CVE-2024-35847: irqchip/gic-v3-its: Prevent double free on error

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-17 · updated 2026-08-04
Weakness: CWE-415

Description

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Prevent double free on error The error handling path in its_vpe_irq_domain_alloc() causes a double free when its_vpe_init() fails after successfully allocating at least one interrupt. This happens because its_vpe_irq_domain_free() frees the interrupts along with the area bitmap and the vprop_page and its_vpe_irq_domain_alloc() subsequently frees the area bitmap and the vprop_page again. Fix this by unconditionally invoking its_vpe_irq_domain_free() which handles all cases correctly and by removing the bitmap/vprop_page freeing from its_vpe_irq_domain_alloc(). [ tglx: Massaged change log ]

Affected products

Debian Linux: 10.0
Linux kernel: from 4.14 before 4.19.313; from 4.20 before 5.4.275; from 5.5 before 5.10.216; from 5.11 before 5.15.158; from 5.16 before 6.1.90; from 6.2 before 6.6.30 — fixed in 4.19.313, 5.10.216, 5.15.158, 5.4.275, 6.1.90, 6.6.30

How to fix

Upgrade to a fixed version: Linux kernel 4.19.313, 5.10.216, 5.15.158, 5.4.275. Check the vendor advisory for mitigations.

References

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