CVE-2021-47327
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails arm_smmu_rpm_get() invokes pm_runtime_get_sync(), which increases the refcount of the "smmu" even though the return value is less than 0. The reference counting issue happens in some error handling paths of arm_smmu_rpm_get() in its caller functions. When arm_smmu_rpm_get() fails, the caller functions forget to decrease the refcount of "smmu" increased by arm_smmu_rpm_get(), causing a refcount leak. Fix this issue by calling pm_runtime_resume_and_get() instead of pm_runtime_get_sync() in arm_smmu_rpm_get(), which can keep the refcount balanced in case of failure.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| d4a44f0750bb9bf7c44c22444a482756b2344a79 | affected | git | 3761ae0d0e549f2acdaf11f49df4ed06d256b20f | Unavailable | None listed |
| d4a44f0750bb9bf7c44c22444a482756b2344a79 | affected | git | c4007596fbdabc29f858dc2e1990858a146b60b2 | Unavailable | None listed |
| d4a44f0750bb9bf7c44c22444a482756b2344a79 | affected | git | fbf4daa6f4105e01fbd3868006f65c163365c1e3 | Unavailable | None listed |
| d4a44f0750bb9bf7c44c22444a482756b2344a79 | affected | git | fe92c058199067ae90cf2a901ddf3c271893557a | Unavailable | None listed |
| d4a44f0750bb9bf7c44c22444a482756b2344a79 | affected | git | 1adf30f198c26539a62d761e45af72cde570413d | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.0 | Unavailable | None listed |
| 5.4.134 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.52 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.19 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13.4 | unaffected | semver | Unavailable | 5.13.* | None listed |
| 5.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |