{"id":"CVE-2026-98388","published":"2026-10-14T14:17:49.617","lastModified":"2026-10-14T14:17:49.617","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nexec: do_close_on_exec() before taking exec_update_lock\n\ndo_close_on_exec() currently happens while holding the exec_update_lock,\nwhich is used in a lot of places that access process state to\nsynchronize access checks.\nI recently added another such use of exec_update_lock, causing a\nregression.\n\ndo_close_on_exec() can block waiting for a reply from a filesystem.\nThat means a hung filesystem can block codepaths that use\nexec_update_lock; and it also means that a FUSE filesystem which\nattempts to inspect the calling process can deadlock.\n\nTo avoid such problems, move do_close_on_exec() before the\nexec_update_lock is taken, but after the FD table has been copied if\nnecessary.\n\nI have looked through all the calls between the old and new position of\nthe do_close_on_exec() call; there seems to be no file descriptor table\naccess in between.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53","tags":[]},{"url":"https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da","tags":[]},{"url":"https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d","tags":[]},{"url":"https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8","tags":[]},{"url":"https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38","tags":[]},{"url":"https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928","tags":[]},{"url":"https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1","tags":[]},{"url":"https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}