sctp: fix addr_wq_timer race in sctp_free_addr_wq()
In the Linux kernel, the following vulnerability has been resolved: sctp: fix addr_wq_timer race in sctp_free_addr_wq() sctp_free_addr_wq() previously removed addr_wq_timer using timer_delete() while holding addr_wq_lock. However, timer_delete() does not guarantee that a currently running timer handler has completed. This allows a race with sctp_addr_wq_timeout_handler(), where the handler may still run after addr_waitq has been freed, acquire addr_wq_lock, and access freed memory, leading to a use-after-free. Fix this by calling timer_shutdown_sync() before taking addr_wq_lock. This guarantees that any in-flight timer handler has finished and prevents the timer from being re-armed during teardown, making subsequent cleanup safe.
CVE-2026-72383
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-2026-72383
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": "4db67e808640e3934d82ce61ee8e2e89fd877ba8",
"lessThan": "5098308ad72f83f3b1a48c247dddab1695114bae",
"versionType": "git"
},
{
"status": "affected",
"version": "4db67e808640e3934d82ce61ee8e2e89fd877ba8",
"lessThan": "d49eff15261dd62e4fa3a316c26cb1f537a60464",
"versionType": "git"
},
{
"status": "affected",
"version": "4db67e808640e3934d82ce61ee8e2e89fd877ba8",
"lessThan": "a8323fb2ab6cd6978f359daeed6688e0cadf32ba",
"versionType": "git"
},
{
"status": "affected",
"version": "4db67e808640e3934d82ce61ee8e2e89fd877ba8",
"lessThan": "c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1",
"versionType": "git"
},
{
"status": "affected",
"version": "4db67e808640e3934d82ce61ee8e2e89fd877ba8",
"lessThan": "976c19de0f22a857ba0112f39635f8fd7a257568",
"versionType": "git"
}
],
"programFiles": [
"net/sctp/protocol.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sctp/protocol.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72383
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46512 · Revision 1
- Added to Heist Feed
- Publisher date