{"id":"CVE-2026-98238","revision":"5501b2ce5f1247df9182e92afb52fc5b","records":[{"revision":"5501b2ce5f1247df9182e92afb52fc5b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98238","aliases":[],"title":"net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()","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.","state":0,"publishedAt":"2026-10-06T08:45:09.953+00:00","modifiedAt":"2026-10-19T09:16:09.924+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/wwan/t7xx/t7xx_netdev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"05d19bf500f8281f574713479b04679fa226d0a3\",\n                            \"lessThan\": \"7c2fe308bda5a7e6222d7f0c3c311991372baab4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"05d19bf500f8281f574713479b04679fa226d0a3\",\n                            \"lessThan\": \"fba45070e25abdae08bcaebfadeef050dc39e208\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"05d19bf500f8281f574713479b04679fa226d0a3\",\n                            \"lessThan\": \"e1b0609b1a40da03e385be290853a604eb4c3fb9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"05d19bf500f8281f574713479b04679fa226d0a3\",\n                            \"lessThan\": \"9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"05d19bf500f8281f574713479b04679fa226d0a3\",\n                            \"lessThan\": \"d28aa2de9654e8024922775520a2665e00c04ad5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"05d19bf500f8281f574713479b04679fa226d0a3\",\n                            \"lessThan\": \"c7ead9704249d57d4693a04697e3bbd285138fa9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/wwan/t7xx/t7xx_netdev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4","https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208","https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9","https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5","https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98238","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98238","identifiers":["CVE-2026-98238"]},"retained":false,"historicalAffected":[]}],"coverage":[]}