6.5

CVE-2017-14318: xen NULL Pointer Dereference

Modified
AliasesALPINE-CVE-2017-14318UBUNTU-CVE-2017-14318DEBIAN-CVE-2017-14318
Published 12-09-2017Last modified 05-08-2024

Vulnerability summary

CVE-2017-14318 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in xen. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 29.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.0 (NVD)
EPSS score
0.35%
0%100%
Low · -0.07 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
DLA-1132-1DSA-4050-1SUSE-SU-2017:2420-1SUSE-SU-2017:2466-1SUSE-SU-2017:2519-1

Timeline

  1. 12-09-2017
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

Decrease -0.07 pp

From 0.42% on 05-10-2026

05-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • xen< 4.9.0-r4 | < 4.6.3-r9 | < 4.6.3-r11 | < 4.7.2-r2 | < 4.8.2-r1
Debian1 product
  • xen< 4.8.2+xsa245-0+deb9u1
Ubuntu1 product
  • xen< 4.6.5-0ubuntu1.4
Xen1 product
  • xen4.5.0 | 4.5.1 | 4.5.2 | 4.5.3 | 4.5.5 | 4.6.0 | 4.6.1 | 4.6.3 | 4.6.4 | 4.6.5 | 4.6.6 | 4.7.0 | 4.7.1 | 4.7.2 | 4.7.3 | 4.8.0 | 4.8.1 | 4.9.0

4 vendors · 4 products

References

10 links