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CVE-2026-62428

grant-table: type confusion in grant-copy

7.8 HighFix available

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.11%Unchanged since Jul 29, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.8

grant-table: type confusion in grant-copy

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Record
CVE-2026-62428
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
EUVDEUVD-2026-49779 7.8

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Record
EUVD-2026-49779
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-qmxg-rhxf-8273 7.8

When grant-copy operations are processed, the respective grant may or may not already be in use...

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Record
GHSA-qmxg-rhxf-8273
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
NVD 7.8

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Record
CVE-2026-62428
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
OSVALPINE-CVE-2026-62428 7.8

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Record
ALPINE-CVE-2026-62428
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2026-62428 7.8

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Record
DEBIAN-CVE-2026-62428
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
Show 7 moreShow less
OSVUBUNTU-CVE-2026-62428 7.8

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation (a mapping or another copy). For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant (the grant is "pinned"), what is being supplied back to actually carry out permission checks and copy operation may not be consistent: The permission check may be carried out on a page different from the one involved in the copy.

Record
UBUNTU-CVE-2026-62428
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2026:11441-1 No score

xen-4.22.0_02-1.1 on GA media

These are all security issues fixed in the xen-4.22.0_02-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11441-1
Updated
2026-11-02
OSVSUSE-SU-2026:3409-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3409-1
Updated
2026-11-02
OSVSUSE-SU-2026:3423-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3423-1
Updated
2026-11-02
OSVSUSE-SU-2026:3451-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3451-1
Updated
2026-11-02
OSVSUSE-SU-2026:3462-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3462-1
Updated
2026-11-02
OSVSUSE-SU-2026:4090-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to version 4.20.3 (jsc#PED-8907).

Security issues fixed:

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding (bsc#1276838).
  • CVE-2026-79602: x86: improper handling of HVM emulation return codes (bsc#1276839).
  • CVE-2026-79603: unconditionally do TLB flushing ahead of page scrubbing (bsc#1276841).
  • pygrub is only supported in de-privileged mode (bsc#1271947).

Non security issue fixed:

  • Xen: Missing upstream bug fixes (bsc#1027519).
Record
SUSE-SU-2026:4090-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.21
 before 4.19.6-r0
4.19.6-r0
xen
Alpine:v3.22
 before 4.20.4-r0
4.20.4-r0
xen
Alpine:v3.23
 before 4.20.4-r0
4.20.4-r0
xen
Alpine:v3.24
 before 4.21.2-r0
4.21.2-r0
xen
Debian:12
 before 4.17.7-0+deb12u1, plus listed versions
4.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1~deb12u14.17.2-1
Show 9 moreShow less
4.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.14.17.3+10-g091466ba55-1.1~exp14.17.3+10-g091466ba55-1.1~exp24.17.3+10-g091466ba55-1~deb12u14.17.3+36-g54dacb5c02-14.17.5+23-ga4e5191dc0-14.17.5+23-ga4e5191dc0-1+deb12u14.17.5+72-g01140da4e8-1
4.17.7-0+deb12u1
xen
Debian:13
 before 4.20.3+127-gc42374a105-0+deb13u1, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+37-g61ff35323e-0+deb13u14.20.2+37-g61ff35323e-14.20.2+7-g1badcf5035-0+deb13u14.20.2+7-g1badcf5035-14.20.2+7-g1badcf5035-2
4.20.3+127-gc42374a105-0+deb13u1
xen
Debian:14
 before 4.20.3+127-gc42374a105-1, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+37-g61ff35323e-14.20.2+7-g1badcf5035-14.20.2+7-g1badcf5035-2
4.20.3+127-gc42374a105-1
xen
SUSE:Linux Enterprise Server 15 SP6-LTSS
 before 4.18.5_20-150600.3.53.3
4.18.5_20-150600.3.53.3
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP6
 before 4.18.5_20-150600.3.53.3
4.18.5_20-150600.3.53.3
xen
SUSE:Linux Enterprise Micro 5.5
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
Show 22 moreShow less
Affected packages
PackageAffectedFixed
xen
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise Server 15 SP5-LTSS
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP5
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise Server 12 SP5-LTSS
 before 4.12.4_72-3.148.4
4.12.4_72-3.148.4
xen
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
 before 4.12.4_72-3.148.4
4.12.4_72-3.148.4
xen
SUSE:Linux Enterprise Micro 5.3
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Micro 5.4
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Server 15 SP4-LTSS
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP7
 before 4.20.4_04-150700.3.46.1
4.20.4_04-150700.3.46.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP7
 before 4.20.4_04-150700.3.46.1
4.20.4_04-150700.3.46.1
xen
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.5.1-0ubuntu14.5.1-0ubuntu24.6.0-1ubuntu14.6.0-1ubuntu24.6.0-1ubuntu4
Show 7 moreShow less
4.6.0-1ubuntu4.14.6.0-1ubuntu4.24.6.0-1ubuntu4.34.6.5-0ubuntu14.6.5-0ubuntu1.14.6.5-0ubuntu1.24.6.5-0ubuntu1.4
 None known
xen
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.9.0-0ubuntu34.9.0-0ubuntu44.9.2-0ubuntu1
 None known
xen
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.9.2-0ubuntu24.9.2-0ubuntu64.9.2-0ubuntu74.11.3+24-g14b62ab3e5-1ubuntu14.11.3+24-g14b62ab3e5-1ubuntu24.11.3+24-g14b62ab3e5-1ubuntu2.24.11.3+24-g14b62ab3e5-1ubuntu2.3
 None known
xen
Ubuntu:22.04:LTS
 All versions, plus listed versions
4.11.4+24-gddaaccbbab-1ubuntu24.16.0-1~ubuntu24.16.0-1~ubuntu2.1
 None known
xen
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.17.2-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1ubuntu14.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.1ubuntu24.17.3+10-g091466ba55-1.1ubuntu3
 None known
xen
Ubuntu:26.10
 All versions, plus listed versions
4.20.2+7-g1badcf5035-2build24.20.2+37-g61ff35323e-1ubuntu14.20.3+127-gc42374a105-1
 None known
xen
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+7-g1badcf5035-24.20.2+7-g1badcf5035-2build2
 None known
xen
openSUSE:Tumbleweed
 before 4.22.0_02-1.1
4.22.0_02-1.1

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-62428 is a high vulnerability (CVSS 7.8) in Xen, published July 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.11%, the 1st percentile. Fixed in xen 4.19.6-r0.

References

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