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CVE-2023-53525 (GCVE-0-2023-53525)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:46 – Updated: 2026-05-23 15:29
VLAI
Title
RDMA/cma: Allow UD qp_type to join multicast only
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Allow UD qp_type to join multicast only As for multicast: - The SIDR is the only mode that makes sense; - Besides PS_UDP, other port spaces like PS_IB is also allowed, as it is UD compatible. In this case qkey also needs to be set [1]. This patch allows only UD qp_type to join multicast, and set qkey to default if it's not set, to fix an uninit-value error: the ib->rec.qkey field is accessed without being initialized. ===================================================== BUG: KMSAN: uninit-value in cma_set_qkey drivers/infiniband/core/cma.c:510 [inline] BUG: KMSAN: uninit-value in cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570 cma_set_qkey drivers/infiniband/core/cma.c:510 [inline] cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570 cma_iboe_join_multicast drivers/infiniband/core/cma.c:4782 [inline] rdma_join_multicast+0x2b83/0x30a0 drivers/infiniband/core/cma.c:4814 ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479 ucma_join_multicast+0x1e3/0x250 drivers/infiniband/core/ucma.c:1546 ucma_write+0x639/0x6d0 drivers/infiniband/core/ucma.c:1732 vfs_write+0x8ce/0x2030 fs/read_write.c:588 ksys_write+0x28c/0x520 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __ia32_sys_write+0xdb/0x120 fs/read_write.c:652 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Local variable ib.i created at: cma_iboe_join_multicast drivers/infiniband/core/cma.c:4737 [inline] rdma_join_multicast+0x586/0x30a0 drivers/infiniband/core/cma.c:4814 ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479 CPU: 0 PID: 29874 Comm: syz-executor.3 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ===================================================== [1] https://lore.kernel.org/linux-rdma/20220117183832.GD84788@nvidia.com/
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b5de0c60cc30c2a3513c7188c73f3f29acc29234 , < ae11498851423d6de27aebfe12a5ee85060ab1d5 (git)
Affected: b5de0c60cc30c2a3513c7188c73f3f29acc29234 , < 48e8e7851dc0b1584d83817a78fc7108c8904b54 (git)
Affected: b5de0c60cc30c2a3513c7188c73f3f29acc29234 , < 02eabb635bc64bd1e3a7cf887d6d182bffb64b99 (git)
Affected: b5de0c60cc30c2a3513c7188c73f3f29acc29234 , < bb18b9dbac2bbdf7695e0bfaac4bf944ff7b207d (git)
Affected: b5de0c60cc30c2a3513c7188c73f3f29acc29234 , < 58e84f6b3e84e46524b7e5a916b53c1ad798bc8f (git)
Affected: b8d1adbff983be0b54f61c9a4169609d7fab0620 (git)
Affected: feed39c8d1282279fcb30612aa0e8d2635c11280 (git)
Affected: 5.8.17 , < 5.9 (semver)
Affected: 5.9.2 , < 5.10 (semver)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.178 , ≤ 5.10.* (semver)
Unaffected: 5.15.108 , ≤ 5.15.* (semver)
Unaffected: 6.1.25 , ≤ 6.1.* (semver)
Unaffected: 6.2.12 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Allow UD qp_type to join multicast only\n\nAs for multicast:\n- The SIDR is the only mode that makes sense;\n- Besides PS_UDP, other port spaces like PS_IB is also allowed, as it is\n  UD compatible. In this case qkey also needs to be set [1].\n\nThis patch allows only UD qp_type to join multicast, and set qkey to\ndefault if it\u0027s not set, to fix an uninit-value error: the ib-\u003erec.qkey\nfield is accessed without being initialized.\n\n=====================================================\nBUG: KMSAN: uninit-value in cma_set_qkey drivers/infiniband/core/cma.c:510 [inline]\nBUG: KMSAN: uninit-value in cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570\n cma_set_qkey drivers/infiniband/core/cma.c:510 [inline]\n cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570\n cma_iboe_join_multicast drivers/infiniband/core/cma.c:4782 [inline]\n rdma_join_multicast+0x2b83/0x30a0 drivers/infiniband/core/cma.c:4814\n ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479\n ucma_join_multicast+0x1e3/0x250 drivers/infiniband/core/ucma.c:1546\n ucma_write+0x639/0x6d0 drivers/infiniband/core/ucma.c:1732\n vfs_write+0x8ce/0x2030 fs/read_write.c:588\n ksys_write+0x28c/0x520 fs/read_write.c:643\n __do_sys_write fs/read_write.c:655 [inline]\n __se_sys_write fs/read_write.c:652 [inline]\n __ia32_sys_write+0xdb/0x120 fs/read_write.c:652\n do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]\n __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180\n do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205\n do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248\n entry_SYSENTER_compat_after_hwframe+0x4d/0x5c\n\nLocal variable ib.i created at:\ncma_iboe_join_multicast drivers/infiniband/core/cma.c:4737 [inline]\nrdma_join_multicast+0x586/0x30a0 drivers/infiniband/core/cma.c:4814\nucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479\n\nCPU: 0 PID: 29874 Comm: syz-executor.3 Not tainted 5.16.0-rc3-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\n=====================================================\n\n[1] https://lore.kernel.org/linux-rdma/20220117183832.GD84788@nvidia.com/"
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        "shortName": "Linux"
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    "datePublished": "2025-10-01T11:46:11.188Z",
    "dateReserved": "2025-10-01T11:39:39.407Z",
    "dateUpdated": "2026-05-23T15:29:20.818Z",
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  "vulnerability-lookup:meta": {
