sctp: fix addr_wq_timer race in sctp_free_addr_wq()
Summary
| CVE | CVE-2026-72383 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:22:11 UTC |
| Updated | 2026-10-21 13:19:36 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001610000 probability, percentile 0.049070000 (date 2026-10-16)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 4db67e808640e3934d82ce61ee8e2e89fd877ba8 5098308ad72f83f3b1a48c247dddab1695114bae git | Not specified |
| CNA | Linux | Linux | affected 4db67e808640e3934d82ce61ee8e2e89fd877ba8 d49eff15261dd62e4fa3a316c26cb1f537a60464 git | Not specified |
| CNA | Linux | Linux | affected 4db67e808640e3934d82ce61ee8e2e89fd877ba8 a8323fb2ab6cd6978f359daeed6688e0cadf32ba git | Not specified |
| CNA | Linux | Linux | affected 4db67e808640e3934d82ce61ee8e2e89fd877ba8 c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1 git | Not specified |
| CNA | Linux | Linux | affected 4db67e808640e3934d82ce61ee8e2e89fd877ba8 976c19de0f22a857ba0112f39635f8fd7a257568 git | Not specified |
| CNA | Linux | Linux | affected 3.7 | Not specified |
| CNA | Linux | Linux | unaffected 3.7 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.160 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.114 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/976c19de0f22a857ba0112f39635f8fd7a257568 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5098308ad72f83f3b1a48c247dddab1695114bae | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d49eff15261dd62e4fa3a316c26cb1f537a60464 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a8323fb2ab6cd6978f359daeed6688e0cadf32ba | 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.