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ipvs: clear the svc scheduler ptr early on edit

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-53270

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-53270

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "d10730a1f2caf08088e0db1b19b242f3e6fa5f06",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "e4feec3174036ba772006be74beee0efa09a9eb8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "7d4f5004511757e3984901ffb412fcf858d80ed5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "c6376b9b1b4d2bad638256b1b3588e073344ae69",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "14e4689c113b4c06af1069364ade24fdd7055f33",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "25918720ba97f974a4f8d433b5a0132c5b43f6f3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "05f00505a89acd21f5d0d20f5797dfbc4cf85243",
        "lessThan": "193989cc6d80dd8e0460fb3992e69fa03bf0ff9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c803fddd2a95a70873c68dbff42d4c59fd2e674e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4ec8fb23158797affae7993c15beba080488482f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3.18.23",
        "lessThan": "3.19",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "4.1.11",
        "lessThan": "4.2",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "include/net/ip_vs.h",
      "net/netfilter/ipvs/ip_vs_ctl.c",
      "net/netfilter/ipvs/ip_vs_sched.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.2"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.2",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.259",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.210",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.176",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.143",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.94",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.36",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.13",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "include/net/ip_vs.h",
      "net/netfilter/ipvs/ip_vs_ctl.c",
      "net/netfilter/ipvs/ip_vs_sched.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-53270

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40801 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-53270 · Revision 1Source updated