CVE-2026-89988

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: kprobes: Protect kprobe_blacklist with RCU __within_kprobe_blacklist() traverses kprobe_blacklist without holding kprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist() removes blacklist entries and immediately frees them with kfree(). A concurrent call to within_kprobe_blacklist() can therefore dereference freed memory. Furthermore, within_kprobe_blacklist() can be called in atomic or non-preemptible contexts where the sleeping kprobe_mutex cannot be taken. Protect kprobe_blacklist with RCU. Use guard(rcu)() and list_for_each_entry_rcu() for traversal, list_add_tail_rcu() for insertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim entries safely after a grace period.

Severity

HIGH

CVSS score

7.8 (v3.1)

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-16 11:17:09.890000

Last modified

2026-10-30 13:20:38.003000

View original CVE JSON

{
  "id": "CVE-2026-89988",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-16T11:17:09.890",
  "lastModified": "2026-10-30T13:20:38.003",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: Protect kprobe_blacklist with RCU\n\n__within_kprobe_blacklist() traverses kprobe_blacklist without holding\nkprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist()\nremoves blacklist entries and immediately frees them with kfree().\nA concurrent call to within_kprobe_blacklist() can therefore dereference\nfreed memory.\n\nFurthermore, within_kprobe_blacklist() can be called in atomic or\nnon-preemptible contexts where the sleeping kprobe_mutex cannot be taken.\n\nProtect kprobe_blacklist with RCU. Use guard(rcu)() and\nlist_for_each_entry_rcu() for traversal, list_add_tail_rcu() for\ninsertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim\nentries safely after a grace period."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "include/linux/kprobes.h",
            "kernel/kprobes.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "3fb8386682ef4d0858c38bf0d8d8a47ba171fa23",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "5d97a13defc648c64d138145ace429b6a3d08943",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "8f406205003f741225f620f0e357ca0de71d45e3",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "630ed8734a02b992e8a97538179c2ece42c5210f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "518d9b5568bb06f86e4434f7a30faa9612ea91ad",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "5da247e4d1e8661d4d6f997101d59967e8994e32",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "6e62cf983a2bd547e6bbd3f935539233e5f97f8f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "376e242429bf8539ef39a080ac113c8799840b13",
              "lessThan": "0c4256196b3a105307e2235fbfd85e768bbcdd0f",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "include/linux/kprobes.h",
            "kernel/kprobes.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "3.16",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "3.16",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.273",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.224",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.188",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.157",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.110",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.51",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.5",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "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
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3fb8386682ef4d0858c38bf0d8d8a47ba171fa23",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5d97a13defc648c64d138145ace429b6a3d08943",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}