CVE-2023-6693

Summary

A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the out_sg variable could be used to read a part of process memory and send it to the wire, causing an information leak.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 88100020240314161907.e155f54d < *unaffected
Red HatRed Hat Enterprise Linux 88100020240314161907.e155f54d < *unaffected
Red HatRed Hat Enterprise Linux 917:9.0.0-10.el9_5.3 < *unaffected

Weaknesses

  • CWE-121: Stack-based Buffer Overflow

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References