CVE-2026-93260
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
40/100
Published: 2026-09-24
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
High
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
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.
Affected Software (7)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 243e25112d06b348f087a6f7aba4bbc288285bdd < 89e1caa5b0aafe23e9938d9a311e9d41baee583e |
| Linux | Linux | 243e25112d06b348f087a6f7aba4bbc288285bdd < e36b1c2eafcaaddefa70d55e6fda74cf6cda38af |
| Linux | Linux | 243e25112d06b348f087a6f7aba4bbc288285bdd < 2ea6238343691309e68308131c7e80c3ae05afea |
| Linux | Linux | 243e25112d06b348f087a6f7aba4bbc288285bdd < 5c9ab0c9cede9f149733d330e2d7d45341b71359 |
| Linux | Linux | 243e25112d06b348f087a6f7aba4bbc288285bdd < c554a8d376d5aea1b237ed6bef6f9fbfc550e67f |
| Linux | Linux | 243e25112d06b348f087a6f7aba4bbc288285bdd < 411a3c016e7a95f5fa105a0587e07d0647a77727 |
| Linux | Linux | 4.12 |