macvlan: fix possible UAF in macvlan_forward_source()
Summary
| CVE | CVE-2026-23001 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-01-25 15:15:54 UTC |
| Updated | 2026-04-27 14:16:28 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/[email protected]/T/#u |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-416
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 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 79cf79abce71eb7dbc40e2f3121048ca5405cb47 8133e85b8a3ec9f10d861e0002ec6037256e987e git | Not specified |
| CNA | Linux | Linux | affected 79cf79abce71eb7dbc40e2f3121048ca5405cb47 484919832e2db6ce1e8add92c469e5d459a516b5 git | Not specified |
| CNA | Linux | Linux | affected 79cf79abce71eb7dbc40e2f3121048ca5405cb47 232afc74a6dde0fe1830988e5827921f5ec9bb3f git | Not specified |
| CNA | Linux | Linux | affected 79cf79abce71eb7dbc40e2f3121048ca5405cb47 15f6faf36e162532bec5cc05eb3fc622108bf2ed git | Not specified |
| CNA | Linux | Linux | affected 79cf79abce71eb7dbc40e2f3121048ca5405cb47 8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 git | Not specified |
| CNA | Linux | Linux | affected 79cf79abce71eb7dbc40e2f3121048ca5405cb47 6dbead9c7677186f22b7981dd085a0feec1f038e git | Not specified |
| CNA | Linux | Linux | affected 79cf79abce71eb7dbc40e2f3121048ca5405cb47 7470a7a63dc162f07c26dbf960e41ee1e248d80e git | Not specified |
| CNA | Linux | Linux | affected 3.18 | Not specified |
| CNA | Linux | Linux | unaffected 3.18 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.249 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.199 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.162 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.122 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.67 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.7 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6dbead9c7677186f22b7981dd085a0feec1f038e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/8133e85b8a3ec9f10d861e0002ec6037256e987e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/484919832e2db6ce1e8add92c469e5d459a516b5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/232afc74a6dde0fe1830988e5827921f5ec9bb3f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/15f6faf36e162532bec5cc05eb3fc622108bf2ed | 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.