{"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": "2024-11-04T12:02:17.094Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:02:17.094Z"}, "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": "bdbe6fbc6a2f", "lessThan": "8c3ec88b03e9", "status": "affected", "versionType": "git"}, {"version": "bdbe6fbc6a2f", "lessThan": "423c6939758f", "status": "affected", "versionType": "git"}, {"version": "bdbe6fbc6a2f", "lessThan": "1f79bc8ae81c", "status": "affected", "versionType": "git"}, {"version": "bdbe6fbc6a2f", "lessThan": "06b7cb0194bd", "status": "affected", "versionType": "git"}, {"version": "bdbe6fbc6a2f", "lessThan": "2038cd15eacd", "status": "affected", "versionType": "git"}, {"version": "bdbe6fbc6a2f", "lessThan": "5946fbf48355", "status": "affected", "versionType": "git"}, {"version": "bdbe6fbc6a2f", "lessThan": "b25b60d07616", "status": "affected", "versionType": "git"}, {"version": "bdbe6fbc6a2f", "lessThan": "49bfcbfd989a", "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"}]}], "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-9e1c9544281a"}}, "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"]}]}]}}

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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 | }"}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T11:37:35.230Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47249", "state": "PUBLISHED", "dateUpdated": "2024-11-04T11:37:35.230Z", "dateReserved": "2024-04-10T18:59:19.536Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T14:19:46.238Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "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 | }"}, {"lang": "es", "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: net:rds: corrige p\u00e9rdida de memoria en rds_recvmsg. Syzbot inform\u00f3 p\u00e9rdida de memoria en rds. El problema estaba en el recuento no puesto en caso de error. int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int msg_flags) { ... if (!rds_next_incoming(rs, &inc)) { ... } Despu\u00e9s de esto \"if\" inc refcount incrementado y if (rds_cmsg_recv (inc, mensaje, rs)) { ret = -EFAULT; salir; } ... fuera: devolver ret; } en caso de que rds_cmsg_recv() falle, el recuento no disminuir\u00e1. Y es f\u00e1cil ver en el registro de ftrace que rds_inc_addref() no tiene el par rds_inc_put() en rds_recvmsg() despu\u00e9s de rds_cmsg_recv() 1) | rds_recvmsg() { 1) 3.721 us| rds_inc_addref(); 1) 3.853 us| rds_message_inc_copy_to_user(); 1) + 10.395 us| rds_cmsg_recv(); 1) + 34.260 us| }"}], "id": "CVE-2021-47249", "lastModified": "2024-05-21T16:54:26.047", "metrics": {}, "published": "2024-05-21T15:15:13.857", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06b7cb0194bd1ede0dd27f3a946e7c0279fba44a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f79bc8ae81c05eb112a53f981cb2c244ee50d02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2038cd15eacdf7512755c27686822e0052eb9042"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/423c6939758fb3b9cf5abbd1e7792068a5c4ae8c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/49bfcbfd989a8f1f23e705759a6bb099de2cff9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5946fbf48355f5a8caeff72580c7658da5966b86"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c3ec88b03e9e4ca117dcdc4204fd3edcd02084f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b25b60d076164edb3025e85aabd2cf50a5215b91"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net: rds: fix memory leak in rds_recvmsg", "id": "2282563", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282563"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L", "status": "draft"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: rds: fix memory leak in rds_recvmsg\nSyzbot reported memory leak in rds. The problem\nwas in unputted refcount in case of error.\nint rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,\nint msg_flags)\n{\n...\nif (!rds_next_incoming(rs, &inc)) {\n...\n}\nAfter this \"if\" inc refcount incremented and\nif (rds_cmsg_recv(inc, msg, rs)) {\nret = -EFAULT;\ngoto out;\n}\n...\nout:\nreturn ret;\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()\n1) | rds_recvmsg() {\n1) 3.721 us | rds_inc_addref();\n1) 3.853 us | rds_message_inc_copy_to_user();\n1) + 10.395 us | rds_cmsg_recv();\n1) + 34.260 us | }"], "name": "CVE-2021-47249", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47249\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47249\nhttps://lore.kernel.org/linux-cve-announce/2024052144-CVE-2021-47249-ed65@gregkh/T"], "threat_severity": "Low", "upstream_fix": "kernel 4.4.274, kernel 4.9.274, kernel 4.14.238, kernel 4.19.196, kernel 5.4.128, kernel 5.10.46, kernel 5.12.13, kernel 5.13"}