{"cve":"CVE-2024-26752","nvd":{"published":"2024-04-03T17:15:51.910","modified":"2026-06-17T07:18:15.297","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nl2tp: pass correct message length to ip6_append_data\n\nl2tp_ip6_sendmsg needs to avoid accounting for the transport header\ntwice when splicing more data into an already partially-occupied skbuff.\n\nTo manage this, we check whether the skbuff contains data using\nskb_queue_empty when deciding how much data to append using\nip6_append_data.\n\nHowever, the code which performed the calculation was incorrect:\n\n     ulen = len + skb_queue_empty(&sk->sk_write_queue) ? transhdrlen : 0;\n\n...due to C operator precedence, this ends up setting ulen to\ntranshdrlen for messages with a non-zero length, which results in\ncorrupted packets on the wire.\n\nAdd parentheses to correct the calculation in line with the original\nintent.","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":["CWE-131"],"references":["https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d","https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500","https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79","https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae","https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:47:51.568503435+00:00"},"epss":{"cve":"CVE-2024-26752","score":0.00252,"percentile":0.16714,"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."]}