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    CVE-2025-26597

    A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.

    Published:Feb 25, 2025
    Last Modified:Jun 29, 2026
    EPS:Feb 25, 2025
    EPSS Score:0.00474
    CVSS Score:7.8

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Els
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Tigervnc
    Product
    Tigervnc
    Vendor
    X.org
    Product
    X Server
    Vendor
    X.org
    Product
    Xwayland

    Exploits

    No exploit reference

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    References

    https://access.redhat.com/errata/RHSA-2025:2500
    https://access.redhat.com/errata/RHSA-2025:2502
    https://access.redhat.com/errata/RHSA-2025:2861
    https://access.redhat.com/errata/RHSA-2025:2862
    https://access.redhat.com/errata/RHSA-2025:2865
    https://access.redhat.com/errata/RHSA-2025:2866
    https://access.redhat.com/errata/RHSA-2025:2873
    https://access.redhat.com/errata/RHSA-2025:2874
    https://access.redhat.com/errata/RHSA-2025:2875
    https://access.redhat.com/errata/RHSA-2025:2879
    https://access.redhat.com/errata/RHSA-2025:2880
    https://access.redhat.com/errata/RHSA-2025:3976
    https://access.redhat.com/errata/RHSA-2025:7163
    https://access.redhat.com/errata/RHSA-2025:7165
    https://access.redhat.com/errata/RHSA-2025:7458
    https://access.redhat.com/security/cve/CVE-2025-26597
    https://bugzilla.redhat.com/show_bug.cgi?id=2345255
    http://www.openwall.com/lists/oss-security/2026/06/02/1
    https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html

    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