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CVE-2026-46124: Linux, грешка в паметта

7.5

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

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.

Засегнати продукти

  • Linux Linux: 5e7de55602c61c8ff28db075cc49c8dd6989d7e0 преди ee0024f5a7e3c73aa253869fae9650ae054093ca; 63d5a3e207bf315a32c7d16de6c89753a759f95a преди 31dbb4ba0f719ae7774e4c0c95172c9bf81692f5; 0fdafdaef796816a9ed0fd7ac812932d569d9beb преди 908a76f0b1038035e6ebb4f2293ce079f92e0a02; 952e7a7e317f126d0a2b879fc531b716932d5ffa преди bb0988ed4f2e26d59bbb58f644cb3a55b7521e21; 56dfffea9fd3be0b3795a9ca6401e133a8427e0b преди 0a1af74ae2177bda3aee0837a0546309aa539d0d; 0405d4b63d082861f4eaff9d39c78ee9dc34f845 преди afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b; 0405d4b63d082861f4eaff9d39c78ee9dc34f845 преди 4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6; 0405d4b63d082861f4eaff9d39c78ee9dc34f845 преди 24376458138387fb251e782e624c7776e9826796; ee01a309ebf598be1ff8174901ed6e91619f1749; 007124c896e7d4614ac1f6bd4dedb975c35a2a8e; 5.10.237 преди 5.10.258; 5.15.181 преди 5.15.209; 6.1.135 преди 6.1.175; 6.6.88 преди 6.6.140; 6.12.25 преди 6.12.88; 5.4.293 преди 5.5; 6.14.4 преди 6.15
  • Linux Linux: 6.15; преди 6.15; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.88 до 6.12.*; 6.18.30 до 6.18.*; 7.0.7 до 7.0.*; 7.1 до *
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: преди *

Вид слабост

История

  • 28 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-46124: Linux, грешка в паметта | freedomonline.bg