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EUVD-2026-309765

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:10

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:10:12.536452+00:00",
  "id": "EUVD-2026-309765"
}

CVE-2021-47482 (GCVE-0-2021-47482)

Vulnerability from cvelistv5 – Published: 2024-05-22 08:19 – Updated: 2026-05-11 13:55

Title

net: batman-adv: fix error handling

Summary

In the Linux kernel, the following vulnerability has been resolved: net: batman-adv: fix error handling Syzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem was in wrong error handling in batadv_mesh_init(). Before this patch batadv_mesh_init() was calling batadv_mesh_free() in case of any batadv_*_init() calls failure. This approach may work well, when there is some kind of indicator, which can tell which parts of batadv are initialized; but there isn't any. All written above lead to cleaning up uninitialized fields. Even if we hide ODEBUG warning by initializing bat_priv->nc.work, syzbot was able to hit GPF in batadv_nc_purge_paths(), because hash pointer in still NULL. [1] To fix these bugs we can unwind batadv_*_init() calls one by one. It is good approach for 2 reasons: 1) It fixes bugs on error handling path 2) It improves the performance, since we won't call unneeded batadv_*_free() functions. So, this patch makes all batadv_*_init() clean up all allocated memory before returning with an error to no call correspoing batadv_*_free() and open-codes batadv_mesh_free() with proper order to avoid touching uninitialized fields.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-22 14:23 UTC

CWE

CWE-544 - Missing Standardized Error Handling Mechanism

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/0c6b199f09be489c4…
https://git.kernel.org/stable/c/07533f1a673ce1126…
https://git.kernel.org/stable/c/e50f957652190b5a8…
https://git.kernel.org/stable/c/fbf150b16a3635634…
https://git.kernel.org/stable/c/6422e847189027399…
https://git.kernel.org/stable/c/b0a2cd38553c77928…
https://git.kernel.org/stable/c/a8f7359259dd5923a…
https://git.kernel.org/stable/c/6f68cd634856f8ca9…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 0c6b199f09be489c48622537a550787fc80aea73 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < e50f957652190b5a88a8ebce7e5ab14ebd0d3f00 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < fbf150b16a3635634b7dfb7f229d8fcd643c6c51 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 6422e8471890273994fe8cc6d452b0dcd2c9483e (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < b0a2cd38553c77928ef1646ed1518486b1e70ae8 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < a8f7359259dd5923adc6129284fdad12fc5db347 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 6f68cd634856f8ca93bafd623ba5357e0f648c68 (git)
Linux	Linux	Affected: 2.6.38 Unaffected: 0 , < 2.6.38 (semver) Unaffected: 4.4.293 , ≤ 4.4.* (semver) Unaffected: 4.9.289 , ≤ 4.9.* (semver) Unaffected: 4.14.254 , ≤ 4.14.* (semver) Unaffected: 4.19.215 , ≤ 4.19.* (semver) Unaffected: 5.4.157 , ≤ 5.4.* (semver) Unaffected: 5.10.77 , ≤ 5.10.* (semver) Unaffected: 5.14.16 , ≤ 5.14.* (semver) Unaffected: 5.15 , ≤ * (original_commit_for_fix)
linux	kernel	Affected: c6c8fea29769 , < 6f68cd634856 (custom) cpe:2.3:a:linux:kernel::::::::

Show details on NVD website

JSON

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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
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                "timestamp": "2024-05-22T14:23:49.834451Z",
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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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EUVD-2026-309765

CVE-2021-47482 (GCVE-0-2021-47482)

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Nomenclature

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