Description

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache

There is a potential UAF scenario in the case of an LPI translation
cache hit racing with an operation that invalidates the cache, such
as a DISCARD ITS command. The root of the problem is that
vgic_its_check_cache() does not elevate the refcount on the vgic_irq
before dropping the lock that serializes refcount changes.

Have vgic_its_check_cache() raise the refcount on the returned vgic_irq
and add the corresponding decrement after queueing the interrupt.

Classification

CVE ID: CVE-2024-26598

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.08% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/d04acadb6490aa3314f9c9e087691e55de153b88
https://git.kernel.org/stable/c/ba7be666740847d967822bed15500656b26bc703
https://git.kernel.org/stable/c/12c2759ab1343c124ed46ba48f27bd1ef5d2dff4
https://git.kernel.org/stable/c/dba788e25f05209adf2b0175eb1691dc89fb1ba6
https://git.kernel.org/stable/c/65b201bf3e9af1b0254243a5881390eda56f72d1
https://git.kernel.org/stable/c/dd3956a1b3dd11f46488c928cb890d6937d1ca80
https://git.kernel.org/stable/c/ad362fe07fecf0aba839ff2cc59a3617bd42c33f

Timeline