{"id":"CVE-2023-53839","state":"PUBLISHED","title":"dccp: fix data-race around dp->dccps_mss_cache","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndccp: fix data-race around dp->dccps_mss_cache\n\ndccp_sendmsg() reads dp->dccps_mss_cache before locking the socket.\nSame thing in do_dccp_getsockopt().\n\nAdd READ_ONCE()/WRITE_ONCE() annotations,\nand change dccp_sendmsg() to check again dccps_mss_cache\nafter socket is locked.","publishedAt":"2025-12-09T01:29:55.540Z","updatedAt":"2026-05-11T19:52:30.888Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"67eebc7a9217f999b779d46fba5312a716f0dc1d","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"6d701c95ee6463abcbb6da543060d6e444554135","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"f239c9e1d98b313435481b4926e8bdd06197e4d8","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"a6ddc1c774874dc704f96a99d015dc759627bba7","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"a47e598fbd8617967e49d85c49c22f9fc642704c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/dccp/output.c","net/dccp/proto.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.14","versionType":"semver"},{"version":"4.14.323","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.292","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.254","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.191","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.127","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.46","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.11","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/dccp/output.c","net/dccp/proto.c"]}],"references":["https://git.kernel.org/stable/c/162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1","https://git.kernel.org/stable/c/2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817","https://git.kernel.org/stable/c/67eebc7a9217f999b779d46fba5312a716f0dc1d","https://git.kernel.org/stable/c/6d701c95ee6463abcbb6da543060d6e444554135","https://git.kernel.org/stable/c/f239c9e1d98b313435481b4926e8bdd06197e4d8","https://git.kernel.org/stable/c/a6ddc1c774874dc704f96a99d015dc759627bba7","https://git.kernel.org/stable/c/d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384","https://git.kernel.org/stable/c/a47e598fbd8617967e49d85c49c22f9fc642704c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53839.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53839","state":"PUBLISHED","datePublished":"2025-12-09T01:29:55.540Z","dateUpdated":"2026-05-11T19:52:30.888Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-09T01:27:17.826Z"},"containers":{"cna":{"title":"dccp: fix data-race around dp->dccps_mss_cache","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndccp: fix data-race around dp->dccps_mss_cache\n\ndccp_sendmsg() reads dp->dccps_mss_cache before locking the socket.\nSame thing in do_dccp_getsockopt().\n\nAdd READ_ONCE()/WRITE_ONCE() annotations,\nand change dccp_sendmsg() to check again dccps_mss_cache\nafter socket is locked."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"67eebc7a9217f999b779d46fba5312a716f0dc1d","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"6d701c95ee6463abcbb6da543060d6e444554135","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"f239c9e1d98b313435481b4926e8bdd06197e4d8","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"a6ddc1c774874dc704f96a99d015dc759627bba7","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384","versionType":"git"},{"version":"7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c","status":"affected","lessThan":"a47e598fbd8617967e49d85c49c22f9fc642704c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/dccp/output.c","net/dccp/proto.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.14","versionType":"semver"},{"version":"4.14.323","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.292","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.254","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.191","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.127","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.46","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.11","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/dccp/output.c","net/dccp/proto.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1"},{"url":"https://git.kernel.org/stable/c/2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817"},{"url":"https://git.kernel.org/stable/c/67eebc7a9217f999b779d46fba5312a716f0dc1d"},{"url":"https://git.kernel.org/stable/c/6d701c95ee6463abcbb6da543060d6e444554135"},{"url":"https://git.kernel.org/stable/c/f239c9e1d98b313435481b4926e8bdd06197e4d8"},{"url":"https://git.kernel.org/stable/c/a6ddc1c774874dc704f96a99d015dc759627bba7"},{"url":"https://git.kernel.org/stable/c/d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384"},{"url":"https://git.kernel.org/stable/c/a47e598fbd8617967e49d85c49c22f9fc642704c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:52:30.888Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"4.14.323"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"4.19.292"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"5.4.254"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"5.10.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"5.15.127"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.1.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.4.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}