CVE-2026-29009

Katalog CVE

CVSS 9.8 · Critical EPSS 0,74%

Kerentanan Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') pada denx u-boot. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

U-Boot before 2026.07-rc2 contains a buffer overflow vulnerability in nfs_readlink_reply() (net/nfs-common.c) when CONFIG_CMD_NFS is enabled, allowing a malicious or compromised NFS server to overflow the 2048-byte nfs_path_buff buffer by returning multiple relative symlink targets that are appended without cumulative length validation. Attackers can send two or more READLINK responses containing relative symlink targets of approximately 1100 bytes each to corrupt adjacent BSS variables including nfs_server_ip, nfs_server_mount_port, nfs_server_port, nfs_our_port, nfs_state, and rpc_id, potentially achieving memory corruption and control over the NFS client state machine.

Rincian

Terbit di NVD

8 Juli 2026

Terakhir diubah

24 Juli 2026

Status NVD

Modified

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

EPSS (30 hari)

0,74% peluang dieksploitasi; lebih tinggi dari 53,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://lists.denx.de/pipermail/u-boot/2026-May/617853.html mailing list · advisory pihak ketiga
• https://www.vulncheck.com/advisories/u-boot-rc3-buffer-overflow-in-nfs-readlink-reply-via-nfs-readlink exploit · advisory pihak ketiga
• https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/ exploit · advisory pihak ketiga
• https://git.u-boot-project.org/u-boot/u-boot/-/commit/d6694018eaddefac6aae974f9cec72fd6e58f1bc
• https://git.u-boot-project.org/u-boot/u-boot/-/releases/v2026.07-rc2
• https://u-boot.org/ product