{"id":"CVE-2026-53272","summary":"erofs: fix use-after-free on sbi-\u003esync_decompress","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix use-after-free on sbi-\u003esync_decompress\n\nz_erofs_decompress_kickoff() can race with filesystem unmount, causing\na use-after-free on sbi-\u003esync_decompress.\n\nWhen I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()\nto queue z_erofs_decompressqueue_work() asynchronously. Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi-\u003esync_decompress.\n\nThread (unmount)        I/O completion        kworker\n                        queue_work\n                                              z_erofs_decompressqueue_work\n                                               (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n  erofs_sb_free\n   kfree(sbi)\n                        access sbi-\u003esync_decompress  // UAF!!","modified":"2026-06-27T12:02:21.151915947Z","published":"2026-06-25T08:39:57.147Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53272.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53272.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53272"},{"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":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4"},{"fixed":"86ab00cf81d44b675bb23db62b88fd76c8ac8cea"},{"fixed":"00bf6868df65fa95b3854996246d15759fdc7070"},{"fixed":"95caf60da33d87ed26c28993620f0d92487b0296"},{"fixed":"1aee05e814d292064bf5fa15733741040cdc48ba"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53272.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.17.0"},{"fixed":"6.12.94"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53272.json"}}],"schema_version":"1.7.5"}