Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5e7de55602c61c8ff28db075cc49c8dd6989d7e0 before ee0024f5a7e3c73aa253869fae9650ae054093ca; affected 63d5a3e207bf315a32c7d16de6c89753a759f95a before 31dbb4ba0f719ae7774e4c0c95172c9bf81692f5; affected 0fdafdaef796816a9ed0fd7ac812932d569d9beb before 908a76f0b1038035e6ebb4f2293ce079f92e0a02; affected 952e7a7e317f126d0a2b879fc531b716932d5ffa before bb0988ed4f2e26d59bbb58f644cb3a55b7521e21; affected 56dfffea9fd3be0b3795a9ca6401e133a8427e0b before 0a1af74ae2177bda3aee0837a0546309aa539d0d; affected 0405d4b63d082861f4eaff9d39c78ee9dc34f845 before afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b; affected 0405d4b63d082861f4eaff9d39c78ee9dc34f845 before 4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6; affected 0405d4b63d082861f4eaff9d39c78ee9dc34f845 before 24376458138387fb251e782e624c7776e9826796; affected ee01a309ebf598be1ff8174901ed6e91619f1749; affected 007124c896e7d4614ac1f6bd4dedb975c35a2a8e; affected 5.10.237 before 5.10.258; affected 5.15.181 before 5.15.209; affected 6.1.135 before 6.1.175; affected 6.6.88 before 6.6.140; affected 6.12.25 before 6.12.88; affected 5.4.293 before 5.5; affected 6.14.4 before 6.15 |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.88 through 6.12.*; unaffected 6.18.30 through 6.18.*; unaffected 7.0.7 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ee0024f5a7e3c73aa253869fae9650ae054093ca
- https://git.kernel.org/stable/c/31dbb4ba0f719ae7774e4c0c95172c9bf81692f5
- https://git.kernel.org/stable/c/908a76f0b1038035e6ebb4f2293ce079f92e0a02
- https://git.kernel.org/stable/c/bb0988ed4f2e26d59bbb58f644cb3a55b7521e21
- https://git.kernel.org/stable/c/0a1af74ae2177bda3aee0837a0546309aa539d0d
- https://git.kernel.org/stable/c/afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b
- https://git.kernel.org/stable/c/4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6
- https://git.kernel.org/stable/c/24376458138387fb251e782e624c7776e9826796
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.