CVE-2026-98388
Description
In the Linux kernel, the following vulnerability has been resolved: exec: do_close_on_exec() before taking exec_update_lock do_close_on_exec() currently happens while holding the exec_update_lock, which is used in a lot of places that access process state to synchronize access checks. I recently added another such use of exec_update_lock, causing a regression. do_close_on_exec() can block waiting for a reply from a filesystem. That means a hung filesystem can block codepaths that use exec_update_lock; and it also means that a FUSE filesystem which attempts to inspect the calling process can deadlock. To avoid such problems, move do_close_on_exec() before the exec_update_lock is taken, but after the FD table has been copied if necessary. I have looked through all the calls between the old and new position of the do_close_on_exec() call; there seems to be no file descriptor table access in between.
How to fix
- Linux Linux955973fff4a36d39a848b00cac1706863f568fe1, 550feab5b01000ab314868b62211fb3ddfd600e8, 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38, 3feb4020bfb7ccf0d347f27051639d25e19cd65d, 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53, 19ddef61ee0a49782a60f8f497e50597ad5de2da, 63be3d8511bdafa095cd14a393cbf3c58dbbb928, e780259b54e618ceb4763fbc21314acf3565e813, 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ae1e630bcaac739f625822078edbaea98366930d ≤ v < 955973fff4a36d39a848b00cac1706863f568fe1, d54f14655fd7d7b293698a8b6918563c4c0465e7 ≤ v < 550feab5b01000ab314868b62211fb3ddfd600e8, bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 ≤ v < 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38, 7456ae990a9738962b33146916fabca62ae3d4e0 ≤ v < 3feb4020bfb7ccf0d347f27051639d25e19cd65d, 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 ≤ v < 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53, f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 ≤ v < 19ddef61ee0a49782a60f8f497e50597ad5de2da, 6650527444dadc63d84aa939d14ecba4fadb2f69 ≤ v < 63be3d8511bdafa095cd14a393cbf3c58dbbb928, 6650527444dadc63d84aa939d14ecba4fadb2f69 ≤ v < e780259b54e618ceb4763fbc21314acf3565e813, c1cfd63326f5d09999134e9052c353faf738286e, 5.10.261 ≤ v < 5.10.271, 5.15.212 ≤ v < 5.15.222, 6.1.178 ≤ v < 6.1.189, 6.6.145 ≤ v < 6.6.158, 6.12.97 ≤ v < 6.12.111, 6.18.40 ≤ v < 6.18.53, 7.1.4 ≤ v < 7.2, 7.2 | 955973fff4a36d39a848b00cac1706863f568fe1, 550feab5b01000ab314868b62211fb3ddfd600e8, 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38, 3feb4020bfb7ccf0d347f27051639d25e19cd65d, 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53, 19ddef61ee0a49782a60f8f497e50597ad5de2da, 63be3d8511bdafa095cd14a393cbf3c58dbbb928, e780259b54e618ceb4763fbc21314acf3565e813, 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2 |
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