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CVE-2026-72122: 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: can: bcm: fix lockless bound/ifindex race and silent RX_SETUP failure bcm_sendmsg() reads bo->ifindex and checks bo->bound before taking lock_sock(), while bcm_notify(), bcm_connect() and bcm_release() all mutate both fields under that same lock. Because the lockless reads and the locked writes are unordered with respect to each other, a racing bcm_notify() (device unregister) or bcm_connect() (concurrent bind on another thread sharing the socket) can make bcm_sendmsg() observe an inconsistent combination, e.g. a stale bound=1 together with the now-cleared ifindex=0, silently turning a socket bound to a specific CAN interface into one that also matches "any" interface. Keep the lockless bo->bound check purely as a fast-path reject, and move the ifindex read (and a bo->bound re-check) into the locked section, where every writer already serializes. This removes the possibility of observing the two fields torn against each other, rather than trying to fix it with more READ_ONCE()/WRITE_ONCE() pairs on two independently updated fields. Annotate the now-purely-lockless bo->bound accesses consistently across all its write sites. Also fix bcm_rx_setup() silently returning success when the target device disappears concurrently instead of reporting -ENODEV, so a broken RX op is no longer left registered as if it had succeeded.

Засегнати продукти

  • Linux Linux: ffd980f976e7fd666c2e61bf8ab35107efd11828 преди 9e60c586faeaed80d55ab8ce2a4b8e56133bc395; ffd980f976e7fd666c2e61bf8ab35107efd11828 преди ffa80a2af27c97453861a5128e537214a31cd18a; ffd980f976e7fd666c2e61bf8ab35107efd11828 преди 6bcc5cd247c2934373bc2a1cdf8bf12321169543; ffd980f976e7fd666c2e61bf8ab35107efd11828 преди 0f6f9f95294b4cbb26ba02209e893e3bd91237c3; ffd980f976e7fd666c2e61bf8ab35107efd11828 преди b70f1a15533afeeec5d07f20bec3f3867ab1c7b6; ffd980f976e7fd666c2e61bf8ab35107efd11828 преди 35f0ac19efb1a3f6c5e12c00e475a9ec2d9c3a6d; ffd980f976e7fd666c2e61bf8ab35107efd11828 преди b9c6ac6fb4e01b34575816066e5d3890a57b3c86; ffd980f976e7fd666c2e61bf8ab35107efd11828 преди d9b091d9d22fee81ec53fb55d2032951993ceadb
  • Linux Linux: 2.6.25; преди 2.6.25; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 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.*; 7.2 до *

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-72122: Linux | freedomonline.bg