{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47261","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-21T13:27:52.126Z","datePublished":"2024-05-21T14:19:54.025Z","dateUpdated":"2025-05-04T07:07:26.307Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:07:26.307Z"},"descriptions":[{"lang":"en","value":"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/mlx5/cq.c"],"versions":[{"version":"388ca8be00370db132464e27f745b8a0add19fcb","lessThan":"1ec2dcd680c71d0d36fa25638b327a468babd5c9","status":"affected","versionType":"git"},{"version":"388ca8be00370db132464e27f745b8a0add19fcb","lessThan":"e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26","status":"affected","versionType":"git"},{"version":"388ca8be00370db132464e27f745b8a0add19fcb","lessThan":"91f7fdc4cc10542ca1045c06aad23365f0d067e0","status":"affected","versionType":"git"},{"version":"388ca8be00370db132464e27f745b8a0add19fcb","lessThan":"3e670c54eda238cb8a1ea93538a79ae89285c1c4","status":"affected","versionType":"git"},{"version":"388ca8be00370db132464e27f745b8a0add19fcb","lessThan":"2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/mlx5/cq.c"],"versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"4.19.195","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.126","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.44","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.12.11","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":"4.17","versionEndExcluding":"4.19.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.4.126"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.10.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.12.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9"},{"url":"https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26"},{"url":"https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0"},{"url":"https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4"},{"url":"https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a"}],"title":"IB/mlx5: Fix initializing CQ fragments buffer","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47261","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-21T18:50:22.252363Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:14:42.110Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:32:07.928Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a","tags":["x_transferred"]}]}]}}