cve-2021-47012
Vulnerability from cvelistv5
Published
2024-02-28 08:13
Modified
2024-11-04 11:57
Severity ?
EPSS score ?
Summary
RDMA/siw: Fix a use after free in siw_alloc_mr
References
{ "containers": { "adp": [ { "metrics": [ { "other": { "content": { "id": "CVE-2021-47012", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2024-02-28T20:34:17.324799Z", "version": "2.0.3" }, "type": "ssvc" } } ], "providerMetadata": { "dateUpdated": "2024-06-04T17:13:27.028Z", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP" }, "title": "CISA ADP Vulnrichment" }, { "providerMetadata": { "dateUpdated": "2024-08-04T05:24:39.841Z", "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE" }, "references": [ { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63" } ], "title": "CVE Program Container" } ], "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Linux", "programFiles": [ "drivers/infiniband/sw/siw/siw_mem.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "lessThan": "30b9e92d0b5e", "status": "affected", "version": "2251334dcac9", "versionType": "git" }, { "lessThan": "608a4b90ece0", "status": "affected", "version": "2251334dcac9", "versionType": "git" }, { "lessThan": "3e22b88e02c1", "status": "affected", "version": "2251334dcac9", "versionType": "git" }, { "lessThan": "ad9ce7188432", "status": "affected", "version": "2251334dcac9", "versionType": "git" }, { "lessThan": "3093ee182f01", "status": "affected", "version": "2251334dcac9", "versionType": "git" } ] }, { "defaultStatus": "affected", "product": "Linux", "programFiles": [ "drivers/infiniband/sw/siw/siw_mem.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "status": "affected", "version": "5.3" }, { "lessThan": "5.3", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.119", "versionType": "semver" }, { "lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.37", "versionType": "semver" }, { "lessThanOrEqual": "5.11.*", "status": "unaffected", "version": "5.11.21", "versionType": "semver" }, { "lessThanOrEqual": "5.12.*", "status": "unaffected", "version": "5.12.4", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix" } ] } ], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix a use after free in siw_alloc_mr\n\nOur code analyzer reported a UAF.\n\nIn siw_alloc_mr(), it calls siw_mr_add_mem(mr,..). In the implementation of\nsiw_mr_add_mem(), mem is assigned to mr-\u003emem and then mem is freed via\nkfree(mem) if xa_alloc_cyclic() failed. Here, mr-\u003emem still point to a\nfreed object. After, the execution continue up to the err_out branch of\nsiw_alloc_mr, and the freed mr-\u003emem is used in siw_mr_drop_mem(mr).\n\nMy patch moves \"mr-\u003emem = mem\" behind the if (xa_alloc_cyclic(..)\u003c0) {}\nsection, to avoid the uaf." } ], "providerMetadata": { "dateUpdated": "2024-11-04T11:57:42.023Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4" }, { "url": "https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c" }, { "url": "https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4" }, { "url": "https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155" }, { "url": "https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63" } ], "title": "RDMA/siw: Fix a use after free in siw_alloc_mr", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-47012", "datePublished": "2024-02-28T08:13:30.284Z", "dateReserved": "2024-02-27T18:42:55.953Z", "dateUpdated": "2024-11-04T11:57:42.023Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-47012\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-28T09:15:38.753\",\"lastModified\":\"2024-02-28T14:06:45.783\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/siw: Fix a use after free in siw_alloc_mr\\n\\nOur code analyzer reported a UAF.\\n\\nIn siw_alloc_mr(), it calls siw_mr_add_mem(mr,..). In the implementation of\\nsiw_mr_add_mem(), mem is assigned to mr-\u003emem and then mem is freed via\\nkfree(mem) if xa_alloc_cyclic() failed. Here, mr-\u003emem still point to a\\nfreed object. After, the execution continue up to the err_out branch of\\nsiw_alloc_mr, and the freed mr-\u003emem is used in siw_mr_drop_mem(mr).\\n\\nMy patch moves \\\"mr-\u003emem = mem\\\" behind the if (xa_alloc_cyclic(..)\u003c0) {}\\nsection, to avoid the uaf.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: RDMA/siw: Corrige un use after free en siw_alloc_mr Nuestro analizador de c\u00f3digo inform\u00f3 un UAF. En siw_alloc_mr(), llama a siw_mr_add_mem(mr,..). En la implementaci\u00f3n de siw_mr_add_mem(), mem se asigna a mr-\u0026gt;mem y luego mem se libera mediante kfree(mem) si xa_alloc_ciclic() falla. Aqu\u00ed, mr-\u0026gt;mem todav\u00eda apunta a un objeto liberado. Despu\u00e9s, la ejecuci\u00f3n contin\u00faa hasta la rama err_out de siw_alloc_mr, y el mr-\u0026gt;mem liberado se usa en siw_mr_drop_mem(mr). Mi parche mueve \\\"mr-\u0026gt;mem = mem\\\" detr\u00e1s de la secci\u00f3n if (xa_alloc_ciclic(..)\u0026lt;0) {}, para evitar el uaf.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}" } }
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.