An off-by-one read/write issue was found in the SDHCI device of QEMU. It occurs when reading/writing the Buffer Data Port Register in sdhci_read_dataport and sdhci_write_dataport, respectively, if data_count == block_size. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.
Weakness
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Qemu | Qemu | * | 7.1.0 (excluding) |
| Qemu | Qemu | 7.1.0 (including) | 7.1.0 (including) |
| Qemu | Qemu | 7.1.0-rc0 (including) | 7.1.0-rc0 (including) |
| Qemu | Qemu | 7.1.0-rc1 (including) | 7.1.0-rc1 (including) |
| Qemu | Qemu | 7.1.0-rc2 (including) | 7.1.0-rc2 (including) |
| Qemu | Qemu | 7.1.0-rc3 (including) | 7.1.0-rc3 (including) |
| Qemu | Qemu | 7.1.0-rc4 (including) | 7.1.0-rc4 (including) |
| Qemu | Ubuntu | bionic | * |
| Qemu | Ubuntu | focal | * |
| Qemu | Ubuntu | kinetic | * |
| Qemu | Ubuntu | lunar | * |
| Qemu | Ubuntu | mantic | * |
| Qemu | Ubuntu | oracular | * |
| Qemu | Ubuntu | plucky | * |
| Qemu | Ubuntu | trusty | * |
| Qemu | Ubuntu | trusty/esm | * |
| Qemu | Ubuntu | xenial | * |