{"id":"DEBIAN-CVE-2025-40088","details":"In the Linux kernel, the following vulnerability has been resolved:  hfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()  The hfsplus_strcasecmp() logic can trigger the issue:  [  117.317703][ T9855] ================================================================== [  117.318353][ T9855] BUG: KASAN: slab-out-of-bounds in hfsplus_strcasecmp+0x1bc/0x490 [  117.318991][ T9855] Read of size 2 at addr ffff88802160f40c by task repro/9855 [  117.319577][ T9855] [  117.319773][ T9855] CPU: 0 UID: 0 PID: 9855 Comm: repro Not tainted 6.17.0-rc6 #33 PREEMPT(full) [  117.319780][ T9855] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [  117.319783][ T9855] Call Trace: [  117.319785][ T9855]  \u003cTASK\u003e [  117.319788][ T9855]  dump_stack_lvl+0x1c1/0x2a0 [  117.319795][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0 [  117.319803][ T9855]  ? __pfx_dump_stack_lvl+0x10/0x10 [  117.319808][ T9855]  ? rcu_is_watching+0x15/0xb0 [  117.319816][ T9855]  ? lock_release+0x4b/0x3e0 [  117.319821][ T9855]  ? __kasan_check_byte+0x12/0x40 [  117.319828][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0 [  117.319835][ T9855]  ? __virt_addr_valid+0x4a5/0x5c0 [  117.319842][ T9855]  print_report+0x17e/0x7e0 [  117.319848][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0 [  117.319855][ T9855]  ? __virt_addr_valid+0x4a5/0x5c0 [  117.319862][ T9855]  ? __phys_addr+0xd3/0x180 [  117.319869][ T9855]  ? hfsplus_strcasecmp+0x1bc/0x490 [  117.319876][ T9855]  kasan_report+0x147/0x180 [  117.319882][ T9855]  ? hfsplus_strcasecmp+0x1bc/0x490 [  117.319891][ T9855]  hfsplus_strcasecmp+0x1bc/0x490 [  117.319900][ T9855]  ? __pfx_hfsplus_cat_case_cmp_key+0x10/0x10 [  117.319906][ T9855]  hfs_find_rec_by_key+0xa9/0x1e0 [  117.319913][ T9855]  __hfsplus_brec_find+0x18e/0x470 [  117.319920][ T9855]  ? __pfx_hfsplus_bnode_find+0x10/0x10 [  117.319926][ T9855]  ? __pfx_hfs_find_rec_by_key+0x10/0x10 [  117.319933][ T9855]  ? __pfx___hfsplus_brec_find+0x10/0x10 [  117.319942][ T9855]  hfsplus_brec_find+0x28f/0x510 [  117.319949][ T9855]  ? __pfx_hfs_find_rec_by_key+0x10/0x10 [  117.319956][ T9855]  ? __pfx_hfsplus_brec_find+0x10/0x10 [  117.319963][ T9855]  ? __kmalloc_noprof+0x2a9/0x510 [  117.319969][ T9855]  ? hfsplus_find_init+0x8c/0x1d0 [  117.319976][ T9855]  hfsplus_brec_read+0x2b/0x120 [  117.319983][ T9855]  hfsplus_lookup+0x2aa/0x890 [  117.319990][ T9855]  ? __pfx_hfsplus_lookup+0x10/0x10 [  117.320003][ T9855]  ? d_alloc_parallel+0x2f0/0x15e0 [  117.320008][ T9855]  ? __lock_acquire+0xaec/0xd80 [  117.320013][ T9855]  ? __pfx_d_alloc_parallel+0x10/0x10 [  117.320019][ T9855]  ? __raw_spin_lock_init+0x45/0x100 [  117.320026][ T9855]  ? __init_waitqueue_head+0xa9/0x150 [  117.320034][ T9855]  __lookup_slow+0x297/0x3d0 [  117.320039][ T9855]  ? __pfx___lookup_slow+0x10/0x10 [  117.320045][ T9855]  ? down_read+0x1ad/0x2e0 [  117.320055][ T9855]  lookup_slow+0x53/0x70 [  117.320065][ T9855]  walk_component+0x2f0/0x430 [  117.320073][ T9855]  path_lookupat+0x169/0x440 [  117.320081][ T9855]  filename_lookup+0x212/0x590 [  117.320089][ T9855]  ? __pfx_filename_lookup+0x10/0x10 [  117.320098][ T9855]  ? strncpy_from_user+0x150/0x290 [  117.320105][ T9855]  ? getname_flags+0x1e5/0x540 [  117.320112][ T9855]  user_path_at+0x3a/0x60 [  117.320117][ T9855]  __x64_sys_umount+0xee/0x160 [  117.320123][ T9855]  ? __pfx___x64_sys_umount+0x10/0x10 [  117.320129][ T9855]  ? do_syscall_64+0xb7/0x3a0 [  117.320135][ T9855]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [  117.320141][ T9855]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [  117.320145][ T9855]  do_syscall_64+0xf3/0x3a0 [  117.320150][ T9855]  ? exc_page_fault+0x9f/0xf0 [  117.320154][ T9855]  entry_SYSCALL_64_after_hwframe+0x77/0x7f [  117.320158][ T9855] RIP: 0033:0x7f7dd7908b07 [  117.320163][ T9855] Code: 23 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 08 [  117.320167][ T9855] RSP: 002b:00007ffd5ebd9698 EFLAGS: 00000202  ---truncated---","modified":"2026-09-01T16:06:16.740329449Z","published":"2025-10-30T10:15:33.343Z","upstream":["CVE-2025-40088"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-40088"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.158-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-40088.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.57-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-40088.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.17.6-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.2-1~exp1","6.17.5-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-40088.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:N/A:H"}]}