exec: do_close_on_exec() before taking exec_update_lock
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.
CVE-2026-98388
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98388
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ae1e630bcaac739f625822078edbaea98366930d",
"lessThan": "955973fff4a36d39a848b00cac1706863f568fe1",
"versionType": "git"
},
{
"status": "affected",
"version": "d54f14655fd7d7b293698a8b6918563c4c0465e7",
"lessThan": "550feab5b01000ab314868b62211fb3ddfd600e8",
"versionType": "git"
},
{
"status": "affected",
"version": "bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9",
"lessThan": "5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38",
"versionType": "git"
},
{
"status": "affected",
"version": "7456ae990a9738962b33146916fabca62ae3d4e0",
"lessThan": "3feb4020bfb7ccf0d347f27051639d25e19cd65d",
"versionType": "git"
},
{
"status": "affected",
"version": "4bfe8c481846cee52473a2f7d7b30ee8e6749fc4",
"lessThan": "0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53",
"versionType": "git"
},
{
"status": "affected",
"version": "f9b4b03ccc9c69bf7f7298d4559906ebea7143b3",
"lessThan": "19ddef61ee0a49782a60f8f497e50597ad5de2da",
"versionType": "git"
},
{
"status": "affected",
"version": "6650527444dadc63d84aa939d14ecba4fadb2f69",
"lessThan": "63be3d8511bdafa095cd14a393cbf3c58dbbb928",
"versionType": "git"
},
{
"status": "affected",
"version": "6650527444dadc63d84aa939d14ecba4fadb2f69",
"lessThan": "e780259b54e618ceb4763fbc21314acf3565e813",
"versionType": "git"
},
{
"status": "affected",
"version": "c1cfd63326f5d09999134e9052c353faf738286e",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.261",
"lessThan": "5.10.271",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.212",
"lessThan": "5.15.222",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.178",
"lessThan": "6.1.189",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.145",
"lessThan": "6.6.158",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.97",
"lessThan": "6.12.111",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.40",
"lessThan": "6.18.53",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.1.4",
"lessThan": "7.2",
"versionType": "semver"
}
],
"programFiles": [
"fs/exec.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/exec.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98388
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38455 · Revision 1
- Added to Heist Feed
- Publisher date