Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 27291e2165b6de70c476b7b675308113edd69a60 before 124c81ee610e1fbdd93d4399f88d9e28ba97a941; affected 27291e2165b6de70c476b7b675308113edd69a60 before e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4; affected 27291e2165b6de70c476b7b675308113edd69a60 before c85d402553987777cc4742751437ea5dcbf98a7b; affected 27291e2165b6de70c476b7b675308113edd69a60 before 5fbf319137735252eefa507193c9a619af5b7457; affected 27291e2165b6de70c476b7b675308113edd69a60 before 4048d0a252163084794be3e37995b872c5178913; affected 27291e2165b6de70c476b7b675308113edd69a60 before f55e4d415d95342d5753e528e05a1e8623992c3f; affected 27291e2165b6de70c476b7b675308113edd69a60 before 46cb8a273e2f853f89a78b59dbdff8787b6e1c86; affected 27291e2165b6de70c476b7b675308113edd69a60 before aa9c8e8baf1e765fa65b93212522c636f25d846f |
| Linux / Linux | affected 3.16; unaffected 0 before 3.16; unaffected 5.10.270 through 5.10.*; 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/124c81ee610e1fbdd93d4399f88d9e28ba97a941
- https://git.kernel.org/stable/c/e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4
- https://git.kernel.org/stable/c/c85d402553987777cc4742751437ea5dcbf98a7b
- https://git.kernel.org/stable/c/5fbf319137735252eefa507193c9a619af5b7457
- https://git.kernel.org/stable/c/4048d0a252163084794be3e37995b872c5178913
- https://git.kernel.org/stable/c/f55e4d415d95342d5753e528e05a1e8623992c3f
- https://git.kernel.org/stable/c/46cb8a273e2f853f89a78b59dbdff8787b6e1c86
- https://git.kernel.org/stable/c/aa9c8e8baf1e765fa65b93212522c636f25d846f