CVE-2026-45851

Katalog CVE

CVSS 7.1 · High EPSS 0,16%

Kerentanan Out-of-bounds Read pada linux kernel. Skor CVSS 3.1 7.1 (High) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: efi: Fix reservation of unaccepted memory table The reserve_unaccepted() function incorrectly calculates the size of the memblock reservation for the unaccepted memory table. It aligns the size of the table, but fails to account for cases where the table's starting physical address (efi.unaccepted) is not page-aligned. If the table starts at an offset within a page and its end crosses into a subsequent page that the aligned size does not cover, the end of the table will not be reserved. This can lead to the table being overwritten or inaccessible, causing a kernel panic in accept_memory(). This issue was observed when starting Intel TDX VMs with specific memory sizes (e.g., > 64GB). Fix this by calculating the end address first (including the unaligned start) and then aligning it up, ensuring the entire range is covered by the reservation.

Rincian

Terbit di NVD

27 Mei 2026

Terakhir diubah

25 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-125: Out-of-bounds Read

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 5,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/0862438c90487e79822d5647f854977d50381505 patch
• https://git.kernel.org/stable/c/9b18bf59977f5c5bc3b11b210520f62500a7adf3 patch
• https://git.kernel.org/stable/c/b7bc182ec1846be437351e44164089d988f9d0dd patch
• https://git.kernel.org/stable/c/ba6b6f1502fa55621d1db23f253d54322bdbe4e0 patch
• https://git.kernel.org/stable/c/e649b5916725c68f44ebf45fb396df563c5dbaf2 patch