{"id":"CVE-2026-43163","summary":"md/bitmap: fix GPF in write_page caused by resize race","details":"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-\u003estorage.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-\u003ebitmap_info.mutex` during the bitmap update.","modified":"2026-05-18T06:00:12.802013251Z","published":"2026-05-06T11:27:41.265Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43163.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43163.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43163"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d60b479d177a5735b6b4db6ee5280ef6653f50e7"},{"fixed":"140cc839fbeb1ddb33a8da8811b716d88d3905b7"},{"fixed":"ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8"},{"fixed":"d3af62411e19752c663fe4f424dbf49d95a4cc7c"},{"fixed":"d92b8fac294b5f915c50e65ce4ae2262e53614ec"},{"fixed":"a437e3bf30e32846079e470c1ba5ee790bccdf89"},{"fixed":"9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f"},{"fixed":"5f73c8b33df9a605a591eab72d43a969600c1f8c"},{"fixed":"46ef85f854dfa9d5226b3c1c46493d79556c9589"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43163.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.5.0"},{"fixed":"5.10.252"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.202"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.165"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43163.json"}}],"schema_version":"1.7.5"}