OESA-2026-4735

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OESA-2026-4735

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-2026-4735, https://nvd.nist.gov/vuln/detail/CVE-2026-74220, https://nvd.nist.gov/vuln/detail/CVE-2026-74221