{"id":"DEBIAN-CVE-2023-53537","details":"In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid use-after-free for cached IPU bio  xfstest generic/019 reports a bug:  kernel BUG at mm/filemap.c:1619! RIP: 0010:folio_end_writeback+0x8a/0x90 Call Trace:  end_page_writeback+0x1c/0x60  f2fs_write_end_io+0x199/0x420  bio_endio+0x104/0x180  submit_bio_noacct+0xa5/0x510  submit_bio+0x48/0x80  f2fs_submit_write_bio+0x35/0x300  f2fs_submit_merged_ipu_write+0x2a0/0x2b0  f2fs_write_single_data_page+0x838/0x8b0  f2fs_write_cache_pages+0x379/0xa30  f2fs_write_data_pages+0x30c/0x340  do_writepages+0xd8/0x1b0  __writeback_single_inode+0x44/0x370  writeback_sb_inodes+0x233/0x4d0  __writeback_inodes_wb+0x56/0xf0  wb_writeback+0x1dd/0x2d0  wb_workfn+0x367/0x4a0  process_one_work+0x21d/0x430  worker_thread+0x4e/0x3c0  kthread+0x103/0x130  ret_from_fork+0x2c/0x50  The root cause is: after cp_error is set, f2fs_submit_merged_ipu_write() in f2fs_write_single_data_page() tries to flush IPU bio in cache, however f2fs_submit_merged_ipu_write() missed to check validity of @bio parameter, result in submitting random cached bio which belong to other IO context, then it will cause use-after-free issue, fix it by adding additional validity check.","modified":"2026-09-15T09:02:45.641857959Z","published":"2025-10-04T16:15:48.697Z","upstream":["CVE-2023-53537"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53537"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.37-1"}]}],"versions":["6.1.27-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53537.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53537.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53537.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}