CVE-2021-47614

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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"}}]}}

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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": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "e8c4dbc2fcacf5a7468d312168bb120c27c38b32", "lessThan": "11eebcf63e98fcf047a876a51d76afdabc3b8b9b", "versionType": "git"}, {"status": "affected", "version": "e8c4dbc2fcacf5a7468d312168bb120c27c38b32", "lessThan": "1e11a39a82e95ce86f849f40dda0d9c0498cebd9", "versionType": "git"}], "programFiles": ["drivers/infiniband/hw/irdma/pble.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.14"}, {"status": "unaffected", "version": "0", "lessThan": "5.14", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.10", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/infiniband/hw/irdma/pble.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/11eebcf63e98fcf047a876a51d76afdabc3b8b9b"}, {"url": "https://git.kernel.org/stable/c/1e11a39a82e95ce86f849f40dda0d9c0498cebd9"}], "x_generator": {"engine": "bippy-1.2.0"}, "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.10", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.16", "versionStartIncluding": "5.14"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:48:38.472Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47614", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:48:38.472Z", "dateReserved": "2024-06-19T14:55:32.795Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-06-19T14:58:02.467Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"affected_release": [{"advisory": "RHSA-2022:1975", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-372.9.1.rt7.166.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-05-10T00:00:00Z"}, {"advisory": "RHSA-2022:1988", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-372.9.1.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-05-10T00:00:00Z"}], "bugzilla": {"description": "kernel: RDMA/irdma: Fix a user-after-free in add_pble_prm", "id": "2293265", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293265"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/irdma: Fix a user-after-free in add_pble_prm\nWhen irdma_hmc_sd_one fails, 'chunk' is freed while its still on the PBLE\ninfo list.\nAdd the chunk entry to the PBLE info list only after successful setting of\nthe SD in irdma_hmc_sd_one.", "A vulnerability was found in the Linux kernel's RDMA/irdma driver. Improper memory management in the add_pble_prm function fails to manage memory correctly, resulting in a user-after-free condition that can lead to exploitation. This flaw allows an attacker to manipulate memory access potentially, resulting in data corruption or system crashes."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2021-47614", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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: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": "2024-06-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47614\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47614\nhttps://lore.kernel.org/linux-cve-announce/2024061908-CVE-2021-47614-6dd2@gregkh/T"], "threat_severity": "Moderate"}

{}