FKIE_CVE-2026-53270

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-06-30 14:44
Severity
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: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->scheduler ptr after the scheduler module initiates RCU callbacks. This can cause packets to use the old scheduler at the time when svc->sched_data is already freed after RCU grace period. Fix it by clearing the ptr early in ip_vs_unbind_scheduler(), before the done_service method schedules any RCU callbacks. Also, if the new scheduler fails to initialize when replacing the old scheduler, try to restore the old scheduler while still returning the error code.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/ip_vs.h",
            "net/netfilter/ipvs/ip_vs_ctl.c",
            "net/netfilter/ipvs/ip_vs_sched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d10730a1f2caf08088e0db1b19b242f3e6fa5f06",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "lessThan": "e4feec3174036ba772006be74beee0efa09a9eb8",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "lessThan": "7d4f5004511757e3984901ffb412fcf858d80ed5",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "lessThan": "c6376b9b1b4d2bad638256b1b3588e073344ae69",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "lessThan": "14e4689c113b4c06af1069364ade24fdd7055f33",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "lessThan": "25918720ba97f974a4f8d433b5a0132c5b43f6f3",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "lessThan": "19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "lessThan": "193989cc6d80dd8e0460fb3992e69fa03bf0ff9b",
              "status": "affected",
              "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c803fddd2a95a70873c68dbff42d4c59fd2e674e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ec8fb23158797affae7993c15beba080488482f",
              "versionType": "git"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.23",
              "versionType": "semver"
            },
            {
              "lessThan": "4.2",
              "status": "affected",
              "version": "4.1.11",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/ip_vs.h",
            "net/netfilter/ipvs/ip_vs_ctl.c",
            "net/netfilter/ipvs/ip_vs_sched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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\nipvs: clear the svc scheduler ptr early on edit\n\nip_vs_edit_service() while unbinding the old scheduler clears\nthe svc-\u003escheduler ptr after the scheduler module initiates\nRCU callbacks. This can cause packets to use the old\nscheduler at the time when svc-\u003esched_data is already freed\nafter RCU grace period.\n\nFix it by clearing the ptr early in ip_vs_unbind_scheduler(),\nbefore the done_service method schedules any RCU callbacks.\n\nAlso, if the new scheduler fails to initialize when replacing\nthe old scheduler, try to restore the old scheduler while still\nreturning the error code."
    }
  ],
  "id": "CVE-2026-53270",
  "lastModified": "2026-06-30T14:44:27.313",
  "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"
      }
    ]
  },
  "published": "2026-06-25T09:16:45.123",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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