CVE-2026-53248: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: net: airoha: Fix use-after-free in metadata dst teardown airoha_metadata_dst_free() runs metadata_dst_free() which frees the metadata_dst with kfree() immediately, bypassing the RCU grace period. In the RX path, skb_dst_set_noref() sets a non-refcounted pointer from the skb to the metadata_dst. This function requires RCU read-side protection and the dst must remain valid until all RCU readers complete. Since metadata_dst_free() calls kfree() directly, an use-after-free can occur if any skb still holds a noref pointer to the dst when the driver tears it down. Replace metadata_dst_free() with dst_release() which properly goes through the refcount path: when the refcount drops to zero, it schedules the actual free via call_rcu_hurry(), ensuring all RCU readers have completed before the memory is freed.

Засегнати продукти

• Linux Linux: af3cf757d5c99011b9b94ea8d78aeaccc0153fdc преди 6f829e2c17a53a35321268339cd252aff6d6d723; af3cf757d5c99011b9b94ea8d78aeaccc0153fdc преди 4b5a574e033e66d2131eff1c18feef8d8643c67e; af3cf757d5c99011b9b94ea8d78aeaccc0153fdc преди b38cae85d1c45ff189d7ecb6ac36f41cdc3d84d0
• Linux Linux: 6.15; преди 6.15; 6.18.36 до 6.18.*; 7.0.13 до 7.0.*; от 7.1 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-53248
• https://nvd.nist.gov/vuln/detail/CVE-2026-53248
• https://git.kernel.org/stable/c/6f829e2c17a53a35321268339cd252aff6d6d723
• https://git.kernel.org/stable/c/4b5a574e033e66d2131eff1c18feef8d8643c67e
• https://git.kernel.org/stable/c/b38cae85d1c45ff189d7ecb6ac36f41cdc3d84d0