{"id":"OESA-2026-4844","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.\r\n\r\nSecurity Fix(es):\n\nU-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted IP fragment with non-zero offset and More-Fragments flag set during netboot to corrupt adjacent memory and crash the bootloader.(CVE-2026-71971)\n\nU-Boot through 2026.10-rc5 contains an out-of-bounds write vulnerability in the video_display_rle8_bitmap function in drivers/video/video_bmp.c. Attackers can supply a crafted RLE8-compressed BMP image to corrupt memory adjacent to the framebuffer and crash the bootloader.(CVE-2026-71972)\n\nU-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.(CVE-2026-71973)\n\nU-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)\n\nU-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)","modified":"2026-11-11T12:45:12.272133215Z","published":"2026-11-11T12:26:46Z","upstream":["CVE-2026-71971","CVE-2026-71972","CVE-2026-71973","CVE-2026-74220","CVE-2026-74221"],"database_specific":{"severity":"High"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4844"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71971"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71972"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71973"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74220"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74221"}],"affected":[{"package":{"name":"uboot-tools","ecosystem":"openEuler:24.03-LTS-SP4","purl":"pkg:rpm/openEuler/uboot-tools&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2024.01-7.oe2403sp4"}]}],"ecosystem_specific":{"x86_64":["uboot-tools-2024.01-7.oe2403sp4.x86_64.rpm","uboot-tools-debuginfo-2024.01-7.oe2403sp4.x86_64.rpm","uboot-tools-debugsource-2024.01-7.oe2403sp4.x86_64.rpm"],"aarch64":["uboot-images-elf-2024.01-7.oe2403sp4.aarch64.rpm","uboot-tools-2024.01-7.oe2403sp4.aarch64.rpm","uboot-tools-debuginfo-2024.01-7.oe2403sp4.aarch64.rpm","uboot-tools-debugsource-2024.01-7.oe2403sp4.aarch64.rpm"],"noarch":["uboot-images-armv8-2024.01-7.oe2403sp4.noarch.rpm","uboot-tools-help-2024.01-7.oe2403sp4.noarch.rpm"],"src":["uboot-tools-2024.01-7.oe2403sp4.src.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4844.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}