{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47249","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-04-10T18:59:19.536Z","datePublished":"2024-05-21T14:19:46.238Z","dateUpdated":"2025-05-04T07:07:07.809Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:07:07.809Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rds: fix memory leak in rds_recvmsg\n\nSyzbot reported memory leak in rds. The problem\nwas in unputted refcount in case of error.\n\nint rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,\n\t\tint msg_flags)\n{\n...\n\n\tif (!rds_next_incoming(rs, &inc)) {\n\t\t...\n\t}\n\nAfter this \"if\" inc refcount incremented and\n\n\tif (rds_cmsg_recv(inc, msg, rs)) {\n\t\tret = -EFAULT;\n\t\tgoto out;\n\t}\n...\nout:\n\treturn ret;\n}\n\nin case of rds_cmsg_recv() fail the refcount won't be\ndecremented. And it's easy to see from ftrace log, that\nrds_inc_addref() don't have rds_inc_put() pair in\nrds_recvmsg() after rds_cmsg_recv()\n\n 1)               |  rds_recvmsg() {\n 1)   3.721 us    |    rds_inc_addref();\n 1)   3.853 us    |    rds_message_inc_copy_to_user();\n 1) + 10.395 us   |    rds_cmsg_recv();\n 1) + 34.260 us   |  }"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rds/recv.c"],"versions":[{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"8c3ec88b03e9e4ca117dcdc4204fd3edcd02084f","status":"affected","versionType":"git"},{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"423c6939758fb3b9cf5abbd1e7792068a5c4ae8c","status":"affected","versionType":"git"},{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"1f79bc8ae81c05eb112a53f981cb2c244ee50d02","status":"affected","versionType":"git"},{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"06b7cb0194bd1ede0dd27f3a946e7c0279fba44a","status":"affected","versionType":"git"},{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"2038cd15eacdf7512755c27686822e0052eb9042","status":"affected","versionType":"git"},{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"5946fbf48355f5a8caeff72580c7658da5966b86","status":"affected","versionType":"git"},{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"b25b60d076164edb3025e85aabd2cf50a5215b91","status":"affected","versionType":"git"},{"version":"bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb","lessThan":"49bfcbfd989a8f1f23e705759a6bb099de2cff9f","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/rds/recv.c"],"versions":[{"version":"2.6.30","status":"affected"},{"version":"0","lessThan":"2.6.30","status":"unaffected","versionType":"semver"},{"version":"4.4.274","lessThanOrEqual":"4.4.*","status":"unaffected","versionType":"semver"},{"version":"4.9.274","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.238","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.196","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.128","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.46","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.12.13","lessThanOrEqual":"5.12.*","status":"unaffected","versionType":"semver"},{"version":"5.13","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":"2.6.30","versionEndExcluding":"4.4.274"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"4.9.274"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"4.14.238"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"4.19.196"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.4.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.10.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.12.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8c3ec88b03e9e4ca117dcdc4204fd3edcd02084f"},{"url":"https://git.kernel.org/stable/c/423c6939758fb3b9cf5abbd1e7792068a5c4ae8c"},{"url":"https://git.kernel.org/stable/c/1f79bc8ae81c05eb112a53f981cb2c244ee50d02"},{"url":"https://git.kernel.org/stable/c/06b7cb0194bd1ede0dd27f3a946e7c0279fba44a"},{"url":"https://git.kernel.org/stable/c/2038cd15eacdf7512755c27686822e0052eb9042"},{"url":"https://git.kernel.org/stable/c/5946fbf48355f5a8caeff72580c7658da5966b86"},{"url":"https://git.kernel.org/stable/c/b25b60d076164edb3025e85aabd2cf50a5215b91"},{"url":"https://git.kernel.org/stable/c/49bfcbfd989a8f1f23e705759a6bb099de2cff9f"}],"title":"net: rds: fix memory leak in rds_recvmsg","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47249","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-23T21:22:20.748261Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:13:47.884Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:32:07.936Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/8c3ec88b03e9e4ca117dcdc4204fd3edcd02084f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/423c6939758fb3b9cf5abbd1e7792068a5c4ae8c","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/1f79bc8ae81c05eb112a53f981cb2c244ee50d02","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/06b7cb0194bd1ede0dd27f3a946e7c0279fba44a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/2038cd15eacdf7512755c27686822e0052eb9042","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/5946fbf48355f5a8caeff72580c7658da5966b86","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/b25b60d076164edb3025e85aabd2cf50a5215b91","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/49bfcbfd989a8f1f23e705759a6bb099de2cff9f","tags":["x_transferred"]}]}]}}