{"cve":"CVE-2022-48819","nvd":{"published":"2024-07-16T12:15:05.883","modified":"2026-06-17T05:16:16.677","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case\n\nsyzbot found that mixing sendpage() and sendmsg(MSG_ZEROCOPY)\ncalls over the same TCP socket would again trigger the\ninfamous warning in inet_sock_destruct()\n\n\tWARN_ON(sk_forward_alloc_get(sk));\n\nWhile Talal took into account a mix of regular copied data\nand MSG_ZEROCOPY one in the same skb, the sendpage() path\nhas been forgotten.\n\nWe want the charging to happen for sendpage(), because\npages could be coming from a pipe. What is missing is the\ndowngrading of pure zerocopy status to make sure\nsk_forward_alloc will stay synced.\n\nAdd tcp_downgrade_zcopy_pure() helper so that we can\nuse it from the two callers.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/47f3860c4931175f112f28dcac66eacca9b1040f","https://git.kernel.org/stable/c/f8d9d938514f46c4892aff6bfe32f425e84d81cc","https://git.kernel.org/stable/c/47f3860c4931175f112f28dcac66eacca9b1040f","https://git.kernel.org/stable/c/f8d9d938514f46c4892aff6bfe32f425e84d81cc"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:52:42.518321223+00:00"},"epss":{"cve":"CVE-2022-48819","score":0.00231,"percentile":0.14015,"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."]}