PT-2026-27710 · Linux · Linux Kernel

CVE-2026-23345 · Publicado 2026-01-01 · Atualizado 2026-03-26

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Média

Vetor base

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.0.0-rc1

Description The Linux kernel contains a flaw in the GCS (Global Cache System) mapping when FEAT LPA2 is enabled. Specifically, the code incorrectly sets the PTE SHARED bit on GCS mappings, leading to a kernel panic. This occurs because bits 8-9 of the PTE replace the shareability attribute with bits 50-51 of the output address when FEAT LPA2 is enabled. The issue is triggered when enabling GCS on systems with LPA2, resulting in an 'Unable to handle kernel paging request' error.

Recommendations Update to a version newer than 7.0.0-rc1.

Exploit

Correção

Identificadores relacionados

CVE-2026-23345

Produtos afetados

Linux Kernel

Referências · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23345.json · Exploit
• https://git.kernel.org/stable/c/8a85b3131225a8c8143ba2ae29c0eef8c1f9117f · Correção
• https://twitter.com/CVEnew/status/2036763502551912801 · Publicação no Twitter
• https://git.kernel.org/stable/c/1df3ef7e612d6ccbae5a48e1121553c47c2123d6 · Correção
• https://cve.org/CVERecord?id=CVE-2026-23345 · Nota de Segurança
• https://osv.dev/vulnerability/CVE-2026-23345 · Aviso do Fabricante
• https://security-tracker.debian.org/tracker/CVE-2026-23345 · Aviso do Fabricante
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23345 · Aviso do Fabricante
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-23345 · Nota de Segurança
• https://osv.dev/vulnerability/BELL-CVE-2026-23345 · Aviso do Fabricante
• https://git.kernel.org/stable/c/ca1684dd297bf0725c1d487cff80e615497accf6 · Correção
• https://git.kernel.org/linus/8a85b3131225a8c8143ba2ae29c0eef8c1f9117f · Nota
• https://docs.bell-sw.com/security/cves/CVE-2026-23345 · Nota
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23345 · Aviso do Fabricante