CVE-2021-44733: Use After Free
First published: Thu Dec 09 2021(Updated: )
A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-372.9.1.rt7.166.el8 | 0:4.18.0-372.9.1.rt7.166.el8 |
| redhat/kernel | <0:4.18.0-372.9.1.el8 | 0:4.18.0-372.9.1.el8 |
| Linux Linux kernel | <=5.15.11 | |
| Redhat Enterprise Linux | =8.0 | |
| Fedoraproject Fedora | =35 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Netapp Baseboard Management Controller H410c Firmware | ||
| Netapp Baseboard Management Controller H410c | ||
| Netapp Baseboard Management Controller H300s Firmware | ||
| Netapp Baseboard Management Controller H300s | ||
| Netapp Baseboard Management Controller H500s Firmware | ||
| Netapp Baseboard Management Controller H500s | ||
| Netapp Baseboard Management Controller H700s Firmware | ||
| Netapp Baseboard Management Controller H700s | ||
| Netapp Baseboard Management Controller H300e Firmware | ||
| Netapp Baseboard Management Controller H300e | ||
| Netapp Baseboard Management Controller H500e Firmware | ||
| Netapp Baseboard Management Controller H500e | ||
| Netapp Baseboard Management Controller H700e Firmware | ||
| Netapp Baseboard Management Controller H700e | ||
| Netapp Baseboard Management Controller H410s Firmware | ||
| Netapp Baseboard Management Controller H410s | ||
| redhat/kernel | <5.16 | 5.16 |
| ubuntu/linux | <4.15.0-173.182 | 4.15.0-173.182 |
| ubuntu/linux | <5.4.0-105.119 | 5.4.0-105.119 |
| ubuntu/linux | <5.13.0-37.42 | 5.13.0-37.42 |
| ubuntu/linux | <5.16~ | 5.16~ |
| ubuntu/linux-aws | <4.15.0-1124.133 | 4.15.0-1124.133 |
| ubuntu/linux-aws | <5.4.0-1069.73 | 5.4.0-1069.73 |
| ubuntu/linux-aws | <5.13.0-1019.21 | 5.13.0-1019.21 |
| ubuntu/linux-aws | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.0 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.13 | <5.13.0-1019.21~20.04.1 | 5.13.0-1019.21~20.04.1 |
| ubuntu/linux-aws-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.4 | <5.4.0-1069.73~18.04.1 | 5.4.0-1069.73~18.04.1 |
| ubuntu/linux-aws-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-aws-hwe | <5.16~ | 5.16~ |
| ubuntu/linux-aws-hwe | <4.15.0-1124.133~16.04.1 | 4.15.0-1124.133~16.04.1 |
| ubuntu/linux-azure | <5.4.0-1073.76 | 5.4.0-1073.76 |
| ubuntu/linux-azure | <5.13.0-1021.24 | 5.13.0-1021.24 |
| ubuntu/linux-azure | <4.15.0-1134.147~14.04.1 | 4.15.0-1134.147~14.04.1 |
| ubuntu/linux-azure | <5.16~ | 5.16~ |
| ubuntu/linux-azure | <4.15.0-1134.147~16.04.1 | 4.15.0-1134.147~16.04.1 |
| ubuntu/linux-azure-4.15 | <4.15.0-1134.147 | 4.15.0-1134.147 |
| ubuntu/linux-azure-4.15 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.13 | <5.13.0-1021.24~20.04.1 | 5.13.0-1021.24~20.04.1 |
| ubuntu/linux-azure-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-5.4 | <5.4.0-1073.76~18.04.1 | 5.4.0-1073.76~18.04.1 |
| ubuntu/linux-azure-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-azure-edge | <5.16~ | 5.16~ |
| ubuntu/linux-azure-fde | <5.4.0-1073.76 | 5.4.0-1073.76 |
| ubuntu/linux-azure-fde | <5.16~ | 5.16~ |
| ubuntu/linux-bluefield | <5.4.0-1032.35 | 5.4.0-1032.35 |
| ubuntu/linux-bluefield | <5.16~ | 5.16~ |
| ubuntu/linux-dell300x | <4.15.0-1038.43 | 4.15.0-1038.43 |
| ubuntu/linux-dell300x | <5.16~ | 5.16~ |
| ubuntu/linux-fips | <5.16~ | 5.16~ |
| ubuntu/linux-gcp | <5.4.0-1068.72 | 5.4.0-1068.72 |
| ubuntu/linux-gcp | <5.13.0-1021.25 | 5.13.0-1021.25 |
| ubuntu/linux-gcp | <5.16~ | 5.16~ |
| ubuntu/linux-gcp | <4.15.0-1119.133~16.04.1 | 4.15.0-1119.133~16.04.1 |
| ubuntu/linux-gcp-4.15 | <4.15.0-1119.133 | 4.15.0-1119.133 |
| ubuntu/linux-gcp-4.15 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.13 | <5.13.0-1021.25~20.04.1 | 5.13.0-1021.25~20.04.1 |
