CVE-2015-8701

low-risk
Published 2016-12-29

QEMU (aka Quick Emulator) built with the Rocker switch emulation support is vulnerable to an off-by-one error. It happens while processing transmit (tx) descriptors in 'tx_consume' routine, if a descriptor was to have more than allowed (ROCKER_TX_FRAGS_MAX=16) fragments. A privileged user inside guest could use this flaw to cause memory leakage on the host or crash the QEMU process instance resulting in DoS issue.

Do I need to act?

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0.07% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Qemu

References (12)

Mailing List http://www.openwall.com/lists/oss-security/2015/12/28/6
Mailing List http://www.openwall.com/lists/oss-security/2015/12/29/1
Third Party Advisory http://www.securityfocus.com/bid/79706
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1286971
Patch https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html
Third Party Advisory https://security.gentoo.org/glsa/201602-01
Mailing List http://www.openwall.com/lists/oss-security/2015/12/28/6
Mailing List http://www.openwall.com/lists/oss-security/2015/12/29/1
Third Party Advisory http://www.securityfocus.com/bid/79706
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1286971
Patch https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html
Third Party Advisory https://security.gentoo.org/glsa/201602-01
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal