CVE-2026-93260
Açıklama (NVD)
In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: propagate IPI init errors to prevent use-after-free When xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails), the error path frees the global xive_ipis array. However, xive_smp_probe() previously ignored this failure and proceeded to call xive_setup_cpu_ipi(), which dereferences the already-freed xive_ipis pointer -- a use-after-free. Now that xive_smp_probe() returns int (previous patch), propagate the error from xive_init_ipis() and xive_setup_cpu_ipi() through xive_smp_probe(). Check the return value in both pnv_smp_probe() and pSeries_smp_probe() so that IPI setup is aborted cleanly on failure, avoiding the use-after-free.
Yayın: 24.09.2026 · Son değişiklik: 30.10.2026
CVSS 3.1 metrikleri
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
| Saldırı vektörü | Yerel |
| Karmaşıklık | Yüksek |
| Gereken yetki | Yok |
| Kullanıcı etkileşimi | Gerekmez |
| Kapsam | Değişmez |
| Gizlilik | Yüksek |
| Bütünlük | Yüksek |
| Erişilebilirlik | Yüksek |
Hesaplanan temel puan: 7.4. CVSS hesaplayıcıda incele
Referanslar
- https://git.kernel.org/stable/c/2ea6238343691309e68308131c7e80c3ae05afea
- https://git.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727
- https://git.kernel.org/stable/c/5c9ab0c9cede9f149733d330e2d7d45341b71359
- https://git.kernel.org/stable/c/89e1caa5b0aafe23e9938d9a311e9d41baee583e
- https://git.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67f
- https://git.kernel.org/stable/c/e36b1c2eafcaaddefa70d55e6fda74cf6cda38af