An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called, aka CID-f5449e74802c.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorLocal
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionActive
Threat
Exploit MaturityPoC
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 | PoC | E: U→P | 4.0 → 6.2 |
| 2026-07-21 | nvd | AV: P→L, AC: H→L, PR: H→N, VC: N→H, VI: N→H, VA: N→H | 0.0 → 4.0 |
| 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 |
|---|
| linux | linux_kernel | < 5.10 |
| 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 |
| starwindsoftware | starwind_san_\&_nas | v8r12 |
| starwindsoftware | starwind_virtual_san | v8 |
Published: 2021-06-07
