{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47614","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-06-19T14:55:32.795Z","datePublished":"2024-06-19T14:58:02.467Z","dateUpdated":"2026-08-05T08:48:38.472Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:48:38.472Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Fix a user-after-free in add_pble_prm\n\nWhen irdma_hmc_sd_one fails, 'chunk' is freed while its still on the PBLE\ninfo list.\n\nAdd the chunk entry to the PBLE info list only after successful setting of\nthe SD in irdma_hmc_sd_one."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached through local RDMA verbs (reg_user_mr/alloc_mr → irdma_get_pble → add_pble_prm) via /dev/infiniband/uverbs*, not by parsing remote RDMA/iWARP packets.\nAC:L - An attacker can exhaust the PBLE pool with large MR registrations to force add_pble_prm, then induce irdma_hmc_sd_one failure via CQP request GFP_ATOMIC exhaustion or concurrent CQP load; once planted, subsequent get_pbles walks the freed chunk deterministically.\nPR:L - uverbs nodes default to mode 0666 and REG_MR/alloc_mr require no capability; InfiniBand verbs are intentionally usable by unprivileged processes once an irdma device is present.\nUI:N - The attacker opens uverbs and issues memory-registration verbs themselves; no separate victim action is required.\nS:U - Impact is host-kernel heap corruption / privilege escalation within the same OS security authority, with no VM escape, IOMMU bypass, or other cross-boundary effect.\nC:H - The freed irdma_chunk remains on pinfo.clist and is later used by irdma_prm_get_pbles (bitmapbuf/vaddr), yielding a classic slab UAF that enables arbitrary kernel memory disclosure.\nI:H - The same reclaimable chunk UAF (and destroy-path double-free) enables heap spraying and arbitrary write/control-flow hijack primitives consistent with UAF scoring guidance.\nA:H - Walking or freeing the dangling chunk list entry causes kernel oops/panic even without a full exploit, so availability impact is High."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/hw/irdma/pble.c"],"versions":[{"version":"e8c4dbc2fcacf5a7468d312168bb120c27c38b32","lessThan":"11eebcf63e98fcf047a876a51d76afdabc3b8b9b","status":"affected","versionType":"git"},{"version":"e8c4dbc2fcacf5a7468d312168bb120c27c38b32","lessThan":"1e11a39a82e95ce86f849f40dda0d9c0498cebd9","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/irdma/pble.c"],"versions":[{"version":"5.14","status":"affected"},{"version":"0","lessThan":"5.14","status":"unaffected","versionType":"semver"},{"version":"5.15.10","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16","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":"5.14","versionEndExcluding":"5.15.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"5.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/11eebcf63e98fcf047a876a51d76afdabc3b8b9b"},{"url":"https://git.kernel.org/stable/c/1e11a39a82e95ce86f849f40dda0d9c0498cebd9"}],"title":"RDMA/irdma: Fix a user-after-free in add_pble_prm","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:47:40.790Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/11eebcf63e98fcf047a876a51d76afdabc3b8b9b","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/1e11a39a82e95ce86f849f40dda0d9c0498cebd9","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47614","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T17:11:52.033975Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:34:50.870Z"}}]}}