{"id":"CVE-2023-53537","summary":"f2fs: fix to avoid use-after-free for cached IPU bio","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid use-after-free for cached IPU bio\n\nxfstest generic/019 reports a bug:\n\nkernel BUG at mm/filemap.c:1619!\nRIP: 0010:folio_end_writeback+0x8a/0x90\nCall Trace:\n end_page_writeback+0x1c/0x60\n f2fs_write_end_io+0x199/0x420\n bio_endio+0x104/0x180\n submit_bio_noacct+0xa5/0x510\n submit_bio+0x48/0x80\n f2fs_submit_write_bio+0x35/0x300\n f2fs_submit_merged_ipu_write+0x2a0/0x2b0\n f2fs_write_single_data_page+0x838/0x8b0\n f2fs_write_cache_pages+0x379/0xa30\n f2fs_write_data_pages+0x30c/0x340\n do_writepages+0xd8/0x1b0\n __writeback_single_inode+0x44/0x370\n writeback_sb_inodes+0x233/0x4d0\n __writeback_inodes_wb+0x56/0xf0\n wb_writeback+0x1dd/0x2d0\n wb_workfn+0x367/0x4a0\n process_one_work+0x21d/0x430\n worker_thread+0x4e/0x3c0\n kthread+0x103/0x130\n ret_from_fork+0x2c/0x50\n\nThe root cause is: after cp_error is set, f2fs_submit_merged_ipu_write()\nin f2fs_write_single_data_page() tries to flush IPU bio in cache, however\nf2fs_submit_merged_ipu_write() missed to check validity of @bio parameter,\nresult in submitting random cached bio which belong to other IO context,\nthen it will cause use-after-free issue, fix it by adding additional\nvalidity check.","modified":"2026-04-02T09:44:24.839951Z","published":"2025-10-04T15:16:48.006Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53537.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5cdb422c839134273866208dad5360835ddb9794"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d058f0ab161437369ad6e45a4b67c2886e71373"},{"type":"WEB","url":"https://git.kernel.org/stable/c/97ec6f1788cc6bee3f8c89cb908e1a2a1cd859bb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a7f63283af6befc0f91d549f4f6917dff7479a9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af4ce124d7bd74cb839bbdaccffbb416771a56b5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b2f423fda64fb49213aa0ed5056079cf295a5df2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53537.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53537"},{"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":"0b20fcec8651569935a10afe03fedc0b812d044e"},{"fixed":"b2f423fda64fb49213aa0ed5056079cf295a5df2"},{"fixed":"9a7f63283af6befc0f91d549f4f6917dff7479a9"},{"fixed":"7d058f0ab161437369ad6e45a4b67c2886e71373"},{"fixed":"97ec6f1788cc6bee3f8c89cb908e1a2a1cd859bb"},{"fixed":"af4ce124d7bd74cb839bbdaccffbb416771a56b5"},{"fixed":"5cdb422c839134273866208dad5360835ddb9794"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53537.json"}}],"schema_version":"1.7.5"}