CVE-2022-50822

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both sides of the race are attacker-controlled, so no external conditions are required.\nPR:L - uverbs device nodes are created mode 0666 with no capability check in ib_uverbs_open, and RDMA_NLDEV_CMD_RES_MR_GET does not require RDMA_NL_ADMIN_PERM, so an unprivileged local user on a system with an RDMA device (hardware or SoftRoCE) can trigger the bug.\nUI:N - Exploitation requires only the attacker's own uverbs and netlink operations; no action by another user is needed.\nS:U - Impact remains within the local kernel's authority (resource tracking / MR object lifetime); this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - Skipping wait_for_completion lets ib_dereg_mr_user free the MR while nldev still holds a restrack kref and fill_res_mr_entry reads MR fields, yielding a use-after-free that can be leveraged for arbitrary disclosure.\nI:H - The same use-after-free of the MR/restrack object enables heap reuse and corruption primitives sufficient for integrity compromise or control-flow hijacking under the highest-severity interpretation.\nA:H - The UAF can cause kernel oops/crash, and even without winning the race every MR delete leaks a task_struct reference via the skipped rdma_restrack_put, which can exhaust kernel memory through repeated create/destroy."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/core/restrack.c"], "versions": [{"version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "13586753ae55146269a6dc8b216f17d86b81560c", "status": "affected", "versionType": "git"}, {"version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "37c90753079fc95d93cc31b79796dd2ae57ad018", "status": "affected", "versionType": "git"}, {"version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "8731cb5c7820bef577bab4ff17691fbf61c671cb", "status": "affected", "versionType": "git"}, {"version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "dac153f2802db1ad46207283cb9b2aae3d707a45", "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/core/restrack.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.86", "lessThanOrEqual": "5.15.*", "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": "5.10", "versionEndExcluding": "5.15.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.0.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/13586753ae55146269a6dc8b216f17d86b81560c"}, {"url": "https://git.kernel.org/stable/c/37c90753079fc95d93cc31b79796dd2ae57ad018"}, {"url": "https://git.kernel.org/stable/c/8731cb5c7820bef577bab4ff17691fbf61c671cb"}, {"url": "https://git.kernel.org/stable/c/dac153f2802db1ad46207283cb9b2aae3d707a45"}], "title": "RDMA/restrack: Release MR restrack when delete", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-50822", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:32:37.622581Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:41:24.165Z"}}]}}

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both sides of the race are attacker-controlled, so no external conditions are required.\nPR:L - uverbs device nodes are created mode 0666 with no capability check in ib_uverbs_open, and RDMA_NLDEV_CMD_RES_MR_GET does not require RDMA_NL_ADMIN_PERM, so an unprivileged local user on a system with an RDMA device (hardware or SoftRoCE) can trigger the bug.\nUI:N - Exploitation requires only the attacker's own uverbs and netlink operations; no action by another user is needed.\nS:U - Impact remains within the local kernel's authority (resource tracking / MR object lifetime); this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - Skipping wait_for_completion lets ib_dereg_mr_user free the MR while nldev still holds a restrack kref and fill_res_mr_entry reads MR fields, yielding a use-after-free that can be leveraged for arbitrary disclosure.\nI:H - The same use-after-free of the MR/restrack object enables heap reuse and corruption primitives sufficient for integrity compromise or control-flow hijacking under the highest-severity interpretation.\nA:H - The UAF can cause kernel oops/crash, and even without winning the race every MR delete leaks a task_struct reference via the skipped rdma_restrack_put, which can exhaust kernel memory through repeated create/destroy."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "13586753ae55146269a6dc8b216f17d86b81560c", "versionType": "git"}, {"status": "affected", "version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "37c90753079fc95d93cc31b79796dd2ae57ad018", "versionType": "git"}, {"status": "affected", "version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "8731cb5c7820bef577bab4ff17691fbf61c671cb", "versionType": "git"}, {"status": "affected", "version": "13ef5539def732dc7b9c58c320d97a0a95b52634", "lessThan": "dac153f2802db1ad46207283cb9b2aae3d707a45", "versionType": "git"}], "programFiles": ["drivers/infiniband/core/restrack.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"status": "unaffected", "version": "0", "lessThan": "5.10", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.86", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.0.16", "versionType": "semver", "lessThanOrEqual": "6.0.*"}, {"status": "unaffected", "version": "6.1.2", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/infiniband/core/restrack.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/13586753ae55146269a6dc8b216f17d86b81560c"}, {"url": "https://git.kernel.org/stable/c/37c90753079fc95d93cc31b79796dd2ae57ad018"}, {"url": "https://git.kernel.org/stable/c/8731cb5c7820bef577bab4ff17691fbf61c671cb"}, {"url": "https://git.kernel.org/stable/c/dac153f2802db1ad46207283cb9b2aae3d707a45"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/restrack: Release MR restrack when delete\n\nThe MR restrack also needs to be released when delete it, otherwise it\ncause memory leak as the task struct won't be released."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.86", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.16", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.2", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2", "versionStartIncluding": "5.10"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:47.720Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50822", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:41:24.165Z", "dateReserved": "2025-12-30T12:06:07.131Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-12-30T12:08:36.228Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "kernel: RDMA/restrack: Release MR restrack when delete", "id": "2426224", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2426224"}, "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-2022-50822", "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"}], "public_date": "2025-12-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50822\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50822\nhttps://lore.kernel.org/linux-cve-announce/2025123016-CVE-2022-50822-2187@gregkh/T"], "threat_severity": "Important"}

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