Vulnerability-Lookup

FKIE_CVE-2023-53484

Vulnerability from fkie_nvd - Published: 2025-10-01 12:15 - Updated: 2026-08-04 10:19

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: lib: cpu_rmap: Avoid use after free on rmap->obj array entries When calling irq_set_affinity_notifier() with NULL at the notify argument, it will cause freeing of the glue pointer in the corresponding array entry but will leave the pointer in the array. A subsequent call to free_irq_cpu_rmap() will try to free this entry again leading to possible use after free. Fix that by setting NULL to the array entry and checking that we have non-zero at the array entry when iterating over the array in free_irq_cpu_rmap(). The current code does not suffer from this since there are no cases where irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the notify arg) is called, followed by a call to free_irq_cpu_rmap() so we don't hit and issue. Subsequent patches in this series excersize this flow, hence the required fix.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4e0473f1060aa49621d40a113afde24818101d37	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67bca5f1d644f4e79b694abd8052a177de81c37f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/981f339d2905b6a92ef59358158b326493aecac5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c6ed54dd90698dc0744d669524cc1c122ded8a16	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d1308bd0b24cb1d78fa2747d5fa3e055cc628a48	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f748e15253833b771acbede14ea98f50831ac289	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	3.8
linux	linux_kernel	3.8
linux	linux_kernel	3.8
linux	linux_kernel	3.8
linux	linux_kernel	3.8

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "lib/cpu_rmap.c"
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          "versions": [
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              "version": "3.8"
            },
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              "version": "0",
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            },
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            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.284",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.244",
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            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.181",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.113",
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
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              "version": "6.3.4",
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            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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              "matchCriteriaId": "B7A02E65-365A-4781-BA03-7D649C1BCED3",
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            },
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              "vulnerable": true
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              "vulnerable": true
            }
          ],
          "negate": false,
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        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib: cpu_rmap: Avoid use after free on rmap-\u003eobj array entries\n\nWhen calling irq_set_affinity_notifier() with NULL at the notify\nargument, it will cause freeing of the glue pointer in the\ncorresponding array entry but will leave the pointer in the array. A\nsubsequent call to free_irq_cpu_rmap() will try to free this entry again\nleading to possible use after free.\n\nFix that by setting NULL to the array entry and checking that we have\nnon-zero at the array entry when iterating over the array in\nfree_irq_cpu_rmap().\n\nThe current code does not suffer from this since there are no cases\nwhere irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the\nnotify arg) is called, followed by a call to free_irq_cpu_rmap() so we\ndon\u0027t hit and issue. Subsequent patches in this series excersize this\nflow, hence the required fix."
    }
  ],
  "id": "CVE-2023-53484",
  "lastModified": "2026-08-04T10:19:08.263",
  "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,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "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,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-10-01T12:15:51.180",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/4e0473f1060aa49621d40a113afde24818101d37"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/67bca5f1d644f4e79b694abd8052a177de81c37f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/981f339d2905b6a92ef59358158b326493aecac5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c6ed54dd90698dc0744d669524cc1c122ded8a16"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d1308bd0b24cb1d78fa2747d5fa3e055cc628a48"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/f748e15253833b771acbede14ea98f50831ac289"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2023-53484 (GCVE-0-2023-53484)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2026-08-05 09:14

