In the Linux kernel, the following vulnerability has been resolved:
isofs: Prevent the use of too small fid
syzbot reported a slab-out-of-bounds Read in isofs_fh_to_parent. [1]
The handle_bytes value passed in by the reproducing program is equal to 12.
In handle_to_path(), only 12 bytes of memory are allocated for the structure
file_handle->f_handle member, which causes an out-of-bounds access when
accessing the member parent_block of the structure isofs_fid in isofs,
because accessing parent_block requires at least 16 bytes of f_handle.
Here, fh_len is used to indirectly confirm that the value of handle_bytes
is greater than 3 before accessing parent_block.
[1]
BUG: KASAN: slab-out-of-bounds in isofs_fh_to_parent+0x1b8/0x210 fs/isofs/export.c:183
Read of size 4 at addr ffff0000cc030d94 by task syz-executor215/6466
CPU: 1 UID: 0 PID: 6466 Comm: syz-executor215 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0x198/0x550 mm/kasan/report.c:521
kasan_report+0xd8/0x138 mm/kasan/report.c:634
__asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380
isofs_fh_to_parent+0x1b8/0x210 fs/isofs/export.c:183
exportfs_decode_fh_raw+0x2dc/0x608 fs/exportfs/expfs.c:523
do_handle_to_path+0xa0/0x198 fs/fhandle.c:257
handle_to_path fs/fhandle.c:385 [inline]
do_handle_open+0x8cc/0xb8c fs/fhandle.c:403
__do_sys_open_by_handle_at fs/fhandle.c:443 [inline]
__se_sys_open_by_handle_at fs/fhandle.c:434 [inline]
__arm64_sys_open_by_handle_at+0x80/0x94 fs/fhandle.c:434
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Allocated by task 6466:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x40/0x78 mm/kasan/common.c:68
kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:562
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x32c/0x54c mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
handle_to_path fs/fhandle.c:357 [inline]
do_handle_open+0x5a4/0xb8c fs/fhandle.c:403
__do_sys_open_by_handle_at fs/fhandle.c:443 [inline]
__se_sys_open_by_handle_at fs/fhandle.c:434 [inline]
__arm64_sys_open_by_handle_at+0x80/0x94 fs/fhandle.c:434
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
References
Configurations
Configuration 1 (hide)
|
Configuration 2 (hide)
|
History
06 Nov 2025, 19:11
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-125 | |
| First Time |
Linux
Debian Debian debian Linux Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/007124c896e7d4614ac1f6bd4dedb975c35a2a8e - Patch | |
| References | () https://git.kernel.org/stable/c/0405d4b63d082861f4eaff9d39c78ee9dc34f845 - Patch | |
| References | () https://git.kernel.org/stable/c/0fdafdaef796816a9ed0fd7ac812932d569d9beb - Patch | |
| References | () https://git.kernel.org/stable/c/56dfffea9fd3be0b3795a9ca6401e133a8427e0b - Patch | |
| References | () https://git.kernel.org/stable/c/5e7de55602c61c8ff28db075cc49c8dd6989d7e0 - Patch | |
| References | () https://git.kernel.org/stable/c/63d5a3e207bf315a32c7d16de6c89753a759f95a - Patch | |
| References | () https://git.kernel.org/stable/c/952e7a7e317f126d0a2b879fc531b716932d5ffa - Patch | |
| References | () https://git.kernel.org/stable/c/ee01a309ebf598be1ff8174901ed6e91619f1749 - Patch | |
| References | () https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html - Mailing List, Third Party Advisory | |
| References | () https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html - Mailing List, Third Party Advisory | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| CPE | cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* |
03 Nov 2025, 20:18
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
02 May 2025, 13:53
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
|
02 May 2025, 07:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
01 May 2025, 14:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-05-01 14:15
Updated : 2025-11-06 19:11
NVD link : CVE-2025-37780
Mitre link : CVE-2025-37780
CVE.ORG link : CVE-2025-37780
JSON object : View
Products Affected
debian
- debian_linux
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read