CVE-2017-6058 — Buffer overflow in NetRxPkt::ehdr_buf in hw/net/net_rx_pkt

Buffer overflow in NetRxPkt::ehdr_buf in hw/net/net_rx_pkt.c in QEMU (aka Quick Emulator), when the VLANSTRIP feature is enabled on the vmxnet3 device, allows remote attackers to cause a denial of service (out-of-bounds access and QEMU process crash) via vectors related to VLAN s

01What is this vulnerability?

Buffer overflow in NetRxPkt::ehdr_buf in hw/net/net_rx_pkt.c in QEMU (aka Quick Emulator), when the VLANSTRIP feature is enabled on the vmxnet3 device, allows remote attackers to cause a denial of service (out-of-bounds access and QEMU process crash) via vectors related to VLAN stripping.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-03-20T16:59:02.250
• Last modified: 2026-05-13T00:24:29.033

09References

• git.qemu-project.org — http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=df8bf7a7fe75eb5d5caffa55f…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2017/02/17/2
• www.securityfocus.com — http://www.securityfocus.com/bid/96277
• www.securitytracker.com — http://www.securitytracker.com/id/1037856
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1423358
• lists.nongnu.org — https://lists.nongnu.org/archive/html/qemu-devel/2017-02/msg03527.html
• security.gentoo.org — https://security.gentoo.org/glsa/201704-01
• git.qemu-project.org — http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=df8bf7a7fe75eb5d5caffa55f…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2017/02/17/2
• www.securityfocus.com — http://www.securityfocus.com/bid/96277