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bpf,fork: wipe ->bpf_storage before bailouts that access it

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: bpf,fork: wipe ->bpf_storage before bailouts that access it Currently, copy_process() can bail out to free_task() before p->bpf_storage has been initialized, with this call graph (shown here for the !CONFIG_MEMCG case): copy_process dup_task_struct arch_dup_task_struct [copies the entire task_struct, including ->bpf_storage member] [RLIMIT_NPROC check fails] delayed_free_task free_task bpf_task_storage_free rcu_dereference(task->bpf_storage) bpf_local_storage_destroy In this case, the nascent task's ->bpf_storage member that bpf_local_storage_destroy() operates on is a plain copy of the parent's ->bpf_storage pointer, not a real initialized pointer. This leads to badness (kernel hangs, UAF). This is reachable as long as the process calling fork() has been inserted into a task storage map.

Announced Source revision 1
Original source ↗

CVE-2026-72110

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-2026-72110

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": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
        "lessThan": "7df67a4799067a59e6a2d53f8059a6be6e73e678",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
        "lessThan": "aff686efd38728e06daf12417a0d7ed454ce4cff",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
        "lessThan": "c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
        "lessThan": "9cff220ddb65b022cc668bb652200742476e744c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
        "lessThan": "c4f626ddf2350652ad2f79daf1f10847f3f6eabd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
        "lessThan": "43f0005f81b8ce3be962d653cde8db9022f1e9b0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a10787e6d58c24b51e91c19c6d16c5da89fcaa4b",
        "lessThan": "9b51a6155d14389876916726430da30eabb1d4ed",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "kernel/fork.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.217",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.184",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "kernel/fork.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72110

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#32940 · Revision 1
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Publisher date
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