{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx5: Fix initializing CQ fragments buffer\n\nThe function init_cq_frag_buf() can be called to initialize the current CQ\nfragments buffer cq->buf, or the temporary cq->resize_buf that is filled\nduring CQ resize operation.\n\nHowever, the offending commit started to use function get_cqe() for\ngetting the CQEs, the issue with this change is that get_cqe() always\nreturns CQEs from cq->buf, which leads us to initialize the wrong buffer,\nand in case of enlarging the CQ we try to access elements beyond the size\nof the current cq->buf and eventually hit a kernel panic.\n\n [exception RIP: init_cq_frag_buf+103]\n [ffff9f799ddcbcd8] mlx5_ib_resize_cq at ffffffffc0835d60 [mlx5_ib]\n [ffff9f799ddcbdb0] ib_resize_cq at ffffffffc05270df [ib_core]\n [ffff9f799ddcbdc0] llt_rdma_setup_qp at ffffffffc0a6a712 [llt]\n [ffff9f799ddcbe10] llt_rdma_cc_event_action at ffffffffc0a6b411 [llt]\n [ffff9f799ddcbe98] llt_rdma_client_conn_thread at ffffffffc0a6bb75 [llt]\n [ffff9f799ddcbec8] kthread at ffffffffa66c5da1\n [ffff9f799ddcbf50] ret_from_fork_nospec_begin at ffffffffa6d95ddd\n\nFix it by getting the needed CQE by calling mlx5_frag_buf_get_wqe() that\ntakes the correct source buffer as a parameter.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2021-47261" }, { "summary":"CVE-2021-47261 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2021/csaf-openeuler-cve-2021-47261.json" }, { "summary":"openEuler-SA-2026-2673", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2673" }, { "summary":"CVE-2021-47261", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-47261&packageName=kernel" } ], "title":"openEuler cve CVE-2021-47261", "tracking":{ "initial_release_date":"2026-06-18T16:38:49+08:00", "revision_history":[ { "date":"2026-06-18T16:38:49+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-06-18T16:38:49+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-06-18T16:38:49+08:00", "id":"CVE-2021-47261", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:20.03-LTS-SP4" }, "product_id":"openEuler-20.03-LTS-SP4", "name":"openEuler-20.03-LTS-SP4" }, 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CQ\nfragments buffer cq->buf, or the temporary cq->resize_buf that is filled\nduring CQ resize operation.\n\nHowever, the offending commit started to use function get_cqe() for\ngetting the CQEs, the issue with this change is that get_cqe() always\nreturns CQEs from cq->buf, which leads us to initialize the wrong buffer,\nand in case of enlarging the CQ we try to access elements beyond the size\nof the current cq->buf and eventually hit a kernel panic.\n\n [exception RIP: init_cq_frag_buf+103]\n [ffff9f799ddcbcd8] mlx5_ib_resize_cq at ffffffffc0835d60 [mlx5_ib]\n [ffff9f799ddcbdb0] ib_resize_cq at ffffffffc05270df [ib_core]\n [ffff9f799ddcbdc0] llt_rdma_setup_qp at ffffffffc0a6a712 [llt]\n [ffff9f799ddcbe10] llt_rdma_cc_event_action at ffffffffc0a6b411 [llt]\n [ffff9f799ddcbe98] llt_rdma_client_conn_thread at ffffffffc0a6bb75 [llt]\n [ffff9f799ddcbec8] kthread at ffffffffa66c5da1\n [ffff9f799ddcbf50] ret_from_fork_nospec_begin at ffffffffa6d95ddd\n\nFix it by getting the needed CQE by calling mlx5_frag_buf_get_wqe() that\ntakes the correct source buffer as a parameter.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-20.03-LTS-SP4:bpftool-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:bpftool-debuginfo-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debuginfo-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debugsource-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-devel-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-source-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-debuginfo-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", 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"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":[ "openEuler-20.03-LTS-SP4:bpftool-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:bpftool-debuginfo-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debuginfo-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debugsource-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-devel-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-source-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-debuginfo-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-devel-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:perf-4.19.90-2606.3.0.0376.oe2003sp4.aarch64", 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