CVE-2026-72482
CVE CVE-2026-72482EUVD EUVD-2026-59381Published 2026-08-15T05:57:20.000ZLast changed 2026-08-17T05:44:45.000ZCVSS 7.8
What the advisory describes
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().
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 6.18.22 <6.18.40; patch: 7.2; d1857f8296dceb75d00ab857fc3c61bc00c7f5c6 <c4faab452b3c1ada003d49c477609dd80523b9bf; 7.0; patch: 0; patch: 6.18.40; 6.19.12 <6.20; cae26eff1b56d78bed7873cf3e60a2b1bdd4da6c <fdee9f207a48ce204ec6cfceaa1459d2473600a5; patch: 7.1.5; d1857f8296dceb75d00ab857fc3c61bc00c7f5c6 <8b5f1d295dda8677e4545ce340053fcfa8b634c7; 28c75dd143ead62e0dfac564c79d251e21d5d74b
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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