{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53669","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-10-07T15:16:59.663Z","datePublished":"2025-10-07T15:21:26.896Z","dateUpdated":"2026-05-11T19:49:37.595Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:49:37.595Z"},"descriptions":[{"lang":"en","value":"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/skbuff.c"],"versions":[{"version":"7c4e983c4f3cf94fcd879730c6caa877e0768a4d","lessThan":"7fa93e39fbb0566019c388a8038a4d58552e0910","status":"affected","versionType":"git"},{"version":"7c4e983c4f3cf94fcd879730c6caa877e0768a4d","lessThan":"3c77a377877acbaf03cd7caa21d3644a5dd16301","status":"affected","versionType":"git"},{"version":"7c4e983c4f3cf94fcd879730c6caa877e0768a4d","lessThan":"9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f","status":"affected","versionType":"git"},{"version":"7c4e983c4f3cf94fcd879730c6caa877e0768a4d","lessThan":"7e692df3933628d974acb9f5b334d2b3e885e2a6","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/skbuff.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.1.29","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.16","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3.3","lessThanOrEqual":"6.3.*","status":"unaffected","versionType":"semver"},{"version":"6.4","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.29"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.2.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.3.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.4"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/7fa93e39fbb0566019c388a8038a4d58552e0910"},{"url":"https://git.kernel.org/stable/c/3c77a377877acbaf03cd7caa21d3644a5dd16301"},{"url":"https://git.kernel.org/stable/c/9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f"},{"url":"https://git.kernel.org/stable/c/7e692df3933628d974acb9f5b334d2b3e885e2a6"}],"title":"tcp: fix skb_copy_ubufs() vs BIG TCP","x_generator":{"engine":"bippy-1.2.0"}}}}