| ubuntu/linux-gcp-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-gcp-5.4 | <5.4.0-1068.72~18.04.1 | 5.4.0-1068.72~18.04.1 |
| ubuntu/linux-gcp-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-gke | <5.4.0-1066.69 | 5.4.0-1066.69 |
| ubuntu/linux-gke | <5.16~ | 5.16~ |
| ubuntu/linux-gke-4.15 | <5.16~ | 5.16~ |
| ubuntu/linux-gke-5.0 | <5.16~ | 5.16~ |
| ubuntu/linux-gke-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-gke-5.4 | <5.4.0-1066.69~18.04.1 | 5.4.0-1066.69~18.04.1 |
| ubuntu/linux-gke-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-gkeop | <5.4.0-1037.38 | 5.4.0-1037.38 |
| ubuntu/linux-gkeop | <5.16~ | 5.16~ |
| ubuntu/linux-gkeop-5.4 | <5.4.0-1037.38~18.04.1 | 5.4.0-1037.38~18.04.1 |
| ubuntu/linux-gkeop-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe | <5.16~ | 5.16~ |
| ubuntu/linux-hwe | <4.15.0-173.182~16.04.1 | 4.15.0-173.182~16.04.1 |
| ubuntu/linux-hwe-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-5.13 | <5.13.0-37.42~20.04.1 | 5.13.0-37.42~20.04.1 |
| ubuntu/linux-hwe-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-5.4 | <5.4.0-105.119~18.04.1 | 5.4.0-105.119~18.04.1 |
| ubuntu/linux-hwe-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-hwe-edge | <5.16~ | 5.16~ |
| ubuntu/linux-ibm | <5.4.0-1018.20 | 5.4.0-1018.20 |
| ubuntu/linux-ibm | <5.16~ | 5.16~ |
| ubuntu/linux-ibm-5.4 | <5.4.0-1018.20~18.04.1 | 5.4.0-1018.20~18.04.1 |
| ubuntu/linux-ibm-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-intel-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-kvm | <4.15.0-1110.113 | 4.15.0-1110.113 |
| ubuntu/linux-kvm | <5.4.0-1059.62 | 5.4.0-1059.62 |
| ubuntu/linux-kvm | <5.13.0-1018.19 | 5.13.0-1018.19 |
| ubuntu/linux-kvm | <5.16~ | 5.16~ |
| ubuntu/linux-lowlatency | <5.16~ | 5.16~ |
| ubuntu/linux-lts-xenial | <5.16~ | 5.16~ |
| ubuntu/linux-oem | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.10 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.14 | <5.14.0-1022.24 | 5.14.0-1022.24 |
| ubuntu/linux-oem-5.17 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-5.6 | <5.16~ | 5.16~ |
| ubuntu/linux-oem-osp1 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle | <4.15.0-1090.99 | 4.15.0-1090.99 |
| ubuntu/linux-oracle | <5.4.0-1067.72 | 5.4.0-1067.72 |
| ubuntu/linux-oracle | <5.13.0-1023.28 | 5.13.0-1023.28 |
| ubuntu/linux-oracle | <5.16~ | 5.16~ |
| ubuntu/linux-oracle | <4.15.0-1090.99~16.04.1 | 4.15.0-1090.99~16.04.1 |
| ubuntu/linux-oracle-5.0 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.13 | <5.13.0-1025.30~20.04.1 | 5.13.0-1025.30~20.04.1 |
| ubuntu/linux-oracle-5.13 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-oracle-5.4 | <5.4.0-1067.72~18.04.1 | 5.4.0-1067.72~18.04.1 |
| ubuntu/linux-raspi | <5.4.0-1056.63 | 5.4.0-1056.63 |
| ubuntu/linux-raspi | <5.13.0-1022.24 | 5.13.0-1022.24 |
| ubuntu/linux-raspi | <5.16~ | 5.16~ |
| ubuntu/linux-raspi-5.4 | <5.4.0-1056.63~18.04.1 | 5.4.0-1056.63~18.04.1 |
| ubuntu/linux-raspi-5.4 | <5.16~ | 5.16~ |
| ubuntu/linux-raspi2 | <4.15.0-1106.113 | 4.15.0-1106.113 |
| ubuntu/linux-raspi2 | <5.16~ | 5.16~ |
| ubuntu/linux-raspi2-5.3 | <5.16~ | 5.16~ |
| ubuntu/linux-riscv | <5.13.0-1017.19 | 5.13.0-1017.19 |
| ubuntu/linux-riscv | <5.16~ | 5.16~ |
| ubuntu/linux-riscv-5.11 | <5.16~ | 5.16~ |
| ubuntu/linux-riscv-5.8 | <5.16~ | 5.16~ |
| ubuntu/linux-snapdragon | <4.15.0-1123.132 | 4.15.0-1123.132 |
| ubuntu/linux-snapdragon | <5.16~ | 5.16~ |
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H300e Firmware | ||
| Netapp H300e | ||
| All of | ||
| Netapp H500e Firmware | ||
| Netapp H500e | ||
| All of | ||
| Netapp H700e Firmware | ||
| Netapp H700e | ||
| All of | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| debian/linux | 4.19.249-2 4.19.304-1 5.10.209-2 5.10.216-1 6.1.76-1 6.1.90-1 6.7.12-1 6.8.9-1 |
