CVE Feed

    Dashboard / CVE / CVE-2023-6240

    CVE-2023-6240

    A Marvin vulnerability side-channel leakage was found in the RSA decryption operation in the Linux Kernel. This issue may allow a network attacker to decrypt ciphertexts or forge signatures, limiting the services that use that private key.

    Published:Sep 25, 2023
    Last Modified:Nov 8, 2025
    EPS:Feb 4, 2024
    EPSS Score:0.00066
    CVSS Score:6.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-203 Observable Discrepancy

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-189 Black Box Reverse Engineering

    Related CVEs

    CVE-2026-80925 — In the Linux kernel, the following vulnerability has been resolved: vlan: fix skb_under_panic and races when …
    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

    https://access.redhat.com/errata/RHSA-2024:1881
    https://access.redhat.com/errata/RHSA-2024:1882
    https://access.redhat.com/errata/RHSA-2024:2758
    https://access.redhat.com/errata/RHSA-2024:3414
    https://access.redhat.com/errata/RHSA-2024:3421
    https://access.redhat.com/errata/RHSA-2024:3618
    https://access.redhat.com/errata/RHSA-2024:3627
    https://access.redhat.com/security/cve/CVE-2023-6240
    https://bugzilla.redhat.com/show_bug.cgi?id=2250843
    https://people.redhat.com/~hkario/marvin/
    https://securitypitfalls.wordpress.com/2023/10/16/experiment-with-side-channel-attacks-yourself/
    https://access.redhat.com/errata/RHSA-2024:1881
    https://access.redhat.com/errata/RHSA-2024:1882
    https://access.redhat.com/errata/RHSA-2024:2758
    https://access.redhat.com/errata/RHSA-2024:3414
    https://access.redhat.com/errata/RHSA-2024:3421
    https://access.redhat.com/errata/RHSA-2024:3618
    https://access.redhat.com/errata/RHSA-2024:3627
    https://access.redhat.com/security/cve/CVE-2023-6240
    https://bugzilla.redhat.com/show_bug.cgi?id=2250843
    https://people.redhat.com/~hkario/marvin/
    https://security.netapp.com/advisory/ntap-20240628-0002/
    https://securitypitfalls.wordpress.com/2023/10/16/experiment-with-side-channel-attacks-yourself/

    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