# CVE-2025-38716: hfs: fix general protection fault in hfs_find_init()

CVE-2025-38716 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-38716, released September 4, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-38716
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 4, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38716

## Description

In the Linux kernel, the following vulnerability has been resolved:  hfs: fix general protection fault in hfs_find_init()  The hfs_find_init() method can trigger the crash if tree pointer is NULL:  [   45.746290][ T9787] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] SMP KAI [   45.747287][ T9787] KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] [   45.748716][ T9787] CPU: 2 UID: 0 PID: 9787 Comm: repro Not tainted 6.16.0-rc3 #10 PREEMPT(full) [   45.750250][ T9787] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [   45.751983][ T9787] RIP: 0010:hfs_find_init+0x86/0x230 [   45.752834][ T9787] Code: c1 ea 03 80 3c 02 00 0f 85 9a 01 00 00 4c 8d 6b 40 48 c7 45 18 00 00 00 00 48 b8 00 00 00 00 00 fc [   45.755574][ T9787] RSP: 0018:ffffc90015157668 EFLAGS: 00010202 [   45.756432][ T9787] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff819a4d09 [   45.757457][ T9787] RDX: 0000000000000008 RSI: ffffffff819acd3a RDI: ffffc900151576e8 [   45.758282][ T9787] RBP: ffffc900151576d0 R08: 0000000000000005 R09: 0000000000000000 [   45.758943][ T9787] R10: 0000000080000000 R11: 0000000000000001 R12: 0000000000000004 [   45.759619][ T9787] R13: 0000000000000040 R14: ffff88802c50814a R15: 0000000000000000 [   45.760293][ T9787] FS:  00007ffb72734540(0000) GS:ffff8880cec64000(0000) knlGS:0000000000000000 [   45.761050][ T9787] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [   45.761606][ T9787] CR2: 00007f9bd8225000 CR3: 000000010979a000 CR4: 00000000000006f0 [   45.762286][ T9787] Call Trace: [   45.762570][ T9787]  <TASK> [   45.762824][ T9787]  hfs_ext_read_extent+0x190/0x9d0 [   45.763269][ T9787]  ? submit_bio_noacct_nocheck+0x2dd/0xce0 [   45.763766][ T9787]  ? __pfx_hfs_ext_read_extent+0x10/0x10 [   45.764250][ T9787]  hfs_get_block+0x55f/0x830 [   45.764646][ T9787]  block_read_full_folio+0x36d/0x850 [   45.765105][ T9787]  ? __pfx_hfs_get_block+0x10/0x10 [   45.765541][ T9787]  ? const_folio_flags+0x5b/0x100 [   45.765972][ T9787]  ? __pfx_hfs_read_folio+0x10/0x10 [   45.766415][ T9787]  filemap_read_folio+0xbe/0x290 [   45.766840][ T9787]  ? __pfx_filemap_read_folio+0x10/0x10 [   45.767325][ T9787]  ? __filemap_get_folio+0x32b/0xbf0 [   45.767780][ T9787]  do_read_cache_folio+0x263/0x5c0 [   45.768223][ T9787]  ? __pfx_hfs_read_folio+0x10/0x10 [   45.768666][ T9787]  read_cache_page+0x5b/0x160 [   45.769070][ T9787]  hfs_btree_open+0x491/0x1740 [   45.769481][ T9787]  hfs_mdb_get+0x15e2/0x1fb0 [   45.769877][ T9787]  ? __pfx_hfs_mdb_get+0x10/0x10 [   45.770316][ T9787]  ? find_held_lock+0x2b/0x80 [   45.770731][ T9787]  ? lockdep_init_map_type+0x5c/0x280 [   45.771200][ T9787]  ? lockdep_init_map_type+0x5c/0x280 [   45.771674][ T9787]  hfs_fill_super+0x38e/0x720 [   45.772092][ T9787]  ? __pfx_hfs_fill_super+0x10/0x10 [   45.772549][ T9787]  ? snprintf+0xbe/0x100 [   45.772931][ T9787]  ? __pfx_snprintf+0x10/0x10 [   45.773350][ T9787]  ? do_raw_spin_lock+0x129/0x2b0 [   45.773796][ T9787]  ? find_held_lock+0x2b/0x80 [   45.774215][ T9787]  ? set_blocksize+0x40a/0x510 [   45.774636][ T9787]  ? sb_set_blocksize+0x176/0x1d0 [   45.775087][ T9787]  ? setup_bdev_super+0x369/0x730 [   45.775533][ T9787]  get_tree_bdev_flags+0x384/0x620 [   45.775985][ T9787]  ? __pfx_hfs_fill_super+0x10/0x10 [   45.776453][ T9787]  ? __pfx_get_tree_bdev_flags+0x10/0x10 [   45.776950][ T9787]  ? bpf_lsm_capable+0x9/0x10 [   45.777365][ T9787]  ? security_capable+0x80/0x260 [   45.777803][ T9787]  vfs_get_tree+0x8e/0x340 [   45.778203][ T9787]  path_mount+0x13de/0x2010 [   45.778604][ T9787]  ? kmem_cache_free+0x2b0/0x4c0 [   45.779052][ T9787]  ? __pfx_path_mount+0x10/0x10 [   45.779480][ T9787]  ? getname_flags.part.0+0x1c5/0x550 [   45.779954][ T9787]  ? putname+0x154/0x1a0 [   45.780335][ T9787]  __x64_sys_mount+0x27b/0x300 [   45.780758][ T9787]  ? __pfx___x64_sys_mount+0x10/0x10 [   45.781232][ T9787]  ---truncated---

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.43-1 | [DEBIAN-CVE-2025-38716](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38716.md) | Sep 4, 2025 |
| Linux | linux Debian 14 | 6.16.3-1 | [DEBIAN-CVE-2025-38716](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38716.md) | Sep 4, 2025 |

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