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CVE-2026-72125: Linux

7.8

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 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: isotp: fix use-after-free race with concurrent NETDEV_UNREGISTER isotp_release() looked up the bound network device via dev_get_by_index() using the stored ifindex. During device unregistration the device is unlisted from the ifindex hash before the NETDEV_UNREGISTER notifier chain runs, so a concurrent isotp_release() could find no device, skip can_rx_unregister() entirely, and still proceed to free the socket. Since isotp_release() had already removed itself from the isotp notifier list at that point, isotp_notify() would never get a chance to clean up either, leaving a stale CAN filter that keeps pointing at the freed socket. Fix this the same way raw.c already does: hold a tracked reference to the bound net_device in the socket (so->dev/so->dev_tracker) from bind() onward instead of re-resolving it from the ifindex, and serialize bind()/release() with rtnl_lock() so that so->dev is always consistent with what the NETDEV_UNREGISTER notifier sees. so->dev stays valid regardless of ifindex-hash unlisting, and is only ever cleared by whichever of isotp_release()/isotp_notify() gets there first, so the filter is always removed exactly once. isotp_bind() now rejects a (re)bind with -EAGAIN while so->[tx|rx].state isn't ISOTP_IDLE yet, so a timer left running by a prior NETDEV_UNREGISTER can't act on a newly bound so->ifindex. Both checks share the same lock_sock() section, so there is no window in which a concurrent isotp_notify() clearing so->bound could be missed.

Засегнати продукти

  • Linux Linux: e057dd3fc20ffb3d7f150af46542a51b59b90127 преди f311bbb29bb06aaab69ba45a6e4b11323d20b8f9; e057dd3fc20ffb3d7f150af46542a51b59b90127 преди 8e018f4335590460ebcf0c2b493ed38ba1a35204; e057dd3fc20ffb3d7f150af46542a51b59b90127 преди 33b9cd9245e2a4b800f99ed1cc53d64960614152; e057dd3fc20ffb3d7f150af46542a51b59b90127 преди 0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96; e057dd3fc20ffb3d7f150af46542a51b59b90127 преди 43884dc7963beef2328f507f4fe680bdc173eb80; e057dd3fc20ffb3d7f150af46542a51b59b90127 преди 7bef39ba76eb7307ed22a50329e0f5776dbeda58; e057dd3fc20ffb3d7f150af46542a51b59b90127 преди e442b62ba5a7756c17e05a77b32cdd085a2b6138; e057dd3fc20ffb3d7f150af46542a51b59b90127 преди 20bab8b88baac140ca3701116e1d486c7f51e311
  • Linux Linux: 5.10; преди 5.10; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.148 до 6.6.*; 6.12.101 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-2026-72125: Linux | freedomonline.bg