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CVE-2026-64232: Linux, състезание за ресурс

9.8

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: block: recompute nr_integrity_segments in blk_insert_cloned_request blk_insert_cloned_request() already recomputes nr_phys_segments against the bottom queue, because "the queue settings related to segment counting may differ from the original queue." The exact same reasoning applies to integrity segments: a stacked driver's underlying queue can have tighter virt_boundary_mask, seg_boundary_mask, or max_segment_size than the top queue, in which case blk_rq_count_integrity_sg() against the bottom queue produces a different count than the cached rq->nr_integrity_segments inherited from the source request by blk_rq_prep_clone(). When the cached count is lower than the bottom queue's actual count, blk_rq_map_integrity_sg() trips BUG_ON(segments > rq->nr_integrity_segments); on dispatch. The same families of stacked setups that motivated the existing nr_phys_segments recompute -- dm-multipath fanning out to nvme-rdma in particular -- can produce this. Mirror the nr_phys_segments handling: when the request carries integrity, recompute nr_integrity_segments against the bottom queue and reject the request if it exceeds the bottom queue's max_integrity_segments. blk_rq_count_integrity_sg() and queue_max_integrity_segments() are both already available via <linux/blk-integrity.h>, which blk-mq.c includes. This closes a latent gap in the stacking contract and brings the integrity-segment accounting in line with the existing phys-segment accounting.

Засегнати продукти

  • Linux Linux: 76c313f658d2752e8527610677164aa7094ef7a5 преди 53a01bcc0242590eda4c452a5bd996f62457113b; 76c313f658d2752e8527610677164aa7094ef7a5 преди 0943f81e1b3176f27dbaf6db268fc69d8a94f0ba; 76c313f658d2752e8527610677164aa7094ef7a5 преди 42929c98d044f126508baf54a65b0f87f932fa75; 76c313f658d2752e8527610677164aa7094ef7a5 преди 2c6e6a18a37b905cb584eb0dda3ae482162a81ca
  • Linux Linux: 6.12; преди 6.12; 6.12.92 до 6.12.*; 6.18.34 до 6.18.*; 7.0.11 до 7.0.*; от 7.1 нататък

Вид слабост

История

  • 24 юли 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-64232: Linux, състезание за ресурс | freedomonline.bg