Remedy
To mitigate this issue, prevent the modules tee, trusted_tee from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-44733 https://nvd.nist.gov/vuln/detail/CVE-2021-44733 https://lore.kernel.org/lkml/20211214123540.1789434-1-jens.wiklander@linaro.org/
- https://bugzilla.redhat.com/show_bug.cgi?id=2030747
- https://access.redhat.com/errata/RHSA-2022:1975
- https://access.redhat.com/errata/RHSA-2022:1988
- https://access.redhat.com/security/cve/cve-2021-44733
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c
- https://github.com/pjlantz/optee-qemu/blob/main/README.md
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander@linaro.org/
- https://security.netapp.com/advisory/ntap-20220114-0003/
- https://www.debian.org/security/2022/dsa-5096
- https://lore.kernel.org/lkml/20211214123540.1789434-1-jens.wiklander@linaro.org/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2033206
- https://security-tracker.debian.org/tracker/CVE-2021-44733
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
- https://launchpad.net/bugs/cve/CVE-2021-44733
- https://ubuntu.com/security/notices/USN-5278-1
- https://ubuntu.com/security/notices/USN-5337-1
- https://ubuntu.com/security/notices/USN-5338-1
- https://ubuntu.com/security/notices/USN-5339-1
- https://ubuntu.com/security/notices/USN-5368-1
- https://ubuntu.com/security/notices/USN-5377-1
- https://www.cve.org/CVERecord?id=CVE-2021-44733
- https://nvd.nist.gov/vuln/detail/CVE-2021-44733
- https://git.kernel.org/linus/967c9cca2cc50569efc65945325c173cecba83bd
- https://git.kernel.org/linus/dfd0743f1d9ea76931510ed150334d571fbab49d
- https://ubuntu.com/security/CVE-2021-44733
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/weakness
- agent/author
- agent/severity
- agent/remedy
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-44733
- agent/software-canonical-lookup
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
- agent/event
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-api
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.15.11
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/8.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- version/debian debian linux/11.0
- vendor/netapp
- canonical/netapp baseboard management controller h410c firmware
- canonical/netapp baseboard management controller h410c
- canonical/netapp baseboard management controller h300s firmware
- canonical/netapp baseboard management controller h300s
- canonical/netapp baseboard management controller h500s firmware
- canonical/netapp baseboard management controller h500s
- canonical/netapp baseboard management controller h700s firmware
- canonical/netapp baseboard management controller h700s
- canonical/netapp baseboard management controller h300e firmware
- canonical/netapp baseboard management controller h300e
- canonical/netapp baseboard management controller h500e firmware
- canonical/netapp baseboard management controller h500e
- canonical/netapp baseboard management controller h700e firmware
- canonical/netapp baseboard management controller h700e
- canonical/netapp baseboard management controller h410s firmware
- canonical/netapp baseboard management controller h410s
- package-manager/ubuntu
- package-manager/debian
- canonical/netapp h410c firmware
- canonical/netapp h410c
- canonical/netapp h300s firmware
- canonical/netapp h300s
- canonical/netapp h500s firmware
- canonical/netapp h500s
- canonical/netapp h700s firmware
- canonical/netapp h700s
- canonical/netapp h300e firmware
- canonical/netapp h300e
- canonical/netapp h500e firmware
- canonical/netapp h500e
- canonical/netapp h700e firmware
- canonical/netapp h700e
- canonical/netapp h410s firmware
- canonical/netapp h410s