{"id":"CVE-2026-98238","published":"2026-10-06T09:18:11.657","lastModified":"2026-10-06T09:18:11.657","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()\n\nThe netif index carried in the DPMAIF PIT header is five bits wide,\nbut ccmni_inst[] only has room for NIC_DEV_MAX (21) entries.\nt7xx_ccmni_recv_skb() indexes the array without a bounds check, so\nindexes 21 to 31 read past it.  The out-of-bounds value lands in the\ncallback table that follows the array, which is never NULL, so the\nexisting !ccmni check does not catch it and the driver dereferences\nwhatever sits there as a struct t7xx_ccmni.\n\nDrop the skb when the index is out of range.\n\n\nVerified in a QEMU guest with a fault injector setting the netif\nindex to 25: the unpatched driver reads a value past ccmni_inst[],\nwhich lands in the callback table, and dereferences it far enough to\nqueue the skb.  With this check the packet is dropped.  Well-formed\ntraffic on index 0 is unaffected.\n\nChanges in v2: none.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4","tags":[]},{"url":"https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","tags":[]},{"url":"https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9","tags":[]},{"url":"https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5","tags":[]},{"url":"https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9","tags":[]},{"url":"https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}