A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorLocal
ComplexityLow
RequirementsPresent
PrivilegesLow
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | AV: P→L, AC: H→L, PR: H→L, UI: A→N, VC: N→H, VI: N→H, VA: N→H | 0.0 → 4.4 |
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 0.0 → 0.0 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| debian | debian_linux | 9.0 |
| fedoraproject | fedora | 32 |
| fedoraproject | fedora | 33 |
| fedoraproject | fedora | 34 |
| linux | linux_kernel | ≥ 4.5, < 4.9.267 |
| linux | linux_kernel | ≥ 4.10, < 4.14.231 |
| linux | linux_kernel | ≥ 4.15, < 4.19.187 |
| linux | linux_kernel | ≥ 4.20, < 5.4.112 |
| linux | linux_kernel | ≥ 5.5, < 5.10.30 |
| linux | linux_kernel | ≥ 5.11, < 5.11.14 |
| linux | linux_kernel | ≥ 3.6, < 4.4.267 |
| n/a | Linux Kernel | All |
| netapp | active_iq_unified_manager | All versions |
| netapp | cloud_backup | All versions |
| netapp | h300e_firmware | All versions |
| netapp | h300s_firmware | All versions |
| netapp | h410c_firmware | All versions |
| netapp | h410s_firmware | All versions |
| netapp | h500e_firmware | All versions |
| netapp | h500s_firmware | All versions |
| netapp | h700e_firmware | All versions |
| netapp | h700s_firmware | All versions |
| netapp | solidfire_baseboard_management_controller_firmware | All versions |
Published: 2021-05-26
