{"id":"CVE-2026-74678","summary":"net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()","details":"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-\u003eflags 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.","modified":"2026-08-27T11:30:30.864778110Z","published":"2026-08-22T15:32:46.765Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74678.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1c63303659a2264bd55d9813df74cb4caeed5922"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1f428e30947395d9b9aacee03e25a4e6cfcad7a4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2be5091fa693b9119ad25a8bb8c149d236a23ade"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4039cd807a5a46dc5f7618fffae926b8ad8455eb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/58733b1dd46bb231d9d279c132a20ee46da1b664"},{"type":"WEB","url":"https://git.kernel.org/stable/c/83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74678.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74678"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"16b1c4e01c89ba07367461e0bc4cb84993c2d027"},{"fixed":"83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b"},{"fixed":"1c63303659a2264bd55d9813df74cb4caeed5922"},{"fixed":"2be5091fa693b9119ad25a8bb8c149d236a23ade"},{"fixed":"58733b1dd46bb231d9d279c132a20ee46da1b664"},{"fixed":"4039cd807a5a46dc5f7618fffae926b8ad8455eb"},{"fixed":"1f428e30947395d9b9aacee03e25a4e6cfcad7a4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74678.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.17.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74678.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}