Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix stride mismatch in mac_phy_caps_parse() Currently, in ath11k_wmi_tlv_mac_phy_caps_parse(), kcalloc() sizes the mac_phy_caps buffer as tot_phy_id * len, where len is clamped to min(firmware_len, sizeof(struct wmi_mac_phy_capabilities)). The subsequent memcpy() destination advances by sizeof(full struct) per slot via C pointer arithmetic, not by the clamped len. When firmware sends short TLVs, the second and later slots are written past the end of the allocation. The reader in ath11k_pull_mac_phy_cap_svc_ready_ext() also indexes the buffer with full-struct pointer arithmetic, so the allocation must match that stride. Fix by using kzalloc_objs(), which derives the element size from the pointer type, making allocation size and pointer stride provably consistent regardless of what len the firmware provides. Compile tested only.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5b90fc760db5a969ed26d70f8e62c91915f012bd before b2ecd548f89a4a6c14b5eb4abc825f92b3068dda; affected 5b90fc760db5a969ed26d70f8e62c91915f012bd before bbb3b3334a9ed850c5b332eedea107796e691237; affected 5b90fc760db5a969ed26d70f8e62c91915f012bd before 75185e2b214e842b7e0af29e5d1fef155662b8b1; affected 5b90fc760db5a969ed26d70f8e62c91915f012bd before acff2713c3212ade15051e7b421f15c89927e70f; affected 5b90fc760db5a969ed26d70f8e62c91915f012bd before 7a246c72132eb943b5844ba79dad597b47429dba |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b2ecd548f89a4a6c14b5eb4abc825f92b3068dda
- https://git.kernel.org/stable/c/bbb3b3334a9ed850c5b332eedea107796e691237
- https://git.kernel.org/stable/c/75185e2b214e842b7e0af29e5d1fef155662b8b1
- https://git.kernel.org/stable/c/acff2713c3212ade15051e7b421f15c89927e70f
- https://git.kernel.org/stable/c/7a246c72132eb943b5844ba79dad597b47429dba