What’s Vulnerable › Vulnerabilities

CVE-2026-43148: powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/smp: Add check for kcalloc() failure in parse_thread_groups() As kcalloc() may fail, check its return value to avoid a NULL pointer dereference when passing it to of_property_read_u32_array().

Affected products

• Linux kernel: from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6 — fixed in 5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6, 6.6.128

How to fix

Upgrade to a fixed version: Linux kernel 5.15.202, 6.1.165, 6.12.75, 6.18.16. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1de31dba19c3cd0c1caf388a286b46df638f0b91
• https://git.kernel.org/stable/c/33c1c6d8a28a2761ac74b0380b2563cf546c2a3a
• https://git.kernel.org/stable/c/8b221db0b7d24675e465e98d9326d298025a4e8d
• https://git.kernel.org/stable/c/9b85c8f624b0f8cf9b932f5a65dacd56a1f47a72
• https://git.kernel.org/stable/c/9d0ca11258e7b452653d04310addfec1753de1a2
• https://git.kernel.org/stable/c/b265e53d9adfbb5751713185843f7188aa9dd066
• https://git.kernel.org/stable/c/ca46d2092f307385a7acfb42632056570d6dbbbc

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