CVE-2021-20257

Name
CVE-2021-20257
Description
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html
MISC https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8
MISC https://bugzilla.redhat.com/show_bug.cgi?id=1930087
MISC https://www.openwall.com/lists/oss-security/2021/02/25/2
Third Party Advisory https://security.netapp.com/advisory/ntap-20220425-0003/

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* qemu >= None < 6.2.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
qemu 3.15-community 6.1.1-r0 Natanael Copa <ncopa@alpinelinux.org> fixed