Vulnerability-Lookup

FKIE_CVE-2021-47017

Vulnerability from fkie_nvd - Published: 2024-02-28 09:15 - Updated: 2026-08-04 10:16

Severity

8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: ath10k: Fix a use after free in ath10k_htc_send_bundle In ath10k_htc_send_bundle, the bundle_skb could be freed by dev_kfree_skb_any(bundle_skb). But the bundle_skb is used later by bundle_skb->len. As skb_len = bundle_skb->len, my patch replaces bundle_skb->len to skb_len after the bundle_skb was freed.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath10k/htc.c"
          ],
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.8"
            },
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.10.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.11.*",
              "status": "unaffected",
              "version": "5.11.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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    },
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}

CVE-2021-47017 (GCVE-0-2021-47017)

Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2026-08-05 08:45

Title

ath10k: Fix a use after free in ath10k_htc_send_bundle

Summary

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:58 UTC

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/8bb054fb336f42500…
https://git.kernel.org/stable/c/3b1ac40c601214082…
https://git.kernel.org/stable/c/5e413c0831ff4700d…
https://git.kernel.org/stable/c/8392df5d7e0b6a7d2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c8334512f3dd1b94844baca629f9bedca4271593 , < 8bb054fb336f4250002fff4e0b075221c05c3c65 (git) Affected: c8334512f3dd1b94844baca629f9bedca4271593 , < 3b1ac40c6012140828caa79e592a438a18ebf71b (git) Affected: c8334512f3dd1b94844baca629f9bedca4271593 , < 5e413c0831ff4700d1739db3fa3ae9f859744676 (git) Affected: c8334512f3dd1b94844baca629f9bedca4271593 , < 8392df5d7e0b6a7d21440da1fc259f9938f4dec3 (git)
Linux	Linux	Affected: 5.8 Unaffected: 0 , < 5.8 (semver) Unaffected: 5.10.37 , ≤ 5.10.* (semver) Unaffected: 5.11.21 , ≤ 5.11.* (semver) Unaffected: 5.12.4 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.550Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3"
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        "title": "CVE Program Container"
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        "metrics": [
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              "value": "AV:A - The UAF is in the ath10k SDIO/HL WiFi HTT TX bundle path (ath10k_htc_send_hl \u2192 bundle_tx_work \u2192 ath10k_htc_send_bundle), reached when the host transmits over QCA SDIO WiFi; an in-range attacker on a hotspot/AP or busy STA link can induce that TX, so reachability is Adjacent 802.11, not routable Network or Local-only.\nAC:L - The free occurs on the documented send-failure path (credit consume returning -EAGAIN after the non-consuming build-time check, or hif_tx_sg failure), which an adjacent attacker can drive with sustained TX load; no race or layout outside attacker influence is required once bundling is active.\nPR:N - Triggering outbound WiFi TX and credit pressure needs no account or capability on the victim OS\u2014association/traffic from an adjacent peer is enough, with no CAP_NET_ADMIN or local login gate on this driver path.\nUI:N - Once the ath10k SDIO interface is up, the attacker can unilaterally generate traffic that queues bundled HTT TX; no extra victim action such as mounting a device or clicking is required.\nS:U - The dangling sk_buff access corrupts/discloses host-kernel heap state within the same kernel authority and does not cross a VM, IOMMU, or other distinct trust boundary.\nC:H - This is a use-after-free of a kmalloc-backed sk_buff (bundle_skb) after dev_kfree_skb_any; per kernel UAF guidance, reclaim of the freed object enables arbitrary kernel memory disclosure.\nI:H - The same sk_buff UAF is exploitable heap corruption that enables heap spray, arbitrary write, and control-flow hijack primitives beyond a pure crash.\nA:H - Post-free dereference of bundle_skb can oops/panic if the object/page is reclaimed or unmapped, so availability impact is High even without a full exploit."
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47017",
    "datePublished": "2024-02-28T08:13:32.739Z",
    "dateReserved": "2024-02-27T18:42:55.954Z",
    "dateUpdated": "2026-08-05T08:45:36.642Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

FKIE_CVE-2021-47017

CVE-2021-47017 (GCVE-0-2021-47017)

Tags

Sightings

Nomenclature

Related by attack behaviour