CVE-2026-89926
CVE CVE-2026-89926EUVD EUVD-2026-80526Published 2026-09-16T10:32:18.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix length check __import_wp_info() struct kvm_hw_breakpoint::len is a __u64 that is fully controlled by user space. This is then assigned to wp_info->len, which is an int. The bounds check is done on the truncated value while the allocation uses the untruncated one: wp_info->len = bp_data->len; [...] if (wp_info->len < 0 || wp_info->len > MAX_WP_SIZE) return -EINVAL; wp_info->old_data = kmalloc(bp_data->len, GFP_KERNEL_ACCOUNT); Use the validated value for the allocation as intended. Without this fix userspace can trigger >4GB allocations which will fail and result in a WARN due to MAX_PAGE_ORDER.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 27291e2165b6de70c476b7b675308113edd69a60 <3fe801db90bdeefb0bbdda42d832846b53f64f8a; 27291e2165b6de70c476b7b675308113edd69a60 <b94ab9caa5d72c78226121cccff5e33f946da900; 27291e2165b6de70c476b7b675308113edd69a60 <aef540194effd768bed0bd2e6a74fe135a3d7c3a; patch: 6.6.157; patch: 7.2.5; patch: 7.3-rc1; 3.16; patch: 6.18.51; 27291e2165b6de70c476b7b675308113edd69a60 <fec89d327d9b2b669b5bbdac209386c6317c3722; 27291e2165b6de70c476b7b675308113edd69a60 <beb9c55af609c4c7308259d7191688c75a4e3d4a; patch: 5.15.221; 27291e2165b6de70c476b7b675308113edd69a60 <4c07680a467e2f7697245bcd11691bffb2a6f0ed; patch: 6.1.188; patch: 0; 27291e2165b6de70c476b7b675308113edd69a60 <71153d3262517e1c02c3a66aa5094f279b2d1454; patch: 6.12.110
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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