CVE-2026-46176 (GCVE-0-2026-46176)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-08-05 12:30
VLAI
Title
RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init() mlx5_ib_dev_res_srq_init() allocates two SRQs, s0 and s1. When ib_create_srq() fails for s1, the error branch destroys s0 but falls through and unconditionally assigns the freed s0 and the ERR_PTR s1 to devr->s0 and devr->s1. This leads to several problems: the lock-free fast path checks "if (devr->s1) return 0;" and treats the ERR_PTR as already initialised; users in mlx5_ib_create_qp() dereference the freed SRQ or ERR_PTR via to_msrq(devr->s0)->msrq.srqn; and mlx5_ib_dev_res_cleanup() dereferences the ERR_PTR and double-frees s0 on teardown. Fix by adding the same `goto unlock` in the s1 failure path.
CWE
  • CWE-825 - Expired Pointer Dereference
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: b6334d2356fc0922ed01457960f74923058a353a , < a13c2ac4d480b734342c6fbf8249fc48afd675f3 (git)
Affected: 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 , < bc2cf5935b4665172235341163315905197ae91d (git)
Affected: 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 , < b087913ae88256df66620f7ba0a9776716aeef7e (git)
Affected: 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 , < 6fd93142dd1d09000c3750af08270f5792523fe9 (git)
Affected: 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 , < c488df06bd552bb8b6e14fa0cfd5ad986c6e9525 (git)
Affected: 6.6.64 , < 6.6.140 (semver)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:6.12.0-211.29.1.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:6.12.0-55.84.1.el10_0 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:5.14.0-687.19.1.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
    cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:5.14.0-570.125.1.el9_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Show details on NVD website

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When\\nib_create_srq() fails for s1, the error branch destroys s0 but falls\\nthrough and unconditionally assigns the freed s0 and the ERR_PTR s1 to\\ndevr-\u003es0 and devr-\u003es1.\\n\\nThis leads to several problems: the lock-free fast path checks\\n\\\"if (devr-\u003es1) return 0;\\\" and treats the ERR_PTR as already initialised;\\nusers in mlx5_ib_create_qp() dereference the freed SRQ or ERR_PTR via\\nto_msrq(devr-\u003es0)-\u003emsrq.srqn; and mlx5_ib_dev_res_cleanup() dereferences\\nthe ERR_PTR and double-frees s0 on teardown.\\n\\nFix by adding the same `goto unlock` in the s1 failure path.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/infiniband/hw/mlx5/main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"b6334d2356fc0922ed01457960f74923058a353a\",\"lessThan\":\"a13c2ac4d480b734342c6fbf8249fc48afd675f3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5895e70f2e6e8dc67b551ca554d6fcde0a7f0467\",\"lessThan\":\"bc2cf5935b4665172235341163315905197ae91d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5895e70f2e6e8dc67b551ca554d6fcde0a7f0467\",\"lessThan\":\"b087913ae88256df66620f7ba0a9776716aeef7e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5895e70f2e6e8dc67b551ca554d6fcde0a7f0467\",\"lessThan\":\"6fd93142dd1d09000c3750af08270f5792523fe9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5895e70f2e6e8dc67b551ca554d6fcde0a7f0467\",\"lessThan\":\"c488df06bd552bb8b6e14fa0cfd5ad986c6e9525\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.6.64\",\"lessThan\":\"6.6.140\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/infiniband/hw/mlx5/main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.11\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.11\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.140\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.88\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.30\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.7\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10.2\"],\"versions\":[{\"version\":\"0:6.12.0-211.29.1.el10_2\",\"lessThan\":\"*\",\"versionType\":\"rpm\",\"status\":\"unaffected\"}]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10.0 Extended Update Support\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux_eus:10.0\"],\"versions\":[{\"version\":\"0:6.12.0-55.84.1.el10_0\",\"lessThan\":\"*\",\"versionType\":\"rpm\",\"status\":\"unaffected\"}]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/a:redhat:enterprise_linux:9\",\"cpe:/o:redhat:enterprise_linux:9\"],\"versions\":[{\"version\":\"0:5.14.0-687.19.1.el9_8\",\"lessThan\":\"*\",\"versionType\":\"rpm\",\"status\":\"unaffected\"}]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9.6 Extended Update Support\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/a:redhat:rhel_eus:9.6\"],\"versions\":[{\"version\":\"0:5.14.0-570.125.1.el9_6\",\"lessThan\":\"*\",\"versionType\":\"rpm\",\"status\":\"unaffected\"}]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 6\",\"defaultStatus\":\"unknown\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:6\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 7\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 7\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel-rt\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel-rt\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"kernel-rt\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-825\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6.64\",\"versionEndExcluding\":\"6.6.140\",\"matchCriteriaId\":\"18212E34-C124-4A56-8B46-DF417D5D4C10\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.11\",\"versionEndExcluding\":\"6.12.88\",\"matchCriteriaId\":\"B6C7F34D-687C-4176-A951-1AD364601D9A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.30\",\"matchCriteriaId\":\"BF39AE08-AE6D-4410-8FBE-76F6BF5BF55B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.7\",\"matchCriteriaId\":\"D0893CA7-9AE6-4DFE-AC75-48967D73AD8E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1EF7059-E670-45F4-B422-54C40FA86390\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D38F0BF-A728-4133-A358-D44A2F7EE6D6\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6fd93142dd1d09000c3750af08270f5792523fe9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a13c2ac4d480b734342c6fbf8249fc48afd675f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b087913ae88256df66620f7ba0a9776716aeef7e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bc2cf5935b4665172235341163315905197ae91d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c488df06bd552bb8b6e14fa0cfd5ad986c6e9525\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:30848\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:33215\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:33685\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:34094\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-46176\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2482594\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46176.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-01T13:23:06+00:00",
      "cve": "CVE-2026-46176",
      "id": "CVE-2026-46176",
      "initial_release_date": "2026-05-28T00:00:00+00:00",
      "product_status:fixed": "1224",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "76",
      "product_status:under_investigation": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46176.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-22T16:27:52Z",
      "cve": "CVE-2026-46176",
      "id": "CVE-2026-46176",
      "initial_release_date": "2026-05-29T01:15:44Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "441",
      "product_status:known_not_affected": "181",
      "product_status:recommended": "340",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46176",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46176.json",
      "version": "19"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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