CVE-2026-72006

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72006", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.899Z", "datePublished": "2026-08-15T05:51:36.635Z", "dateUpdated": "2026-08-17T05:06:27.714Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:06:27.714Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: free mlx5_st_idx_data on final dealloc\n\nWorkloads that repeatedly allocate and release mkeys carrying TPH\nsteering-tag hints (e.g. churning RDMA MRs) leak one\nstruct mlx5_st_idx_data per cycle; kmemleak flags it as unreferenced\nand the kmalloc slab grows over time.\n\nWhen the last reference to an ST table entry is dropped,\nmlx5_st_dealloc_index() removed the entry from idx_xa but the backing\nmlx5_st_idx_data allocation was never freed.\n\nFree idx_data after the xa_erase() so the lifetime of the bookkeeping\nstruct matches the lifetime of the ST entry it tracks."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/lib/st.c"], "versions": [{"version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e", "lessThan": "262da8b6ea03d01ee7ed01ad309e4c89941f6b14", "status": "affected", "versionType": "git"}, {"version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e", "lessThan": "6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75", "status": "affected", "versionType": "git"}, {"version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e", "lessThan": "df6134b527a88b3e65ba6ae5073664af091d5fd2", "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/net/ethernet/mellanox/mlx5/core/lib/st.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.17", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/262da8b6ea03d01ee7ed01ad309e4c89941f6b14"}, {"url": "https://git.kernel.org/stable/c/6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75"}, {"url": "https://git.kernel.org/stable/c/df6134b527a88b3e65ba6ae5073664af091d5fd2"}], "title": "net/mlx5: free mlx5_st_idx_data on final dealloc", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/lib/st.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "262da8b6ea03d01ee7ed01ad309e4c89941f6b14", "status": "affected", "version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e", "versionType": "git"}, {"lessThan": "6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75", "status": "affected", "version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e", "versionType": "git"}, {"lessThan": "df6134b527a88b3e65ba6ae5073664af091d5fd2", "status": "affected", "version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/lib/st.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.17"}, {"lessThan": "6.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: free mlx5_st_idx_data on final dealloc\n\nWorkloads that repeatedly allocate and release mkeys carrying TPH\nsteering-tag hints (e.g. churning RDMA MRs) leak one\nstruct mlx5_st_idx_data per cycle; kmemleak flags it as unreferenced\nand the kmalloc slab grows over time.\n\nWhen the last reference to an ST table entry is dropped,\nmlx5_st_dealloc_index() removed the entry from idx_xa but the backing\nmlx5_st_idx_data allocation was never freed.\n\nFree idx_data after the xa_erase() so the lifetime of the bookkeeping\nstruct matches the lifetime of the ST entry it tracks."}], "id": "CVE-2026-72006", "lastModified": "2026-08-17T06:17:58.083", "metrics": {}, "published": "2026-08-15T06:20:59.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/262da8b6ea03d01ee7ed01ad309e4c89941f6b14"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df6134b527a88b3e65ba6ae5073664af091d5fd2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net/mlx5: free mlx5_st_idx_data on final dealloc", "id": "2516336", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516336"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's mlx5 driver. Repeated allocation and release of mkeys with TPH steering-tag hints can cause a memory leak of `struct mlx5_st_idx_data`. This unreferenced memory accumulates over time, potentially leading to resource exhaustion and a Denial of Service (DoS) for affected systems."], "name": "CVE-2026-72006", "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": "Out of support scope", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72006\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72006\nhttps://lore.kernel.org/linux-cve-announce/2026081507-CVE-2026-72006-c8b1@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[888a7776f4fb04c19bec70c737c61c2f383c6b1e,262da8b6ea03d01ee7ed01ad309e4c89941f6b14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[888a7776f4fb04c19bec70c737c61c2f383c6b1e,6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[888a7776f4fb04c19bec70c737c61c2f383c6b1e,df6134b527a88b3e65ba6ae5073664af091d5fd2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T07:45:04.795228+00:00", "updated": "2026-08-18T01:45:05.065668+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}