In the Linux kernel, the following vulnerability has been resolved:
isofs: validate block number from NFS file handle in isofs_export_iget
isofs_fh_to_dentry() and isofs_fh_to_parent() pass an attacker-
controlled block number (ifid->block or ifid->parent_block) from
the NFS file handle to isofs_export_iget(), which only rejects
block == 0 before calling isofs_iget() and ultimately sb_bread().
A crafted file handle with fh_len sufficient to pass the check
added by commit 0405d4b63d08 ("isofs: Prevent the use of too small
fid") can still drive the server to read any in-range block on the
backing device as if it were an iso_directory_record. That earlier
fix was assigned CVE-2025-37780.
sb_bread() on an out-of-range block returns NULL cleanly via the
EIO path, so there is no memory-safety violation. For in-range
reads of adjacent-partition data on the same block device, the
unrelated bytes end up in iso_inode_info fields that reach the NFS
client as dentry metadata. The deployment surface (isofs exported
over NFS from loop-mounted images) is narrow and requires an
authenticated NFS peer, but the malformed-file-handle class is
reportable as hardening next to the existing CVE-2025-37780 fix.
Reject block >= ISOFS_SB(sb)->s_nzones in isofs_export_iget() so
the check covers both isofs_fh_to_dentry() and isofs_fh_to_parent()
call sites with a single line.
References
Configurations
Configuration 1 (hide)
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History
24 Jun 2026, 16:51
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/0a1af74ae2177bda3aee0837a0546309aa539d0d - Patch | |
| References | () https://git.kernel.org/stable/c/24376458138387fb251e782e624c7776e9826796 - Patch | |
| References | () https://git.kernel.org/stable/c/31dbb4ba0f719ae7774e4c0c95172c9bf81692f5 - Patch | |
| References | () https://git.kernel.org/stable/c/4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6 - Patch | |
| References | () https://git.kernel.org/stable/c/908a76f0b1038035e6ebb4f2293ce079f92e0a02 - Patch | |
| References | () https://git.kernel.org/stable/c/afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b - Patch | |
| References | () https://git.kernel.org/stable/c/bb0988ed4f2e26d59bbb58f644cb3a55b7521e21 - Patch | |
| References | () https://git.kernel.org/stable/c/ee0024f5a7e3c73aa253869fae9650ae054093ca - Patch | |
| CWE | NVD-CWE-noinfo |
01 Jun 2026, 17:17
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
30 May 2026, 11:17
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
28 May 2026, 10:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-28 10:16
Updated : 2026-06-24 16:51
NVD link : CVE-2026-46124
Mitre link : CVE-2026-46124
CVE.ORG link : CVE-2026-46124
JSON object : View
Products Affected
linux
- linux_kernel
CWE