CVE-2013-4368
The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized…
- 1.9LowCVSS base score
- 0.37%Exploitation in 30 daysEPSS · top 69% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register.
Timeline
ID reserved
By redhat
- 4 months later
· 4 months later
Published
- 11 years later
· 11 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Low1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 1.9.
Affected products
n/a
- affected n/a
References
9
- SUSE-SU-2014:0470 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- GLSA-201407-03 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- [oss-security] 20131010 Xen Security Advisory 67 (CVE-2013-4368) - Information leak through outs instruction emulation (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- xen-cve20134368-info-disc(87799) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- RHSA-2013:1449 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- SUSE-SU-2014:0446 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- DSA-3006 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- SUSE-SU-2014:0411 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2013:1636 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2013-4250 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2013-4368)Record last updated .