CVE-2024-26598: KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache
First published: Fri Feb 23 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.8 | 6.8 |
| Linux kernel | >=5.4<5.4.269 | |
| Linux kernel | >=5.5<5.10.209 | |
| Linux kernel | >=5.11<5.15.148 | |
| Linux kernel | >=5.16<6.1.75 | |
| Linux kernel | >=6.2<6.6.14 | |
| Linux kernel | >=6.7<6.7.2 | |
| Debian | =10.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.17-1 |
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Reference Links
- https://git.kernel.org/stable/c/12c2759ab1343c124ed46ba48f27bd1ef5d2dff4
- https://git.kernel.org/stable/c/65b201bf3e9af1b0254243a5881390eda56f72d1
- https://git.kernel.org/stable/c/ad362fe07fecf0aba839ff2cc59a3617bd42c33f
- https://git.kernel.org/stable/c/ba7be666740847d967822bed15500656b26bc703
- https://git.kernel.org/stable/c/d04acadb6490aa3314f9c9e087691e55de153b88
- https://git.kernel.org/stable/c/dba788e25f05209adf2b0175eb1691dc89fb1ba6
- https://git.kernel.org/stable/c/dd3956a1b3dd11f46488c928cb890d6937d1ca80
- https://launchpad.net/bugs/cve/CVE-2024-26598
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2265813
- https://lore.kernel.org/linux-cve-announce/2024022338-CVE-2024-26598-24f4@gregkh/T/#u
- https://access.redhat.com/security/cve/CVE-2024-26598
- https://access.redhat.com/errata/RHSA-2024:3854
- https://access.redhat.com/errata/RHSA-2024:3855
- https://access.redhat.com/errata/RHSA-2024:4415
- https://access.redhat.com/errata/RHSA-2024:4740
- https://access.redhat.com/errata/RHSA-2024:8161
- https://bugzilla.redhat.com/show_bug.cgi?id=2265801
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26598
- https://nvd.nist.gov/vuln/detail/CVE-2024-26598
- https://security-tracker.debian.org/tracker/CVE-2024-26598
- https://ubuntu.com/security/CVE-2024-26598
- https://git.kernel.org/linus/ad362fe07fecf0aba839ff2cc59a3617bd42c33f
Frequently Asked Questions
What is the severity of CVE-2024-26598?
CVE-2024-26598 has a medium severity due to the potential use-after-free vulnerability in the KVM component of the Linux kernel.
How do I fix CVE-2024-26598?
To fix CVE-2024-26598, upgrade to the patched versions of the kernel available in your distribution, such as kernel version 6.8 or specific Debian packages like 5.10.223-1.
Which operating systems are affected by CVE-2024-26598?
CVE-2024-26598 affects various distributions of Linux, including Red Hat and Debian, across multiple version ranges.
What components are impacted by CVE-2024-26598?
CVE-2024-26598 impacts the KVM component of the Linux kernel, specifically the virtual generic interrupt controller (VGIC) related to large physical interrupt (LPI) translation cache.
When was CVE-2024-26598 reported?
CVE-2024-26598 was reported in 2024 and was resolved shortly thereafter in subsequent kernel updates.
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