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.
Created qemu tracking bugs for this issue:
Affects: epel-all [bug 2140585]
Affects: fedora-all [bug 2140584]
*** Bug 2083064 has been marked as a duplicate of this bug. ***
(better) patch by Philippe Mathieu-Daudé:
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):
Not yet merged upstream due to a CI failure: