NULL pointer dereference in Xen
CVE-2011-2519
Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.5 (Medium). Vector: AV:A/AC:L/Au:S/C:N/I:N/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.007 (50.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Xen
- Red Hat Enterprise Linux Desktop — versions 5.0
- Red Hat Enterprise Linux Server — versions 5.0
- Red Hat Enterprise Linux Workstation — versions 5.0
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2011/08/30/1 (mailing-list, Mailing List, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2011-1212.html (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644 (Patch, Vendor Advisory)