CVE-2021-22555
linux-ltsVulnerabilityCVSS 8.3PatchedPoC
A public proof-of-concept or exploit code is available, raising the risk of active exploitation. A fixed version is available (see the table below).
Recommended action: Update to the fixed version listed for your distribution using the native package manager.
Severity metrics
CVSS 3.1 : 8.3 HIGH · CVSS 2.0 : 4.6 MEDIUM
Attack vectorAdjacent network
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Vector: AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected & fixed versions by distribution
Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.
| Distribution | Package | Affected | Fixed version | Status |
|---|---|---|---|---|
| Arch | linux-lts | 5.10.30-1 | 5.10.31-1 | fixed |
| Arch | linux-hardened | 5.11.14.hardened1-1 | 5.11.15.hardened1-1 | fixed |
| Arch | linux-zen | 5.11.14.zen1-1 | 5.11.15.zen1-2 | fixed |
| Arch | linux | 5.11.14.arch1-1 | 5.11.15.arch1-2 | fixed |
| Debian:11 | linux | - | 5.10.38-1 | fixed |
| Debian:12 | linux | - | 5.10.38-1 | fixed |
| Debian:13 | linux | - | 5.10.38-1 | fixed |
| Debian:14 | linux | - | 5.10.38-1 | fixed |
| Ubuntu:Pro:16.04:LTS | linux | - | 4.4.0-213.245 | fixed |
| Ubuntu:Pro:18.04:LTS | linux | - | 4.15.0-144.148 | fixed |
| Ubuntu:Pro:20.04:LTS | linux | - | 5.4.0-74.83 | fixed |
| Ubuntu:Pro:16.04:LTS | linux | - | 4.4.0-214.246 | fixed |
| Ubuntu:Pro:18.04:LTS | linux | - | 4.15.0-156.163 | fixed |
| Ubuntu:Pro:20.04:LTS | linux | - | 5.4.0-84.94 | fixed |
| Ubuntu:Pro:16.04:LTS | linux | - | 4.4.0-218.251 | fixed |
| Ubuntu:Pro:18.04:LTS | linux | - | 4.15.0-166.174 | fixed |
| Ubuntu:Pro:20.04:LTS | linux | - | 5.4.0-92.103 | fixed |
| SUSE:Linux Enterprise Module for Basesystem 15 SP3 | kernel-default-base | - | 5.3.18-59.16.1.18.8.1 | fixed |
| SUSE:Linux Enterprise Module for Basesystem 15 SP2 | kernel-default-base | - | 5.3.18-24.75.3.9.34.3 | fixed |
| SUSE:Linux Enterprise Micro 5.0 | kernel-default-base | - | 5.3.18-24.75.3.9.34.3 | fixed |
| openSUSE:Leap 15.2 | kernel-default | - | 5.3.18-lp152.84.1 | fixed |
| openSUSE:Leap 15.3 | kernel-default | - | 5.3.18-59.16.1 | fixed |
| openSUSE:Leap 15.3 | kernel-default | - | 4.12.14-197.99.1 | fixed |
| openSUSE:Leap 15.2 | kernel-default-base | - | 5.3.18-lp152.84.1.lp152.8.38.1 | fixed |
| openSUSE:Leap 15.3 | kernel-default-base | - | 5.3.18-59.16.1.18.8.1 | fixed |
| Red Hat:enterprise_linux:8::baseos | kernel | - | 0:4.18.0-305.12.1.el8_4 | fixed |
| Red Hat:rhel_eus:8.1::baseos | kernel | - | 0:4.18.0-147.52.1.el8_1 | fixed |
| Red Hat:rhel_aus:7.3::server | kernel | - | 0:3.10.0-514.92.1.el7 | fixed |
| Red Hat:enterprise_linux:7::client | kernel | - | 0:3.10.0-1160.41.1.el7 | fixed |
| Red Hat:enterprise_linux:7::server | kernel | - | 0:3.10.0-1160.41.1.el7 | fixed |
| Red Hat:enterprise_linux:7::workstation | kernel | - | 0:3.10.0-1160.41.1.el7 | fixed |
| Red Hat:rhel_eus:8.2::baseos | kernel | - | 0:4.18.0-193.64.1.el8_2 | fixed |
| Red Hat:rhel_aus:7.2::server | kernel | - | 0:3.10.0-327.100.1.el7 | fixed |
| Red Hat:rhel_aus:7.7::server | kernel | - | 0:3.10.0-1062.56.1.el7 | fixed |
| Red Hat:rhel_e4s:7.7::server | kernel | - | 0:3.10.0-1062.56.1.el7 | fixed |
| Red Hat:rhel_tus:7.7::server | kernel | - | 0:3.10.0-1062.56.1.el7 | fixed |
| Red Hat:rhel_aus:7.4::server | kernel | - | 0:3.10.0-693.94.1.el7 | fixed |
| Red Hat:rhel_aus:7.6::server | kernel | - | 0:3.10.0-957.84.1.el7 | fixed |
| Red Hat:rhel_e4s:7.6::server | kernel | - | 0:3.10.0-957.84.1.el7 | fixed |
| Red Hat:rhel_tus:7.6::server | kernel | - | 0:3.10.0-957.84.1.el7 | fixed |