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    CVE-2022-30767

    nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has an unbounded memcpy with a failed length check, leading to a buffer overflow. NOTE: this issue exists because of an incorrect fix for CVE-2019-14196.

    Published:May 16, 2022
    Last Modified:Nov 3, 2025
    EPS:May 16, 2022
    EPSS Score:0.00154
    CVSS Score:9.8

    Affected Products

    Vendor
    Denx
    Product
    U-boot
    Vendor
    Fedoraproject
    Product
    Fedora

    Exploits

    https://securitylab.github.com/research/uboot-rce-nfs-vulnerability/https://securitylab.github.com/research/uboot-rce-nfs-vulnerability/

    Related CVEs

    CVE-2025-70293 (CVSS 9.8) — An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability exists in function ex…
    CVE-2026-29009 (CVSS 8.8) — U-Boot before 2026.07-rc2 contains a buffer overflow vulnerability in nfs_readlink_reply() (net/nfs-common.c) …
    CVE-2026-29008 (CVSS 8.7) — U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcp_rx_state_machine() function …
    CVE-2026-29007 (CVSS 6.9) — U-Boot through 2026.04-rc3 contains an out-of-bounds read vulnerability in tcp_rx_state_machine() (net/tcp.c) …
    CVE-2026-46728 (CVSS 8.2) — Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is o…
    CVE-2026-33243 (CVSS 8.2) — barebox is a bootloader. In barebox from version 2016.03.0 to before version 2026.03.1 (and the corresponding …
    CVE-2025-24857 (CVSS 7.6) — Improper access control for volatile memory containing boot code in Universal Boot Loader (U-Boot) before 2017…
    CVE-2025-45512 (CVSS 6.5) — A lack of signature verification in the bootloader of DENX Software Engineering Das U-Boot (U-Boot) v1.1.3 all…
    CVE-2024-57255 (CVSS 7.1) — An integer overflow in sqfs_resolve_symlink in Das U-Boot before 2025.01-rc1 occurs via a crafted squashfs fil…
    CVE-2024-57259 (CVSS 7.1) — sqfs_search_dir in Das U-Boot before 2025.01-rc1 exhibits an off-by-one error and resultant heap memory corrup…

    References

    https://github.com/u-boot/u-boot/commit/5d14ee4e53a81055d34ba280cb8fd90330f22a96
    https://lists.denx.de/pipermail/u-boot/2022-May/483952.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DF62MVMH3QUGMBDCB3DY2ERQ6EBHTADB/
    https://securitylab.github.com/research/uboot-rce-nfs-vulnerability/
    https://source.denx.de/u-boot/u-boot/-/commit/bdbf7a05e26f3c5fd437c99e2755ffde186ddc80
    https://github.com/u-boot/u-boot/commit/5d14ee4e53a81055d34ba280cb8fd90330f22a96
    https://lists.debian.org/debian-lts-announce/2025/05/msg00001.html
    https://lists.denx.de/pipermail/u-boot/2022-May/483952.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DF62MVMH3QUGMBDCB3DY2ERQ6EBHTADB/
    https://securitylab.github.com/research/uboot-rce-nfs-vulnerability/
    https://source.denx.de/u-boot/u-boot/-/commit/bdbf7a05e26f3c5fd437c99e2755ffde186ddc80

    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