{"id":"DEBIAN-CVE-2022-50747","details":"In the Linux kernel, the following vulnerability has been resolved:  hfs: Fix OOB Write in hfs_asc2mac  Syzbot reported a OOB Write bug:  loop0: detected capacity change from 0 to 64 ================================================================== BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x467/0x9a0 fs/hfs/trans.c:133 Write of size 1 at addr ffff88801848314e by task syz-executor391/3632  Call Trace:  \u003cTASK\u003e  __dump_stack lib/dump_stack.c:88 [inline]  dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106  print_address_description+0x74/0x340 mm/kasan/report.c:284  print_report+0x107/0x1f0 mm/kasan/report.c:395  kasan_report+0xcd/0x100 mm/kasan/report.c:495  hfs_asc2mac+0x467/0x9a0 fs/hfs/trans.c:133  hfs_cat_build_key+0x92/0x170 fs/hfs/catalog.c:28  hfs_lookup+0x1ab/0x2c0 fs/hfs/dir.c:31  lookup_open fs/namei.c:3391 [inline]  open_last_lookups fs/namei.c:3481 [inline]  path_openat+0x10e6/0x2df0 fs/namei.c:3710  do_filp_open+0x264/0x4f0 fs/namei.c:3740  If in-\u003elen is much larger than HFS_NAMELEN(31) which is the maximum length of an HFS filename, a OOB write could occur in hfs_asc2mac(). In that case, when the dst reaches the boundary, the srclen is still greater than 0, which causes a OOB write. Fix this by adding a check on dstlen in while() before writing to dst address.","modified":"2026-09-01T16:05:36.217568162Z","published":"2025-12-24T13:16:01.410Z","upstream":["CVE-2022-50747"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50747"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50747.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50747.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50747.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"}]}