{"id":"CVE-2026-74678","aliases":[],"url":"https://o3.security/vulnerability/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->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.","published":"2026-08-22T15:32:46.765Z","modified":"2026-08-24T11:47:20.420473577Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.1.183"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-24T11:47:20.420473577Z"}}