CVE-2026-45927

Katalog CVE

CVSS 4.7 · Medium EPSS 0,11%

Kerentanan Time-of-check Time-of-use (TOCTOU) Race Condition pada linux kernel. Skor CVSS 3.1 4.7 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: bpf: Require frozen map for calculating map hash Currently, bpf_map_get_info_by_fd calculates and caches the hash of the map regardless of the map's frozen state. This leads to a TOCTOU bug where userspace can call BPF_OBJ_GET_INFO_BY_FD to cache the hash and then modify the map contents before freezing. Therefore, a trusted loader can be tricked into verifying the stale hash while loading the modified contents. Fix this by returning -EPERM if the map is not frozen when the hash is requested. This ensures the hash is only generated for the final, immutable state of the map.

Rincian

Terbit di NVD

27 Mei 2026

Terakhir diubah

25 Juni 2026

Status NVD

Undergoing Analysis

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

EPSS (30 hari)

0,11% peluang dieksploitasi; lebih tinggi dari 1,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/7752d36343862323bbeea4ce3adf0ec2ed86e122 patch
• https://git.kernel.org/stable/c/a2c86aa621c22f2a7e26c654f936d65cfff0aa91 patch
• https://git.kernel.org/stable/c/f415e114b58fe02c41191e47f24bdabb438daf72 patch