exec: do_close_on_exec() before taking exec_update_lock
Summary
| CVE | CVE-2026-98388 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-10-14 14:17:49 UTC |
|---|
| Updated | 2026-10-19 10:18:42 UTC |
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| 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. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected ae1e630bcaac739f625822078edbaea98366930d 955973fff4a36d39a848b00cac1706863f568fe1 git |
Not specified |
| CNA |
Linux |
Linux |
affected d54f14655fd7d7b293698a8b6918563c4c0465e7 550feab5b01000ab314868b62211fb3ddfd600e8 git |
Not specified |
| CNA |
Linux |
Linux |
affected bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38 git |
Not specified |
| CNA |
Linux |
Linux |
affected 7456ae990a9738962b33146916fabca62ae3d4e0 3feb4020bfb7ccf0d347f27051639d25e19cd65d git |
Not specified |
| CNA |
Linux |
Linux |
affected 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53 git |
Not specified |
| CNA |
Linux |
Linux |
affected f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 19ddef61ee0a49782a60f8f497e50597ad5de2da git |
Not specified |
| CNA |
Linux |
Linux |
affected 6650527444dadc63d84aa939d14ecba4fadb2f69 63be3d8511bdafa095cd14a393cbf3c58dbbb928 git |
Not specified |
| CNA |
Linux |
Linux |
affected 6650527444dadc63d84aa939d14ecba4fadb2f69 e780259b54e618ceb4763fbc21314acf3565e813 git |
Not specified |
| CNA |
Linux |
Linux |
affected c1cfd63326f5d09999134e9052c353faf738286e git |
Not specified |
| CNA |
Linux |
Linux |
affected 5.10.261 5.10.271 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 5.15.212 5.15.222 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.1.178 6.1.189 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.6.145 6.6.158 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.12.97 6.12.111 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.18.40 6.18.53 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 7.1.4 7.2 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 7.2 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.10.271 5.10.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.222 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.189 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.158 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.111 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.53 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2.7 7.2.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.3 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.