Title

lib: cpu_rmap: Avoid use after free on rmap->obj array entries

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/981f339d2905b6a92…
https://git.kernel.org/stable/c/d1308bd0b24cb1d78…
https://git.kernel.org/stable/c/cc2d2b3dbfb0ba57b…
https://git.kernel.org/stable/c/f748e15253833b771…
https://git.kernel.org/stable/c/c6ed54dd90698dc07…
https://git.kernel.org/stable/c/c9115f49cf260d24d…
https://git.kernel.org/stable/c/67bca5f1d644f4e79…
https://git.kernel.org/stable/c/4e0473f1060aa4962…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < 981f339d2905b6a92ef59358158b326493aecac5 (git) Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < d1308bd0b24cb1d78fa2747d5fa3e055cc628a48 (git) Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000 (git) Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < f748e15253833b771acbede14ea98f50831ac289 (git) Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < c6ed54dd90698dc0744d669524cc1c122ded8a16 (git) Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4 (git) Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < 67bca5f1d644f4e79b694abd8052a177de81c37f (git) Affected: 896f97ea95c1d29c0520ee0766b66b7f64cb967c , < 4e0473f1060aa49621d40a113afde24818101d37 (git)
Linux	Linux	Affected: 3.8 Unaffected: 0 , < 3.8 (semver) Unaffected: 4.14.316 , ≤ 4.14.* (semver) Unaffected: 4.19.284 , ≤ 4.19.* (semver) Unaffected: 5.4.244 , ≤ 5.4.* (semver) Unaffected: 5.10.181 , ≤ 5.10.* (semver) Unaffected: 5.15.113 , ≤ 5.15.* (semver) Unaffected: 6.1.30 , ≤ 6.1.* (semver) Unaffected: 6.3.4 , ≤ 6.3.* (semver) Unaffected: 6.4 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "lib/cpu_rmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "896f97ea95c1d29c0520ee0766b66b7f64cb967c",
              "versionType": "git"
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            },
            {
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              "versionType": "git"
            },
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
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            },
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          "versions": [
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              "version": "3.8"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "4.14.316",
              "versionType": "semver"
            },
            {
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              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.181",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.316",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.284",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.244",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.181",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.113",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.30",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3.4",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib: cpu_rmap: Avoid use after free on rmap-\u003eobj array entries\n\nWhen calling irq_set_affinity_notifier() with NULL at the notify\nargument, it will cause freeing of the glue pointer in the\ncorresponding array entry but will leave the pointer in the array. A\nsubsequent call to free_irq_cpu_rmap() will try to free this entry again\nleading to possible use after free.\n\nFix that by setting NULL to the array entry and checking that we have\nnon-zero at the array entry when iterating over the array in\nfree_irq_cpu_rmap().\n\nThe current code does not suffer from this since there are no cases\nwhere irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the\nnotify arg) is called, followed by a call to free_irq_cpu_rmap() so we\ndon\u0027t hit and issue. Subsequent patches in this series excersize this\nflow, hence the required fix."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached only through local device-configuration and teardown paths (`ethtool -L`/set-channels, interface down, devlink SF/VF teardown, driver unbind) that drive `irq_cpu_rmap_remove()` and `free_irq_cpu_rmap()`. No remote packet or protocol data reaches `lib/cpu_rmap.c`; the RFS receive path only reads `rmap-\u003enear[]`, not the freed glue objects.\nAC:L - The use-after-free is deterministic and requires no race \u2014 releasing an IRQ vector leaves a stale `rmap-\u003eobj[]` entry that the subsequent `free_irq_cpu_rmap()` walk unconditionally dereferences, and the attacker fully controls the ordering and timing of both steps. `CONFIG_RFS_ACCEL` is `default y` (depends on `RPS`), so the required configuration is the norm on distro kernels, and the unbounded window between free and walk lets the attacker reliably groom the `kmalloc-64` slab.\nPR:L - Triggering requires CAP_NET_ADMIN over the affected netdev (ethtool set-channels, link down, devlink SF removal), which per kernel-CNA guidance scores as Low rather than High. In common SR-IOV/container deployments an mlx5 VF netdev is delegated into a network namespace owned by a user namespace, giving an otherwise unprivileged container-local user exactly this capability over the device.\nUI:N - No victim action is needed; the attacker performs both the IRQ-vector release and the subsequent rmap teardown entirely on their own via device reconfiguration.\nS:U - The freed object, the corrupted state, and the resulting impact are all within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free on a `kmalloc-64` GFP_KERNEL object with an attacker-paced reclaim window, so the freed `struct irq_glue` can be reoccupied with sprayed data; the attacker-controlled `notify.irq` then selects an arbitrary `irq_desc`, and the resulting refcount underflow and indirect `-\u003erelease` call chain can be leveraged into arbitrary kernel memory disclosure.\nI:H - After reclaiming the freed glue, `irq_set_affinity_notifier(glue-\u003enotify.irq, NULL)` performs an arbitrary IRQ-descriptor lookup and issues spurious `kref_put(\u0026old_notify-\u003ekref, old_notify-\u003erelease)` calls on a live notifier, producing refcount underflow, premature free, and an indirect call through a function pointer \u2014 a control-flow hijack primitive rather than a mere crash.\nA:H - Even unweaponized, dereferencing the freed glue and passing garbage to `irq_set_affinity_notifier()` corrupts unrelated IRQ descriptor state and oopses/panics the kernel during device teardown, and the double kref_put can prematurely free the cpu_rmap itself."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:14:18.959Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/981f339d2905b6a92ef59358158b326493aecac5"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1308bd0b24cb1d78fa2747d5fa3e055cc628a48"
        },
        {
          "url": "https://git.kernel.org/stable/c/cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000"
        },
        {
          "url": "https://git.kernel.org/stable/c/f748e15253833b771acbede14ea98f50831ac289"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6ed54dd90698dc0744d669524cc1c122ded8a16"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4"
        },
        {
          "url": "https://git.kernel.org/stable/c/67bca5f1d644f4e79b694abd8052a177de81c37f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e0473f1060aa49621d40a113afde24818101d37"
        }
      ],
      "title": "lib: cpu_rmap: Avoid use after free on rmap-\u003eobj array entries",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53484",
    "datePublished": "2025-10-01T11:42:52.590Z",
    "dateReserved": "2025-10-01T11:39:39.402Z",
    "dateUpdated": "2026-08-05T09:14:18.959Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2023-53484

CVE-2023-53484 (GCVE-0-2023-53484)

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