OESA-2026-4737

    Dashboard / Vulnerabilities / OESA-2026-4737

    OESA-2026-4737

    Published: 4 Nov 2026Last Modified: 4 Nov 2026

    Summary: uboot-tools security update

    Details: This package includes the mkimage program, which allows generation of U-Boot images in various formats, and the fw_printenv and fw_setenv programs to read and modify U-Boot's environment. Security Fix(es): U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_read_reply() function in net/nfs-common.c that allows attackers to corrupt memory by supplying crafted NFS READ reply lengths. A malicious NFS server can exploit signed integer handling to bypass length validation and write far past the destination buffer, crashing the bootloader or corrupting memory.(CVE-2026-74220) U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_readlink_reply() function in net/nfs-common.c when processing NFS server responses. A malicious NFS server can send crafted READLINK replies with negative or oversized symlink length values to corrupt memory and crash the bootloader.(CVE-2026-74221)

    References: https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4737, https://nvd.nist.gov/vuln/detail/CVE-2026-74220, https://nvd.nist.gov/vuln/detail/CVE-2026-74221

    Affected packages

    Package

    Name: uboot-tools

    Purl: pkg:rpm/openEuler/uboot-tools&distro=openEuler-22.03-LTS-SP4

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2021.10-14.oe2203sp4

    Affected versions

    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
    OESA-2026-4737 | CVE-DB