Description
An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then loops over the results, performing follow-up actions based on the success or failure of each operation. Unfortunately, when running in PV mode, the Linux backend drivers mishandle this: Some errors are ignored, effectively implying their success from the success of related batch elements. In other cases, errors resulting from one batch element lead to further batch elements not being inspected, and hence successful ones to not be possible to properly unmap upon error recovery. Only systems with Linux backends running in PV mode are vulnerable. Linux backends run in HVM / PVH modes are not vulnerable. This affects arch/*/xen/p2m.c and drivers/xen/gntdev.c.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.10.19-1 | — |
| Debian 13 | linux | 5.10.19-1 | — |
| Debian 12 | linux | 5.10.19-1 | — |
| Debian 9 | linux | 4.9.258-1 | DLA-2586-1 |
| Debian 9 | linux-4.19 | 4.19.181-1~deb9u1 | DLA-2610-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-71.79 | — |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1043.45 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1044.46 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1041.44 | — |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1041.43 | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1013.14 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1037.38 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1042.45 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1033.36 | — |
| Ubuntu 20.04 LTS | linux-riscv +17 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-143.147 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1102.109 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1043.45~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1114.127 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1044.46~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1018.22 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1099.112 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1041.44~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1040.42~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1013.14~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-71.79~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1091.93 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1071.79 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1042.45~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1033.36~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1085.90 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1102.111 | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-208.240 | — |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1126.140 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1091.100 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2044.46 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2026.29 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1059.67 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1060.66 | — |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1114.123~20.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1102.109~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1114.127~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1099.112~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-143.147~16.04.3 | — |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1071.79~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1090.94 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1114.127~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-208.240~14.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.38.1 | SUSE-SU-2021:0738-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.52.1.9.24.1 | SUSE-SU-2021:0741-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.52.1 | SUSE-SU-2021:0741-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.69.1 | SUSE-SU-2021:0740-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.50.1 | SUSE-SU-2021:1175-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.66.2 | SUSE-SU-2021:1210-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.71.1 | SUSE-SU-2021:0736-1 |
Show 28 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.141.2 | SUSE-SU-2021:0743-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_38 | 1-4.3.2 | SUSE-SU-2021:0743-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.152.2 | SUSE-SU-2021:0744-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_40 | 1-3.3.2 | SUSE-SU-2021:0744-1 |
| SLES for SAP 15 SP1 | kernel-docs +4 | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.69.1 | SUSE-SU-2021:0740-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.50.1 | SUSE-SU-2021:1175-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.66.2 | SUSE-SU-2021:1210-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.71.1 | SUSE-SU-2021:0736-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.141.2 | SUSE-SU-2021:0743-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_38 | 1-4.3.2 | SUSE-SU-2021:0743-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.152.2 | SUSE-SU-2021:0744-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_40 | 1-3.3.2 | SUSE-SU-2021:0744-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.37.1 | SUSE-SU-2021:1176-1 |
| SLE Micro 5.0 | kernel-default | 5.3.18-24.52.1 | SUSE-SU-2021:0741-1 |
| SLE Micro 5.0 | kernel-default-base | 5.3.18-24.52.1.9.24.1 | SUSE-SU-2021:0741-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.52.1 | SUSE-SU-2021:0741-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_11 | 1-5.3.1 | SUSE-SU-2021:0741-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_23 | 1-3.3.1 | SUSE-SU-2021:0737-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.69.1 | SUSE-SU-2021:0740-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_23 | 1-1.3.1 | SUSE-SU-2021:0740-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.66.2 | SUSE-SU-2021:1210-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_17 | 1-8.3.2 | SUSE-SU-2021:1210-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.71.1 | SUSE-SU-2021:0736-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_19 | 1-6.3.1 | SUSE-SU-2021:0736-1 |
| SLE HPC 15 SP1 | kernel-docs +4 | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.69.1 | SUSE-SU-2021:0740-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt +3 | 5.3.18-28.1 | SUSE-SU-2021:0735-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.71.1 | SUSE-SU-2021:0736-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.141.2 | SUSE-SU-2021:0743-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_38 | 1-4.3.2 | SUSE-SU-2021:0743-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.71.1 | SUSE-SU-2021:0736-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.141.2 | SUSE-SU-2021:0743-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_38 | 1-4.3.2 | SUSE-SU-2021:0743-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.152.2 | SUSE-SU-2021:0744-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_40 | 1-3.3.2 | SUSE-SU-2021:0744-1 |
| SUSE Manager Server 4.0 | kernel-docs +5 | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
| SUSE Manager Retail Branch Server 4.0 | kernel-docs +4 | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
| SUSE Manager Proxy 4.0 | kernel-docs +4 | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.141.2 | SUSE-SU-2021:0743-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_38 | 1-4.3.2 | SUSE-SU-2021:0743-1 |
| SUSE Enterprise Storage 6 | kernel-docs +4 | 4.12.14-197.86.1 | SUSE-SU-2021:0737-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.66.2.lp152.8.23.2 | openSUSE-SU-2021:0393-1 |
| openSUSE Leap 15.2 | kernel-docs +8 | 5.3.18-lp152.66.2 | openSUSE-SU-2021:0393-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.225-168.357 | 1.0-0.amzn2 | ALAS2-2021-1616 |
| Amazon Linux 2 | perf +8 | 4.14.225-168.357.amzn2 | ALAS2-2021-1616 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.48.3.1.el7uek | ELSA-2021-9135, ELSA-2021-9085, ELSA-2021-9079 |
| Oracle Linux 7 | kernel-uek-container | 4.14.35-2047.500.9.1.el7 | ELSA-2021-9136, ELSA-2021-9086, ELSA-2021-9068 |
| Oracle Linux 7 | kernel-uek-container-debug | 5.4.17-2036.103.3.1.el8 | ELSA-2021-9086, ELSA-2021-9057 |
| Oracle Linux 7 | perf +5 | 4.14.35-2047.500.9.1.el7uek | ELSA-2021-9135, ELSA-2021-9085, ELSA-2021-9067 |
Advisories 27
- DLA-2610-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2586-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2021:1210-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0743-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1175-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0740-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0736-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0735-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0737-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0738-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1176-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0744-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0741-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0393-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2021-9136 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 24, 2021
- ELSA-2021-9135 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 24, 2021
- ALAS2-2021-1616 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 19, 2021
- ELSA-2021-9085 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 11, 2021
- ELSA-2021-9086 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 9, 2021
- ELSA-2021-9079 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 3, 2021
- ELSA-2021-9067 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 19, 2021
- ELSA-2021-9068 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 19, 2021
- ELSA-2021-9058 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 17, 2021
- ELSA-2021-9051 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 16, 2021
- ELSA-2021-9053 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 16, 2021
- ELSA-2021-9057 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 16, 2021
- ELSA-2021-9052 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 16, 2021
References
- http://xenbits.xen.org/xsa/advisory-361.html
- FEDORA-2021-8d45d297c6 vendor-advisory
- FEDORA-2021-7143aca8cb vendor-advisory
- [debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update mailing-list
- https://security.netapp.com/advisory/ntap-20210326-0001/
- [debian-lts-announce] 20210330 [SECURITY] [DLA 2610-1] linux-4.19 security update mailing-list
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ebee0eab08594b2bd5db716288a4f1ae5936e9bc