Skip to content
Heist/ feed
High

net/sched: sch_qfq: Fix race condition on qfq_aggregate

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.

Announced Source revision 1
Original source ↗

CVE-2025-38477

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-2025-38477

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": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "aa7a22c4d678bf649fd3a1d27debec583563414d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "d841aa5518508ab195b6781ad0d73ee378d713dd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "c6df794000147a3a02f79984aada4ce83f8d0a1e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "466e10194ab81caa2ee6a332d33ba16bcceeeba6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "fbe48f06e64134dfeafa89ad23387f66ebca3527",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "a6d735100f602c830c16d69fb6d780eebd8c9ae1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "c000a3a330d97f6c073ace5aa5faf94b9adb4b79",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
        "lessThan": "5e28d5a3f774f118896aec17a3a20a9c5c9dfc64",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/sched/sch_qfq.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.8",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.4.297",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.241",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.190",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.147",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.100",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.15.8",
        "versionType": "semver",
        "lessThanOrEqual": "6.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.16",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/sched/sch_qfq.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-38477

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#27041 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement