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CVE-2026-74365: Linux

7.3

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 локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: nvdimm/btt: Handle preemption in BTT lane acquisition BTT lanes serialize access to per-lane metadata and workspace state during BTT I/O. The btt-check unit test reports data mismatches during BTT writes due to a race in lane acquisition that can lead to silent data corruption. The existing lane model uses a spinlock together with a per-CPU recursion count. That recursion model stopped being valid after BTT lanes became preemptible: another task can run on the same CPU, observe a non-zero recursion count, bypass locking, and use the same lane concurrently. BTT lanes are also held across arena_write_bytes() calls. That path reaches nsio_rw_bytes(), which flushes writes with nvdimm_flush(). Some provider flush callbacks can sleep, making a spinlock the wrong primitive for the lane lifetime. Replace the spinlock-based recursion model with a dynamically allocated per-lane mutex array and take the lane lock unconditionally. Add might_sleep() to catch any future atomic-context caller. Found with the ndctl unit test btt-check.sh.

Засегнати продукти

  • Linux Linux: f23859748e3d530217b197e146a9ac84faf0a282 преди fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735; 6f50b414f1a0d790f11a6438a3ad6d0577eb2c18 преди 73e35c1bdfa160b41fdbe204e02325f0687de506; 36c75ce3bd299878fd9b238e9803d3817ddafbf3 преди 417918783bcfe0be135019df16a267b3af442efd; 36c75ce3bd299878fd9b238e9803d3817ddafbf3 преди 5c53406098b599c420b031e6ec5ba8a2f3794c50; 36c75ce3bd299878fd9b238e9803d3817ddafbf3 преди 4eafa810b042d985ec6bbf5b514414e73cee6f6f; 36c75ce3bd299878fd9b238e9803d3817ddafbf3 преди 8d4b989d9c9afe5f185aa5853b666fc4617afe9e; 2577fece583c7c05cda7ad50dde7638c962665e1; 40ba3fa21250e361bdd8f00800b3e2cb6160de95; b0e7a935739f33ed2bd6868b89f97dd4c2683c26; 66eb7b7f23dd9aec5356e7054dd3596ae7648ff5; b27751fb1f271bbb78d5993c0b10011628e40e18; 6.1.63 преди 6.1.178; 6.6.2 преди 6.6.145; 4.19.299 преди 4.20; 5.4.261 преди 5.5; 5.10.201 преди 5.11; 5.15.139 преди 5.16; 6.5.12 преди 6.6
  • Linux Linux: 6.7; преди 6.7; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74365: Linux | freedomonline.bg