CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: gpib: fix double decrement of descriptor_busy in command_ioctl() commit d1857f8296dc ("gpib: fix use-after-free in IO ioctl handlers") introduced a descriptor_busy reference counter to pin struct gpib_descriptor across IO ioctl operations. In command_ioctl(), the error path inside the loop decrements descriptor_busy and breaks, but execution then falls through to the unconditional decrement after the loop, underflowing the counter to -1. This re-enables the use-after-free that the original fix was meant to prevent: a concurrent close_dev_ioctl() sees descriptor_busy == 0 on an actively-used descriptor and frees it. Remove the early decrement from the error path. The post-loop decrement already handles all exit paths, matching the correct pattern used in read_ioctl() and write_ioctl().
Засегнати продукти
- Linux Linux: cae26eff1b56d78bed7873cf3e60a2b1bdd4da6c преди fdee9f207a48ce204ec6cfceaa1459d2473600a5; d1857f8296dceb75d00ab857fc3c61bc00c7f5c6 преди 8b5f1d295dda8677e4545ce340053fcfa8b634c7; d1857f8296dceb75d00ab857fc3c61bc00c7f5c6 преди c4faab452b3c1ada003d49c477609dd80523b9bf; 28c75dd143ead62e0dfac564c79d251e21d5d74b; 6.18.22 преди 6.18.40; 6.19.12 преди 6.20
- Linux Linux: 7.0; преди 7.0; 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
- https://www.cve.org/CVERecord?id=CVE-2026-72482
- https://nvd.nist.gov/vuln/detail/CVE-2026-72482
- https://git.kernel.org/stable/c/fdee9f207a48ce204ec6cfceaa1459d2473600a5
- https://git.kernel.org/stable/c/8b5f1d295dda8677e4545ce340053fcfa8b634c7
- https://git.kernel.org/stable/c/c4faab452b3c1ada003d49c477609dd80523b9bf