CVE-2026-98388

exec: do_close_on_exec() before taking exec_update_lock

State: Published
Severity: Not scored
Published: Oct 14, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ae1e630bcaac739f625822078edbaea98366930d to before 955973fff4a36d39a848b00cac1706863f568fe1Affected d54f14655fd7d7b293698a8b6918563c4c0465e7 to before 550feab5b01000ab314868b62211fb3ddfd600e8Affected bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 to before 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38Affected 7456ae990a9738962b33146916fabca62ae3d4e0 to before 3feb4020bfb7ccf0d347f27051639d25e19cd65dAffected 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 to before 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53Affected f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 to before 19ddef61ee0a49782a60f8f497e50597ad5de2daAffected 6650527444dadc63d84aa939d14ecba4fadb2f69 to before 63be3d8511bdafa095cd14a393cbf3c58dbbb928Affected 6650527444dadc63d84aa939d14ecba4fadb2f69 to before e780259b54e618ceb4763fbc21314acf3565e813Affected c1cfd63326f5d09999134e9052c353faf738286eAffected 5.10.261 to before 5.10.271Affected 5.15.212 to before 5.15.222Affected 6.1.178 to before 6.1.189Affected 6.6.145 to before 6.6.158Affected 6.12.97 to before 6.12.111Affected 6.18.40 to before 6.18.53Affected 7.1.4 to before 7.2Affected
LinuxLinux	7.2Affected before 7.2Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.111 through 6.12.Not affected 6.18.53 through 6.18.Not affected 7.2.7 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

ae1e630bcaac739f625822078edbaea98366930d to before 955973fff4a36d39a848b00cac1706863f568fe1Affected
d54f14655fd7d7b293698a8b6918563c4c0465e7 to before 550feab5b01000ab314868b62211fb3ddfd600e8Affected
bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 to before 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38Affected
7456ae990a9738962b33146916fabca62ae3d4e0 to before 3feb4020bfb7ccf0d347f27051639d25e19cd65dAffected
4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 to before 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53Affected
f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 to before 19ddef61ee0a49782a60f8f497e50597ad5de2daAffected
6650527444dadc63d84aa939d14ecba4fadb2f69 to before 63be3d8511bdafa095cd14a393cbf3c58dbbb928Affected
6650527444dadc63d84aa939d14ecba4fadb2f69 to before e780259b54e618ceb4763fbc21314acf3565e813Affected
c1cfd63326f5d09999134e9052c353faf738286eAffected
5.10.261 to before 5.10.271Affected
5.15.212 to before 5.15.222Affected
6.1.178 to before 6.1.189Affected
6.6.145 to before 6.6.158Affected
6.12.97 to before 6.12.111Affected
6.18.40 to before 6.18.53Affected
7.1.4 to before 7.2Affected

LinuxLinux

7.2Affected
before 7.2Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.111 through 6.12.*Not affected
6.18.53 through 6.18.*Not affected
7.2.7 through 7.2.*Not affected
7.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.