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      "percentile": "0.0409"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53525\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:57.037\",\"lastModified\":\"2026-06-17T06:45:31.933\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/cma: Allow UD qp_type to join multicast only\\n\\nAs for multicast:\\n- The SIDR is the only mode that makes sense;\\n- Besides PS_UDP, other port spaces like PS_IB is also allowed, as it is\\n  UD compatible. In this case qkey also needs to be set [1].\\n\\nThis patch allows only UD qp_type to join multicast, and set qkey to\\ndefault if it\u0027s not set, to fix an uninit-value error: the ib-\u003erec.qkey\\nfield is accessed without being initialized.\\n\\n=====================================================\\nBUG: KMSAN: uninit-value in cma_set_qkey drivers/infiniband/core/cma.c:510 [inline]\\nBUG: KMSAN: uninit-value in cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570\\n cma_set_qkey drivers/infiniband/core/cma.c:510 [inline]\\n cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570\\n cma_iboe_join_multicast drivers/infiniband/core/cma.c:4782 [inline]\\n rdma_join_multicast+0x2b83/0x30a0 drivers/infiniband/core/cma.c:4814\\n ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479\\n ucma_join_multicast+0x1e3/0x250 drivers/infiniband/core/ucma.c:1546\\n ucma_write+0x639/0x6d0 drivers/infiniband/core/ucma.c:1732\\n vfs_write+0x8ce/0x2030 fs/read_write.c:588\\n ksys_write+0x28c/0x520 fs/read_write.c:643\\n __do_sys_write fs/read_write.c:655 [inline]\\n __se_sys_write fs/read_write.c:652 [inline]\\n __ia32_sys_write+0xdb/0x120 fs/read_write.c:652\\n do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]\\n __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180\\n do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205\\n do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248\\n entry_SYSENTER_compat_after_hwframe+0x4d/0x5c\\n\\nLocal variable ib.i created at:\\ncma_iboe_join_multicast drivers/infiniband/core/cma.c:4737 [inline]\\nrdma_join_multicast+0x586/0x30a0 drivers/infiniband/core/cma.c:4814\\nucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479\\n\\nCPU: 0 PID: 29874 Comm: syz-executor.3 Not tainted 5.16.0-rc3-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\n=====================================================\\n\\n[1] https://lore.kernel.org/linux-rdma/20220117183832.GD84788@nvidia.com/\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/infiniband/core/cma.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"b5de0c60cc30c2a3513c7188c73f3f29acc29234\",\"lessThan\":\"ae11498851423d6de27aebfe12a5ee85060ab1d5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b5de0c60cc30c2a3513c7188c73f3f29acc29234\",\"lessThan\":\"48e8e7851dc0b1584d83817a78fc7108c8904b54\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b5de0c60cc30c2a3513c7188c73f3f29acc29234\",\"lessThan\":\"02eabb635bc64bd1e3a7cf887d6d182bffb64b99\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b5de0c60cc30c2a3513c7188c73f3f29acc29234\",\"lessThan\":\"bb18b9dbac2bbdf7695e0bfaac4bf944ff7b207d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b5de0c60cc30c2a3513c7188c73f3f29acc29234\",\"lessThan\":\"58e84f6b3e84e46524b7e5a916b53c1ad798bc8f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b8d1adbff983be0b54f61c9a4169609d7fab0620\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"feed39c8d1282279fcb30612aa0e8d2635c11280\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.8.17\",\"lessThan\":\"5.9\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.9.2\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/infiniband/core/cma.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.178\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.108\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.25\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2.12\",\"lessThanOrEqual\":\"6.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.8.17\",\"versionEndExcluding\":\"5.9\",\"matchCriteriaId\":\"BEFC3ACE-365D-48E7-9C0A-019C74CC0725\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.9.2\",\"versionEndExcluding\":\"5.10.178\",\"matchCriteriaId\":\"5FBFBAE2-EA3D-4686-ABC2-C23DC5C8E7DC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.108\",\"matchCriteriaId\":\"12E7A5F9-38FA-429F-A165-975A914E6666\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.25\",\"matchCriteriaId\":\"A6E5D96B-E06F-4EB1-B0AA-BB8F5E9187E0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.2.12\",\"matchCriteriaId\":\"4AA01E0B-227C-4686-AC91-BA30BCC48E6D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"A47F0FC3-CE52-4BA1-BA51-22F783938431\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3583026A-27EC-4A4C-850A-83F2AF970673\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"DC271202-7570-4505-89A4-D602D47BFD00\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"D413BB6D-4F74-4C7D-9163-47786619EF53\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"F4D613FB-9976-4989-8C4A-567773373CEA\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/02eabb635bc64bd1e3a7cf887d6d182bffb64b99\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/48e8e7851dc0b1584d83817a78fc7108c8904b54\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/58e84f6b3e84e46524b7e5a916b53c1ad798bc8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ae11498851423d6de27aebfe12a5ee85060ab1d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bb18b9dbac2bbdf7695e0bfaac4bf944ff7b207d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T22:27:32+00:00",
      "cve": "CVE-2023-53525",
      "id": "CVE-2023-53525",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "399",
      "product_status:known_affected": "38",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/cma: Allow UD qp_type to join multicast only",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53525.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:06:43Z",
      "cve": "CVE-2023-53525",
      "id": "CVE-2023-53525",
      "initial_release_date": "2025-10-01T23:29:34Z",
      "product_status:known_affected": "387",
      "product_status:known_not_affected": "352",
      "product_status:recommended": "255",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53525",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53525.json",
      "version": "22"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.