CVE-2026-74360 (GCVE-0-2026-74360)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:58 – Updated: 2026-08-17 05:17
VLAI
Title
bpf: Reject exclusive maps for bpf_map_elem iterators
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject exclusive maps for bpf_map_elem iterators Exclusive maps (aka excl_prog_hash) are meant to be reachable only from the single program whose hash matches. This is enforced by check_map_prog_compatibility() when the map is referenced from a program such as signed BPF loaders. A bpf_map_elem iterator, however, binds its target map at attach time in bpf_iter_attach_map() instead of referencing it from the program, so the exclusivity check is never reached. On top of that, the iterator exposes the map value as a writable buffer.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: baefdbdf6812e120c9fba9cfb101d3656f478026 , < 5cf2c85b1231218a3e3e9f188afb4fe2e17903d5 (git)
Affected: baefdbdf6812e120c9fba9cfb101d3656f478026 , < c3da741d5b2119c61c4498bc936f0fc1dbc3c79b (git)
Affected: baefdbdf6812e120c9fba9cfb101d3656f478026 , < 3c56ee343f9412d81918635c3e25e22a5dd6d87e (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject exclusive maps for bpf_map_elem iterators\n\nExclusive maps (aka excl_prog_hash) are meant to be reachable only\nfrom the single program whose hash matches. This is enforced by\ncheck_map_prog_compatibility() when the map is referenced from a\nprogram such as signed BPF loaders.\n\nA bpf_map_elem iterator, however, binds its target map at attach\ntime in bpf_iter_attach_map() instead of referencing it from the\nprogram, so the exclusivity check is never reached. On top of that,\nthe iterator exposes the map value as a writable buffer."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:17:54.663Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/3c56ee343f9412d81918635c3e25e22a5dd6d87e"
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    "datePublished": "2026-08-15T05:58:44.158Z",
    "dateReserved": "2026-08-15T05:44:03.887Z",
    "dateUpdated": "2026-08-17T05:17:54.663Z",
    "state": "PUBLISHED"
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      "percentile": "0.06288"
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject exclusive maps for bpf_map_elem iterators\n\nExclusive maps (aka excl_prog_hash) are meant to be reachable only\nfrom the single program whose hash matches. This is enforced by\ncheck_map_prog_compatibility() when the map is referenced from a\nprogram such as signed BPF loaders.\n\nA bpf_map_elem iterator, however, binds its target map at attach\ntime in bpf_iter_attach_map() instead of referencing it from the\nprogram, so the exclusivity check is never reached. On top of that,\nthe iterator exposes the map value as a writable buffer."
          }
        ],
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        "lastModified": "2026-08-17T06:19:30.767",
        "metrics": {},
        "published": "2026-08-15T06:22:37.567",
        "references": [
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      "cve": "CVE-2026-74360",
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      "product_status:known_affected": "184",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bpf: Reject exclusive maps for bpf_map_elem iterators",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74360.json",
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74360.json",
      "version": "2"
    }
  }
}



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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.
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  • 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.