-free race between bitmap_daemon_work() and\n__bitmap_resize(). The daemon iterates over `bitmap->storage.filemap`\nwithout locking, while the resize path frees that storage via\nmd_bitmap_file_unmap(). `quiesce()` does not stop the md thread,\nallowing concurrent access to freed pages.\n\nFix by holding `mddev->bitmap_info.mutex` during the bitmap update.","publishedAt":"2026-05-06T11:27:41.265Z","updatedAt":"2026-05-11T22:18:58.873Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"140cc839fbeb1ddb33a8da8811b716d88d3905b7","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"d3af62411e19752c663fe4f424dbf49d95a4cc7c","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"d92b8fac294b5f915c50e65ce4ae2262e53614ec","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"a437e3bf30e32846079e470c1ba5ee790bccdf89","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"5f73c8b33df9a605a591eab72d43a969600c1f8c","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"46ef85f854dfa9d5226b3c1c46493d79556c9589","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md-bitmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.5","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md-bitmap.c"]}],"references":["https://git.kernel.org/stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7","https://git.kernel.org/stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8","https://git.kernel.org/stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7c","https://git.kernel.org/stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ec","https://git.kernel.org/stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89","https://git.kernel.org/stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f","https://git.kernel.org/stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8c","https://git.kernel.org/stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43163.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43163","state":"PUBLISHED","datePublished":"2026-05-06T11:27:41.265Z","dateUpdated":"2026-05-11T22:18:58.873Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.990Z"},"containers":{"cna":{"title":"md/bitmap: fix GPF in write_page caused by resize race","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/bitmap: fix GPF in write_page caused by resize race\n\nA General Protection Fault occurs in write_page() during array resize:\nRIP: 0010:write_page+0x22b/0x3c0 [md_mod]\n\nThis is a use-after-free race between bitmap_daemon_work() and\n__bitmap_resize(). The daemon iterates over `bitmap->storage.filemap`\nwithout locking, while the resize path frees that storage via\nmd_bitmap_file_unmap(). `quiesce()` does not stop the md thread,\nallowing concurrent access to freed pages.\n\nFix by holding `mddev->bitmap_info.mutex` during the bitmap update."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"140cc839fbeb1ddb33a8da8811b716d88d3905b7","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"d3af62411e19752c663fe4f424dbf49d95a4cc7c","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"d92b8fac294b5f915c50e65ce4ae2262e53614ec","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"a437e3bf30e32846079e470c1ba5ee790bccdf89","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"5f73c8b33df9a605a591eab72d43a969600c1f8c","versionType":"git"},{"version":"d60b479d177a5735b6b4db6ee5280ef6653f50e7","status":"affected","lessThan":"46ef85f854dfa9d5226b3c1c46493d79556c9589","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md-bitmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.5","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md-bitmap.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7"},{"url":"https://git.kernel.org/stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8"},{"url":"https://git.kernel.org/stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7c"},{"url":"https://git.kernel.org/stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ec"},{"url":"https://git.kernel.org/stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89"},{"url":"https://git.kernel.org/stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f"},{"url":"https://git.kernel.org/stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8c"},{"url":"https://git.kernel.org/stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:18:58.873Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"5.10.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}