4.7

CVE-2026-102700: gnttab: cache-flush handling may cause page reference leak

Awaiting analysis
AliasesALPINE-CVE-2026-102700DEBIAN-CVE-2026-102700UBUNTU-CVE-2026-102700
Published 13-10-2026Last modified 20-10-2026

Vulnerability summary

CVE-2026-102700 is a medium (CVSS 4.7) Improper Resource Shutdown or Release vulnerability in xen. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
SUSE-SU-2026:4641-1SUSE-SU-2026:4642-1SUSE-SU-2026:4732-1SUSE-SU-2026:4942-1

Timeline

  1. 13-10-2026
    PublishedVulnerability first disclosed.
  2. 20-10-2026
    Last modifiedVulnerability information updated.

Description

With its original introduction, GNTTAB_cache_flush was made available uniformly. XSA-232 (CVE-2017-14318) then covered an omitted NULL pointer check, yet the addition of that check failed to adjust the subsequent error path. That error path fails to drop a page reference in case the specified page is owned by a special system domain (DOM_IO and DOM_COW are system domains which can have memory pages assigned to them.)

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

14-10-202603-11-2026

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< 4.19.6-r2 | < 4.20.4-r2
Debian1 product
  • xenAll versions (No fix recorded) | < 4.20.4+39-gf1e1321c87-0+deb13u1 | < 4.20.4+39-gf1e1321c87-1
Ubuntu1 product
  • xenAll versions (No fix recorded)

3 vendors · 3 products

References

6 links