Description
In the Linux kernel, the following vulnerability has been resolved:
KVM: s390: Fix old_data leak in guest debug error path
__import_wp_info() allocates a per-watchpoint old_data buffer to back up the original guest memory contents. If a later watchpoint of the same KVM_SET_GUEST_DEBUG request fails to import, kvm_s390_import_bp_data() jumps to the error label, which frees the wp_info array but not the old_data buffers of the entries that were imported successfully. Up to MAX_BP_COUNT - 1 buffers of up to MAX_WP_SIZE bytes are leaked per failed request, and the request can be repeated.
Create error handling for cleaning up all created old_data memory areas.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 27291e2165b6de70c476b7b675308113edd69a60, < 124c81ee610e1fbdd93d4399f88d9e28ba97a941; >= 27291e2165b6de70c476b7b675308113edd69a60, < e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4; >= 27291e2165b6de70c476b7b675308113edd69a60, < c85d402553987777cc4742751437ea5dcbf98a7b; >= 27291e2165b6de70c476b7b675308113edd69a60, < 5fbf319137735252eefa507193c9a619af5b7457; >= 27291e2165b6de70c476b7b675308113edd69a60, < 4048d0a252163084794be3e37995b872c5178913; >= 27291e2165b6de70c476b7b675308113edd69a60, < f55e4d415d95342d5753e528e05a1e8623992c3f; >= 27291e2165b6de70c476b7b675308113edd69a60, < 46cb8a273e2f853f89a78b59dbdff8787b6e1c86; >= 27291e2165b6de70c476b7b675308113edd69a60, < aa9c8e8baf1e765fa65b93212522c636f25d846f |
| Linux | Linux | 3.16 |
References
- https://git.kernel.org/stable/c/124c81ee610e1fbdd93d4399f88d9e28ba97a941
- https://git.kernel.org/stable/c/4048d0a252163084794be3e37995b872c5178913
- https://git.kernel.org/stable/c/46cb8a273e2f853f89a78b59dbdff8787b6e1c86
- https://git.kernel.org/stable/c/5fbf319137735252eefa507193c9a619af5b7457
- https://git.kernel.org/stable/c/aa9c8e8baf1e765fa65b93212522c636f25d846f
- https://git.kernel.org/stable/c/c85d402553987777cc4742751437ea5dcbf98a7b
- https://git.kernel.org/stable/c/e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4
- https://git.kernel.org/stable/c/f55e4d415d95342d5753e528e05a1e8623992c3f
Timeline
- Published
- Sep 16, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received