CVE-2026-98046 (GCVE-0-2026-98046)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:23 – Updated: 2026-09-25 10:23
VLAI
Title
bpf: Mark bpf_btf_find_by_name_kind() as sleepable
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Mark bpf_btf_find_by_name_kind() as sleepable When bpf_btf_find_by_name_kind() finds a type in module BTF, it returns a new BTF object fd through __btf_new_fd(). This reaches anon_inode_getfd(), which can sleep while allocating or expanding the current task fd table. The helper prototype does not set might_sleep, so the verifier allows the helper in non-sleepable contexts such as BPF timer callbacks. The fd allocation can then sleep in softirq context and install the fd into the interrupted task. Mark the helper as sleepable. This preserves calls from the main body of a sleepable syscall program while rejecting calls from its non-sleepable regions.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3d78417b60fba249cc555468cb72d96f5cde2964 , < 29e40175617216fbd4544529f6bfb51d1ab95ba1 (git)
Affected: 3d78417b60fba249cc555468cb72d96f5cde2964 , < 4d8784226bd3c6a707975081f986078f40456cec (git)
Affected: 3d78417b60fba249cc555468cb72d96f5cde2964 , < 17f54a8f2b9714529d56edbbe12d448ccdbbf469 (git)
Affected: 3d78417b60fba249cc555468cb72d96f5cde2964 , < 620614bf7672130c43b3cff375525a2202f61979 (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark bpf_btf_find_by_name_kind() as sleepable\n\nWhen bpf_btf_find_by_name_kind() finds a type in module BTF, it\nreturns a new BTF object fd through __btf_new_fd(). This reaches\nanon_inode_getfd(), which can sleep while allocating or expanding the\ncurrent task fd table.\n\nThe helper prototype does not set might_sleep, so the verifier allows\nthe helper in non-sleepable contexts such as BPF timer callbacks. The\nfd allocation can then sleep in softirq context and install the fd into\nthe interrupted task.\n\nMark the helper as sleepable. This preserves calls from the main body\nof a sleepable syscall program while rejecting calls from its\nnon-sleepable regions."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:23:56.691Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-09-25T10:23:56.691Z",
    "dateReserved": "2026-09-25T10:19:56.071Z",
    "dateUpdated": "2026-09-25T10:23:56.691Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-09-27",
      "epss": "0.00168",
      "percentile": "0.05392"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-28T01:29:52.000Z",
      "cve": "CVE-2026-98046",
      "id": "msrc_CVE-2026-98046",
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      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "bpf: Mark bpf_btf_find_by_name_kind() as sleepable",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark bpf_btf_find_by_name_kind() as sleepable\n\nWhen bpf_btf_find_by_name_kind() finds a type in module BTF, it\nreturns a new BTF object fd through __btf_new_fd(). This reaches\nanon_inode_getfd(), which can sleep while allocating or expanding the\ncurrent task fd table.\n\nThe helper prototype does not set might_sleep, so the verifier allows\nthe helper in non-sleepable contexts such as BPF timer callbacks. The\nfd allocation can then sleep in softirq context and install the fd into\nthe interrupted task.\n\nMark the helper as sleepable. This preserves calls from the main body\nof a sleepable syscall program while rejecting calls from its\nnon-sleepable regions."
          }
        ],
        "id": "CVE-2026-98046",
        "lastModified": "2026-09-25T11:17:33.440",
        "metrics": {},
        "published": "2026-09-25T11:17:33.440",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.