{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98238","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.329Z","datePublished":"2026-10-06T08:45:09.953Z","dateUpdated":"2026-10-06T08:45:09.953Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-06T08:45:09.953Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wwan/t7xx/t7xx_netdev.c"],"versions":[{"version":"05d19bf500f8281f574713479b04679fa226d0a3","lessThan":"7c2fe308bda5a7e6222d7f0c3c311991372baab4","status":"affected","versionType":"git"},{"version":"05d19bf500f8281f574713479b04679fa226d0a3","lessThan":"fba45070e25abdae08bcaebfadeef050dc39e208","status":"affected","versionType":"git"},{"version":"05d19bf500f8281f574713479b04679fa226d0a3","lessThan":"e1b0609b1a40da03e385be290853a604eb4c3fb9","status":"affected","versionType":"git"},{"version":"05d19bf500f8281f574713479b04679fa226d0a3","lessThan":"9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad","status":"affected","versionType":"git"},{"version":"05d19bf500f8281f574713479b04679fa226d0a3","lessThan":"d28aa2de9654e8024922775520a2665e00c04ad5","status":"affected","versionType":"git"},{"version":"05d19bf500f8281f574713479b04679fa226d0a3","lessThan":"c7ead9704249d57d4693a04697e3bbd285138fa9","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wwan/t7xx/t7xx_netdev.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc4","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.3-rc4"}]}]}],"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"}}}}