CVE-2022-49731: ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-26 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo() In an unlikely (and probably wrong?) case that the 'ppi' parameter of ata_host_alloc_pinfo() points to an array starting with a NULL pointer, there's going to be a kernel oops as the 'pi' local variable won't get reassigned from the initial value of NULL. Initialize 'pi' instead to '&ata_dummy_port_info' to fix the possible kernel oops for good... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.

Affected products

Linux kernel: before 4.9.320; from 4.10 before 4.14.285; from 4.15 before 4.19.249; from 4.20 before 5.4.200; from 5.5 before 5.10.124; from 5.11 before 5.15.49 — fixed in 4.14.285, 4.19.249, 4.9.320, 5.10.124, 5.15.49, 5.18.6

How to fix

Upgrade to a fixed version: Linux kernel 4.14.285, 4.19.249, 4.9.320, 5.10.124. Check the vendor advisory for mitigations.

References

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