{"api_version":"1","generated_at":"2026-10-23T07:25:11+00:00","cve":"CVE-2026-98238","urls":{"html":"https://cve.report/CVE-2026-98238","api":"https://cve.report/api/cve/CVE-2026-98238.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98238","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98238"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:11","updated_at":"2026-10-19 10:18:24"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9","name":"https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208","name":"https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9","name":"https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","name":"https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4","name":"https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5","name":"https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98238","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98238","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05d19bf500f8281f574713479b04679fa226d0a3 7c2fe308bda5a7e6222d7f0c3c311991372baab4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05d19bf500f8281f574713479b04679fa226d0a3 fba45070e25abdae08bcaebfadeef050dc39e208 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05d19bf500f8281f574713479b04679fa226d0a3 e1b0609b1a40da03e385be290853a604eb4c3fb9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05d19bf500f8281f574713479b04679fa226d0a3 9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05d19bf500f8281f574713479b04679fa226d0a3 d28aa2de9654e8024922775520a2665e00c04ad5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05d19bf500f8281f574713479b04679fa226d0a3 c7ead9704249d57d4693a04697e3bbd285138fa9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98238","cve":"CVE-2026-98238","epss":"0.001800000","percentile":"0.069200000","score_date":"2026-10-06","updated_at":"2026-10-07 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wwan/t7xx/t7xx_netdev.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7c2fe308bda5a7e6222d7f0c3c311991372baab4","status":"affected","version":"05d19bf500f8281f574713479b04679fa226d0a3","versionType":"git"},{"lessThan":"fba45070e25abdae08bcaebfadeef050dc39e208","status":"affected","version":"05d19bf500f8281f574713479b04679fa226d0a3","versionType":"git"},{"lessThan":"e1b0609b1a40da03e385be290853a604eb4c3fb9","status":"affected","version":"05d19bf500f8281f574713479b04679fa226d0a3","versionType":"git"},{"lessThan":"9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","status":"affected","version":"05d19bf500f8281f574713479b04679fa226d0a3","versionType":"git"},{"lessThan":"d28aa2de9654e8024922775520a2665e00c04ad5","status":"affected","version":"05d19bf500f8281f574713479b04679fa226d0a3","versionType":"git"},{"lessThan":"c7ead9704249d57d4693a04697e3bbd285138fa9","status":"affected","version":"05d19bf500f8281f574713479b04679fa226d0a3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wwan/t7xx/t7xx_netdev.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.54","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"5.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:16:09.924Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4"},{"url":"https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208"},{"url":"https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9"},{"url":"https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad"},{"url":"https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5"},{"url":"https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9"}],"title":"net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98238","datePublished":"2026-10-06T08:45:09.953Z","dateReserved":"2026-09-25T10:25:14.329Z","dateUpdated":"2026-10-19T09:16:09.924Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:11","lastModifiedDate":"2026-10-19 10:18:24","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98238","Ordinal":"1","Title":"net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb","CVE":"CVE-2026-98238","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98238","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb"}]}}}