{"id":"CVE-2026-98238","title":"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 f…","summary":"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 f…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 05d19bf500f8281f574713479b04679fa226d0a3 < 7c2fe308bda5a7e6222d7f0c3c311991372baab4","Linux >= 05d19bf500f8281f574713479b04679fa226d0a3 < fba45070e25abdae08bcaebfadeef050dc39e208","Linux >= 05d19bf500f8281f574713479b04679fa226d0a3 < e1b0609b1a40da03e385be290853a604eb4c3fb9","Linux >= 05d19bf500f8281f574713479b04679fa226d0a3 < 9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","Linux >= 05d19bf500f8281f574713479b04679fa226d0a3 < d28aa2de9654e8024922775520a2665e00c04ad5","Linux >= 05d19bf500f8281f574713479b04679fa226d0a3 < c7ead9704249d57d4693a04697e3bbd285138fa9","Linux 5.19"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:11.657","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98238","references":[{"url":"https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.434Z","slug":"CVE-2026-98238","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}