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    CVE-2021-26708

    A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.

    Published:Feb 5, 2021
    Last Modified:Nov 21, 2024
    EPS:Feb 5, 2021
    EPSS Score:0.00939
    CVSS Score:7

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Netapp
    Product
    500f
    Vendor
    Netapp
    Product
    A250
    Vendor
    Netapp
    Product
    Aff Baseboard Management Controller
    Vendor
    Netapp
    Product
    Baseboard Management Controller 500f Firmware
    Vendor
    Netapp
    Product
    Baseboard Management Controller A250 Firmware
    Vendor
    Netapp
    Product
    Cloud Backup
    Vendor
    Netapp
    Product
    Fas Baseboard Management Controller
    Vendor
    Netapp
    Product
    Hci H410c
    Vendor
    Netapp
    Product
    Hci H410c Firmware
    Vendor
    Netapp
    Product
    Solidfire \& Hci Management Node
    Vendor
    Netapp
    Product
    Solidfire Baseboard Management Controller
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    https://github.com/azpema/CVE-2021-26708https://github.com/jordan9001/vsock_pochttps://github.com/kungaocode/vulnerability-analysis-

    Related CVEs

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    CVE-2026-80924 (CVSS 7.5) — In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - use kfree_sensitive() for …
    CVE-2026-80923 — In the Linux kernel, the following vulnerability has been resolved: xhci: dbgtty: Fix unregister on tty_regis…
    CVE-2026-80922 — In the Linux kernel, the following vulnerability has been resolved: crypto: qcom-rng - Allow zero as a random…
    CVE-2026-80921 (CVSS 8.8) — In the Linux kernel, the following vulnerability has been resolved: KVM: s390: vsie: zero stale crypto bits …
    CVE-2026-80920 — In the Linux kernel, the following vulnerability has been resolved: io_uring: defer eventfd signaling when qu…
    CVE-2026-80919 — In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix recursive ww_mutex acquir…
    CVE-2026-80918 — In the Linux kernel, the following vulnerability has been resolved: HID: core: fix number/pointer type confus…
    CVE-2026-80917 — In the Linux kernel, the following vulnerability has been resolved: PCI: host-generic: Fix NULL pointer deref…
    CVE-2026-80916 — In the Linux kernel, the following vulnerability has been resolved: kcov: fix data corruption and race condit…

    References

    http://www.openwall.com/lists/oss-security/2021/02/05/6
    http://www.openwall.com/lists/oss-security/2021/04/09/2
    http://www.openwall.com/lists/oss-security/2022/01/25/14
    https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446
    https://security.netapp.com/advisory/ntap-20210312-0008/
    https://www.openwall.com/lists/oss-security/2021/02/04/5
    http://www.openwall.com/lists/oss-security/2021/02/05/6
    http://www.openwall.com/lists/oss-security/2021/04/09/2
    http://www.openwall.com/lists/oss-security/2022/01/25/14
    https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446
    https://security.netapp.com/advisory/ntap-20210312-0008/
    https://www.openwall.com/lists/oss-security/2021/02/04/5

    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