{"id":"CVE-2026-74678","revision":null,"records":[{"revision":"0176fb87bb4d4bddb4d4ac5d0b2b29f3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74678","aliases":[],"title":"net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()\n\nWhen the interface has NETIF_F_SG enabled and skb_linearize() fails in\nax88179_tx_fixup(), the function returns NULL without freeing the skb.\n\nusbnet_start_xmit() treats a NULL return from tx_fixup() as a drop\n(info->flags does not set FLAG_MULTI_PACKET for this driver), jumping\nto the \"drop\" label where it does `if (skb) dev_kfree_skb_any(skb)`.\nBecause tx_fixup() returned NULL, the local skb variable in\nusbnet_start_xmit() is NULL, so the original skb is never freed — a\nmemory leak on every TX frame whose linearization fails (i.e. under\nmemory pressure).\n\nFree the skb before returning, matching the error handling already used\nfor the pskb_expand_head() failure path in the same function.","state":0,"publishedAt":"2026-08-22T15:32:46.765+00:00","modifiedAt":"2026-10-16T19:16:08.884+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/usb/ax88179_178a.c\"\n ],\n \"versions\": [\n {\n \"version\": \"16b1c4e01c89ba07367461e0bc4cb84993c2d027\",\n \"lessThan\": \"83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"16b1c4e01c89ba07367461e0bc4cb84993c2d027\",\n \"lessThan\": \"1c63303659a2264bd55d9813df74cb4caeed5922\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"16b1c4e01c89ba07367461e0bc4cb84993c2d027\",\n \"lessThan\": \"2be5091fa693b9119ad25a8bb8c149d236a23ade\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"16b1c4e01c89ba07367461e0bc4cb84993c2d027\",\n \"lessThan\": \"58733b1dd46bb231d9d279c132a20ee46da1b664\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"16b1c4e01c89ba07367461e0bc4cb84993c2d027\",\n \"lessThan\": \"4039cd807a5a46dc5f7618fffae926b8ad8455eb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"16b1c4e01c89ba07367461e0bc4cb84993c2d027\",\n \"lessThan\": \"1f428e30947395d9b9aacee03e25a4e6cfcad7a4\",\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/usb/ax88179_178a.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.17\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.17\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.183\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.152\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.104\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.45\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.9\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b","https://git.kernel.org/stable/c/1c63303659a2264bd55d9813df74cb4caeed5922","https://git.kernel.org/stable/c/2be5091fa693b9119ad25a8bb8c149d236a23ade","https://git.kernel.org/stable/c/58733b1dd46bb231d9d279c132a20ee46da1b664","https://git.kernel.org/stable/c/4039cd807a5a46dc5f7618fffae926b8ad8455eb","https://git.kernel.org/stable/c/1f428e30947395d9b9aacee03e25a4e6cfcad7a4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74678","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74678","identifiers":["CVE-2026-74678"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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