{"id":"CVE-2023-53669","revision":"ac3159d07a504d7d9f5f1a5dcd23edf2","records":[{"revision":"ac3159d07a504d7d9f5f1a5dcd23edf2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53669","aliases":[],"title":"tcp: fix skb_copy_ubufs() vs BIG TCP","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix skb_copy_ubufs() vs BIG TCP\n\nDavid Ahern reported crashes in skb_copy_ubufs() caused by TCP tx zerocopy\nusing hugepages, and skb length bigger than ~68 KB.\n\nskb_copy_ubufs() assumed it could copy all payload using up to\nMAX_SKB_FRAGS order-0 pages.\n\nThis assumption broke when BIG TCP was able to put up to 512 KB per skb.\n\nWe did not hit this bug at Google because we use CONFIG_MAX_SKB_FRAGS=45\nand limit gso_max_size to 180000.\n\nA solution is to use higher order pages if needed.\n\nv2: add missing __GFP_COMP, or we leak memory.","state":0,"publishedAt":"2025-10-07T15:21:26.896+00:00","modifiedAt":"2026-10-15T21:41:32.929+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/skbuff.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7c4e983c4f3cf94fcd879730c6caa877e0768a4d\",\n                            \"lessThan\": \"7fa93e39fbb0566019c388a8038a4d58552e0910\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c4e983c4f3cf94fcd879730c6caa877e0768a4d\",\n                            \"lessThan\": \"3c77a377877acbaf03cd7caa21d3644a5dd16301\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c4e983c4f3cf94fcd879730c6caa877e0768a4d\",\n                            \"lessThan\": \"9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c4e983c4f3cf94fcd879730c6caa877e0768a4d\",\n                            \"lessThan\": \"7e692df3933628d974acb9f5b334d2b3e885e2a6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/skbuff.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.29\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.2.16\",\n                            \"lessThanOrEqual\": \"6.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.3.3\",\n                            \"lessThanOrEqual\": \"6.3.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/7fa93e39fbb0566019c388a8038a4d58552e0910","https://git.kernel.org/stable/c/3c77a377877acbaf03cd7caa21d3644a5dd16301","https://git.kernel.org/stable/c/9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f","https://git.kernel.org/stable/c/7e692df3933628d974acb9f5b334d2b3e885e2a6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53669","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53669","identifiers":["CVE-2023-53669"]},"retained":false,"historicalAffected":[]}],"coverage":[]}