CVE-2022-50543

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both sides of the resulting double-free are under attacker control with no race.\nPR:L - Creating the SoftRoCE device requires CAP_NET_ADMIN, but once present /dev/infiniband/uverbs* is mode 0666 with no capability check on open or reg_mr, so any unprivileged local user can trigger the bug.\nUI:N - Exploitation requires only the attacker's own uverbs calls (open device, alloc PD, reg MR); no victim action is needed.\nS:U - The double-free corrupts kernel heap memory within the same host kernel authority; it does not cross a VM, IOMMU, or other security boundary.\nC:H - A kernel heap double-free enables use-after-free style heap spraying and reclaim of the freed objects, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same double-free/UAF primitive enables heap corruption sufficient for arbitrary kernel writes and control-flow hijacking / privilege escalation.\nA:H - The double-free immediately triggers KASAN reports, oopses, or panics (as shown in the fix commit call trace), so availability impact is total kernel crash."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/sw/rxe/rxe_mr.c"], "versions": [{"version": "1e75550648da1fa1cd1969e7597355de8fe8caf6", "lessThan": "6ce577f09013206e36e674cd27da3707b2278268", "status": "affected", "versionType": "git"}, {"version": "1e75550648da1fa1cd1969e7597355de8fe8caf6", "lessThan": "06f73568f553b5be6ba7f6fe274d333ea29fc46d", "status": "affected", "versionType": "git"}, {"version": "1e75550648da1fa1cd1969e7597355de8fe8caf6", "lessThan": "7d984dac8f6bf4ebd3398af82b357e1d181ecaac", "status": "affected", "versionType": "git"}, {"version": "e004a35e8148ad9fc438b0479884641acf382896", "status": "affected", "versionType": "git"}, {"version": "5.19.4", "lessThan": "5.20", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/sw/rxe/rxe_mr.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "6.0", "versionEndExcluding": "6.0.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6ce577f09013206e36e674cd27da3707b2278268"}, {"url": "https://git.kernel.org/stable/c/06f73568f553b5be6ba7f6fe274d333ea29fc46d"}, {"url": "https://git.kernel.org/stable/c/7d984dac8f6bf4ebd3398af82b357e1d181ecaac"}], "title": "RDMA/rxe: Fix mr->map double free", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-50543", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-06-10T20:40:50.837424Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T18:44:06.141Z"}}]}}

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ib_uverbs_cmd_verbs+0x1397/0x15a0 [ib_uverbs]\n\nThis issue was firstly exposed since commit b18c7da63fcb (\"RDMA/rxe: Fix\nmemory leak in error path code\") and then we fixed it in commit\n8ff5f5d9d8cf (\"RDMA/rxe: Prevent double freeing rxe_map_set()\") but this\nfix was reverted together at last by commit 1e75550648da (Revert\n\"RDMA/rxe: Create duplicate mapping tables for FMRs\")\n\nSimply let rxe_mr_cleanup() always handle freeing the mr->map once it is\nsuccessfully allocated."}], "id": "CVE-2022-50543", "lastModified": "2026-08-04T10:18:19.217", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, 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{"bugzilla": {"description": "kernel: RDMA/rxe: Fix mr->map double free", "id": "2402222", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402222"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50543", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50543\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50543\nhttps://lore.kernel.org/linux-cve-announce/2025100756-CVE-2022-50543-597d@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-08T13:36:40.672598+00:00", "updated": "2025-10-08T13:36:40.672623+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}