{"cve":"CVE-2022-50655","nvd":{"published":"2025-12-09T01:16:48.460","modified":"2026-06-17T05:23:56.543","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nppp: associate skb with a device at tx\n\nSyzkaller triggered flow dissector warning with the following:\n\nr0 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0802, 0x0)\nioctl$PPPIOCNEWUNIT(r0, 0xc004743e, &(0x7f00000000c0))\nioctl$PPPIOCSACTIVE(r0, 0x40107446, &(0x7f0000000240)={0x2, &(0x7f0000000180)=[{0x20, 0x0, 0x0, 0xfffff034}, {0x6}]})\npwritev(r0, &(0x7f0000000040)=[{&(0x7f0000000140)='\\x00!', 0x2}], 0x1, 0x0, 0x0)\n\n[    9.485814] WARNING: CPU: 3 PID: 329 at net/core/flow_dissector.c:1016 __skb_flow_dissect+0x1ee0/0x1fa0\n[    9.485929]  skb_get_poff+0x53/0xa0\n[    9.485937]  bpf_skb_get_pay_offset+0xe/0x20\n[    9.485944]  ? ppp_send_frame+0xc2/0x5b0\n[    9.485949]  ? _raw_spin_unlock_irqrestore+0x40/0x60\n[    9.485958]  ? __ppp_xmit_process+0x7a/0xe0\n[    9.485968]  ? ppp_xmit_process+0x5b/0xb0\n[    9.485974]  ? ppp_write+0x12a/0x190\n[    9.485981]  ? do_iter_write+0x18e/0x2d0\n[    9.485987]  ? __import_iovec+0x30/0x130\n[    9.485997]  ? do_pwritev+0x1b6/0x240\n[    9.486016]  ? trace_hardirqs_on+0x47/0x50\n[    9.486023]  ? __x64_sys_pwritev+0x24/0x30\n[    9.486026]  ? do_syscall_64+0x3d/0x80\n[    9.486031]  ? entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nFlow dissector tries to find skb net namespace either via device\nor via socket. Neigher is set in ppp_send_frame, so let's manually\nuse ppp->dev.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/148dcbd3af039ae39c3af697a3183008c7995805","https://git.kernel.org/stable/c/18dc946360bfe0de016a59e3cc3ee1f450fceb9d","https://git.kernel.org/stable/c/4b8f3b939266c90f03b7cc7e26a4c28c7b64137b","https://git.kernel.org/stable/c/7da524781c531ebaf2f94c9dc4c541b82edecfed","https://git.kernel.org/stable/c/9f225444467b98579cf28d94f4ad053460dfdb84"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2022-50655","score":0.00209,"percentile":0.11133,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}