CVE-2021-20257
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.4%
exploitation probability
0.4%top 69% of all CVEs
observed exploitation
nono source reports it
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Affected products
n/a · QEMUReferences
https://bugzilla.redhat.com/show_bug.cgi?id=1930087https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlhttps://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.htmlhttps://security.gentoo.org/glsa/202208-27https://security.netapp.com/advisory/ntap-20220425-0003/https://www.openwall.com/lists/oss-security/2021/02/25/2