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    CVE-2021-44733

    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.

    Published:Dec 14, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 22, 2021
    EPSS Score:0.00268
    CVSS Score:7

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Netapp
    Product
    H300e
    Vendor
    Netapp
    Product
    H300e Firmware
    Vendor
    Netapp
    Product
    H300s
    Vendor
    Netapp
    Product
    H300s Firmware
    Vendor
    Netapp
    Product
    H410c
    Vendor
    Netapp
    Product
    H410c Firmware
    Vendor
    Netapp
    Product
    H410s
    Vendor
    Netapp
    Product
    H410s Firmware
    Vendor
    Netapp
    Product
    H500e
    Vendor
    Netapp
    Product
    H500e Firmware
    Vendor
    Netapp
    Product
    H500s
    Vendor
    Netapp
    Product
    H500s Firmware
    Vendor
    Netapp
    Product
    H700e
    Vendor
    Netapp
    Product
    H700e Firmware
    Vendor
    Netapp
    Product
    H700s
    Vendor
    Netapp
    Product
    H700s Firmware
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    https://github.com/pjlantz/optee-qemu/blob/main/README.mdhttps://github.com/pjlantz/optee-qemu/blob/main/README.mdhttps://github.com/pjlantz/optee-qemu

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    References

    https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
    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%40linaro.org/
    https://security.netapp.com/advisory/ntap-20220114-0003/
    https://www.debian.org/security/2022/dsa-5096
    https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
    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%40linaro.org/
    https://security.netapp.com/advisory/ntap-20220114-0003/
    https://www.debian.org/security/2022/dsa-5096

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High