A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
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 |
| linux | linux_kernel | ≥ 4.5, < 4.9.245 |
| linux | linux_kernel | ≥ 4.10, < 4.14.208 |
| linux | linux_kernel | ≥ 4.15, < 4.19.159 |
| linux | linux_kernel | ≥ 4.20, < 5.4.79 |
| linux | linux_kernel | ≥ 5.5, < 5.9.10 |
| linux | linux_kernel | < 4.4.245 |
| n/a | Linux Kernel | 5.9.4 |
| 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_\&_hci_management_node | All versions |
| netapp | solidfire_baseboard_management_controller | All versions |
Published: 2021-05-26
