eventpoll: defer struct eventpoll free to RCU grace period
Summary
| CVE | CVE-2026-43074 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-06 10:16:20 UTC |
| Updated | 2026-05-20 23:20:05 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU callback to prevent UAF. |
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: 0.000130000 probability, percentile 0.023990000 (date 2026-05-12)
Problem Types: CWE-401
| 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
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 58c9b016e12855286370dfb704c08498edbc857a a6566cd33f6f967a7651ebf2ce0dd31572e319cf git | Not specified |
| CNA | Linux | Linux | affected 58c9b016e12855286370dfb704c08498edbc857a 5b1173b165421561db29f30afc7e97d940a398a9 git | Not specified |
| CNA | Linux | Linux | affected 58c9b016e12855286370dfb704c08498edbc857a 7e8083f5eeedab0f460063b9c2c14c9a4e71a427 git | Not specified |
| CNA | Linux | Linux | affected 58c9b016e12855286370dfb704c08498edbc857a ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 git | Not specified |
| CNA | Linux | Linux | affected 58c9b016e12855286370dfb704c08498edbc857a 07712db80857d5d09ae08f3df85a708ecfc3b61f git | Not specified |
| CNA | Linux | Linux | affected 6.4 | Not specified |
| CNA | Linux | Linux | unaffected 6.4 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.136 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.83 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.24 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.14 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| 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.