Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
5b90fc760db5a969ed26d70f8e62c91915f012bd to < deb14c9932509c0defaa0620c9ca8d20b385a6bdaffected5b90fc760db5a969ed26d70f8e62c91915f012bd to < b2ecd548f89a4a6c14b5eb4abc825f92b3068ddaaffected5b90fc760db5a969ed26d70f8e62c91915f012bd to < bbb3b3334a9ed850c5b332eedea107796e691237affected5b90fc760db5a969ed26d70f8e62c91915f012bd to < 75185e2b214e842b7e0af29e5d1fef155662b8b1affected5b90fc760db5a969ed26d70f8e62c91915f012bd to < acff2713c3212ade15051e7b421f15c89927e70faffected5b90fc760db5a969ed26d70f8e62c91915f012bd to < 7a246c72132eb943b5844ba79dad597b47429dbaaffected
Linux Linux
Default version status: affected
5.6affected0 to < 5.6unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/deb14c9932509c0defaa0620c9ca8d20b385a6bd ↗
- 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 ↗