Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 27291e2165b6de70c476b7b675308113edd69a60 before aef540194effd768bed0bd2e6a74fe135a3d7c3a; affected 27291e2165b6de70c476b7b675308113edd69a60 before 71153d3262517e1c02c3a66aa5094f279b2d1454; affected 27291e2165b6de70c476b7b675308113edd69a60 before fec89d327d9b2b669b5bbdac209386c6317c3722; affected 27291e2165b6de70c476b7b675308113edd69a60 before b94ab9caa5d72c78226121cccff5e33f946da900; affected 27291e2165b6de70c476b7b675308113edd69a60 before beb9c55af609c4c7308259d7191688c75a4e3d4a; affected 27291e2165b6de70c476b7b675308113edd69a60 before 3fe801db90bdeefb0bbdda42d832846b53f64f8a; affected 27291e2165b6de70c476b7b675308113edd69a60 before 4c07680a467e2f7697245bcd11691bffb2a6f0ed |
| Linux / Linux | affected 3.16; unaffected 0 before 3.16; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/aef540194effd768bed0bd2e6a74fe135a3d7c3a
- https://git.kernel.org/stable/c/71153d3262517e1c02c3a66aa5094f279b2d1454
- https://git.kernel.org/stable/c/fec89d327d9b2b669b5bbdac209386c6317c3722
- https://git.kernel.org/stable/c/b94ab9caa5d72c78226121cccff5e33f946da900
- https://git.kernel.org/stable/c/beb9c55af609c4c7308259d7191688c75a4e3d4a
- https://git.kernel.org/stable/c/3fe801db90bdeefb0bbdda42d832846b53f64f8a
- https://git.kernel.org/stable/c/4c07680a467e2f7697245bcd11691bffb2a6f0ed