CVE-2023-0045

Katalog CVE

CVSS 7.5 · High EPSS 2,4%

Kerentanan Externally Controlled Reference to a Resource in Another Sphere pada linux kernel, debian linux +6 lainnya. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set  function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall.  The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96

Rincian

Terbit di NVD

25 April 2023

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-610: Externally Controlled Reference to a Resource in Another Sphere

EPSS (30 hari)

2,4% peluang dieksploitasi; lebih tinggi dari 83,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96 mailing list · patch
• https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8 exploit · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html mailing list · advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20230714-0001/ advisory pihak ketiga