CVE-2021-47060
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)
KVM: Stop looking for coalesced MMIO zones if the bus is destroyed
In the Linux kernel, the following vulnerability has been resolved: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices _except_ the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continue iterating on coalesced_zones after future entries (in the walk) have been deleted. Opportunistically add curly braces to the for-loop, which encompasses many lines but sneaks by without braces due to the guts being a single if statement.
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) |
|---|---|---|---|---|---|
| 41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d | affected | git | 7d1bc32d6477ff96a32695ea4be8144e4513ab2d | Unavailable | None listed |
| f65886606c2d3b562716de030706dfe1bea4ed5e | affected | git | 2a20592baff59c5351c5200ec667e1a2aa22af85 | Unavailable | None listed |
| f65886606c2d3b562716de030706dfe1bea4ed5e | affected | git | 168e82f640ed1891a700bdb43e37da354b2ab63c | Unavailable | None listed |
| f65886606c2d3b562716de030706dfe1bea4ed5e | affected | git | 50cbad42bfea8c052b7ca590bd4126cdc898713c | Unavailable | None listed |
| f65886606c2d3b562716de030706dfe1bea4ed5e | affected | git | 5d3c4c79384af06e3c8e25b7770b6247496b4417 | Unavailable | None listed |
| f0dfffce3f4ffd5f822568a4a6fb34c010e939d1 | affected | git | Unavailable | Unavailable | None listed |
| 840e124f89a5127e7eb97ebf377f4b8ca745c070 | affected | git | Unavailable | Unavailable | None listed |
| 40a023f681befd9b2862a3c16fb306a38b359ae5 | affected | git | Unavailable | Unavailable | None listed |
| 19184bd06f488af62924ff1747614a8cb284ad63 | affected | git | Unavailable | Unavailable | None listed |
| 68c125324b5e1d1d22805653735442923d896a1d | affected | git | Unavailable | Unavailable | None listed |
| 5.4.66 | affected | semver | 5.4.119 | Unavailable | None listed |
| 4.4.238 | affected | semver | 4.5 | Unavailable | None listed |
| 4.9.238 | affected | semver | 4.10 | Unavailable | None listed |
| 4.14.200 | affected | semver | 4.15 | Unavailable | None listed |
| 4.19.148 | affected | semver | 4.20 | Unavailable | None listed |
| 5.8.10 | affected | semver | 5.9 | 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) |
|---|---|---|---|---|---|
| 5.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.9 | Unavailable | None listed |
| 5.4.119 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.37 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.11.21 | unaffected | semver | Unavailable | 5.11.* | None listed |
| 5.12.4 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |