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    CVE-2023-3812

    An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.

    Published:Oct 22, 2022
    Last Modified:Feb 26, 2026
    EPS:Jul 24, 2023
    EPSS Score:0.00008
    CVSS Score:7.8

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Redhat
    Product
    Rhev Hypervisor

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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…
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    References

    https://access.redhat.com/errata/RHSA-2023:6799
    https://access.redhat.com/errata/RHSA-2023:6813
    https://access.redhat.com/errata/RHSA-2023:7370
    https://access.redhat.com/errata/RHSA-2023:7379
    https://access.redhat.com/errata/RHSA-2023:7382
    https://access.redhat.com/errata/RHSA-2023:7389
    https://access.redhat.com/errata/RHSA-2023:7411
    https://access.redhat.com/errata/RHSA-2023:7418
    https://access.redhat.com/errata/RHSA-2023:7548
    https://access.redhat.com/errata/RHSA-2023:7549
    https://access.redhat.com/errata/RHSA-2023:7554
    https://access.redhat.com/errata/RHSA-2024:0340
    https://access.redhat.com/errata/RHSA-2024:0378
    https://access.redhat.com/errata/RHSA-2024:0412
    https://access.redhat.com/errata/RHSA-2024:0461
    https://access.redhat.com/errata/RHSA-2024:0554
    https://access.redhat.com/errata/RHSA-2024:0562
    https://access.redhat.com/errata/RHSA-2024:0563
    https://access.redhat.com/errata/RHSA-2024:0575
    https://access.redhat.com/errata/RHSA-2024:0593
    https://access.redhat.com/errata/RHSA-2024:1961
    https://access.redhat.com/errata/RHSA-2024:2006
    https://access.redhat.com/errata/RHSA-2024:2008
    https://access.redhat.com/security/cve/CVE-2023-3812
    https://bugzilla.redhat.com/show_bug.cgi?id=2224048
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=363a5328f4b0
    https://access.redhat.com/errata/RHSA-2023:6799
    https://access.redhat.com/errata/RHSA-2023:6813
    https://access.redhat.com/errata/RHSA-2023:7370
    https://access.redhat.com/errata/RHSA-2023:7379
    https://access.redhat.com/errata/RHSA-2023:7382
    https://access.redhat.com/errata/RHSA-2023:7389
    https://access.redhat.com/errata/RHSA-2023:7411
    https://access.redhat.com/errata/RHSA-2023:7418
    https://access.redhat.com/errata/RHSA-2023:7548
    https://access.redhat.com/errata/RHSA-2023:7549
    https://access.redhat.com/errata/RHSA-2023:7554
    https://access.redhat.com/errata/RHSA-2024:0340
    https://access.redhat.com/errata/RHSA-2024:0378
    https://access.redhat.com/errata/RHSA-2024:0412
    https://access.redhat.com/errata/RHSA-2024:0461
    https://access.redhat.com/errata/RHSA-2024:0554
    https://access.redhat.com/errata/RHSA-2024:0562
    https://access.redhat.com/errata/RHSA-2024:0563
    https://access.redhat.com/errata/RHSA-2024:0575
    https://access.redhat.com/errata/RHSA-2024:0593
    https://access.redhat.com/errata/RHSA-2024:1961
    https://access.redhat.com/errata/RHSA-2024:2006
    https://access.redhat.com/errata/RHSA-2024:2008
    https://access.redhat.com/security/cve/CVE-2023-3812
    https://bugzilla.redhat.com/show_bug.cgi?id=2224048
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=363a5328f4b0

    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