Vulnerability-Lookup

CVE-2026-53137 (GCVE-0-2026-53137)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-06-25 08:38

Title

drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size [Why & How] During HDCP 2.x repeater authentication over HDMI, the driver reads the sink's RxStatus register and extracts a 10-bit message size field (max value 1023). This value is used as the read length for the ReceiverID list without being clamped to the size of the destination buffer rx_id_list[177]. A malicious HDMI repeater could advertise a message size larger than the buffer, causing an out-of-bounds write during the I2C read. Clamp the read length in mod_hdcp_read_rx_id_list() to the size of the rx_id_list buffer, matching the approach already used in the DP branch. (cherry picked from commit 229212219e4247d9486f8ba41ef087358490be09)

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/3c4444aec06c74fbc…
https://git.kernel.org/stable/c/91fb41218c413989d…
https://git.kernel.org/stable/c/964e50ef7b8f09815…
https://git.kernel.org/stable/c/79e0273272a05fb26…
https://git.kernel.org/stable/c/bfba882cfcd08f654…
https://git.kernel.org/stable/c/1906064d50d194a14…
https://git.kernel.org/stable/c/98cfb7530ea91d8e5…
https://git.kernel.org/stable/c/f0f3981c43b32cadf…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < 3c4444aec06c74fbc05661f370954ac814963c38 (git) Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < 91fb41218c413989d8b6c837748751454b452d68 (git) Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < 964e50ef7b8f09815a7d05b8326af700f8d5bc96 (git) Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < 79e0273272a05fb26f9b1e55bf1a52eefc3b7b35 (git) Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < bfba882cfcd08f6540f72f48e786b6404f5d2c5b (git) Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < 1906064d50d194a145486e5caf3db3e708b6f6ef (git) Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < 98cfb7530ea91d8e5e928285cdce58e1131f6e83 (git) Affected: eff682f83c9c2030761e7536c5d97e1b20f71c15 , < f0f3981c43b32cadfe373d636d9e9ca522bb3702 (git)	guessed
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)	guessed

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A malicious HDMI repeater could advertise a message\\nsize larger than the buffer, causing an out-of-bounds write during the\\nI2C read.\\n\\nClamp the read length in mod_hdcp_read_rx_id_list() to the size of the\\nrx_id_list buffer, matching the approach already used in the DP branch.\\n\\n(cherry picked from commit 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-31T20:51:31+00:00",
      "cve": "CVE-2026-53137",
      "id": "CVE-2026-53137",
      "initial_release_date": "2026-06-25T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53137.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T16:44:51Z",
      "cve": "CVE-2026-53137",
      "id": "CVE-2026-53137",
      "initial_release_date": "2026-06-26T02:12:26Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "554",
      "product_status:known_not_affected": "164",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53137",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53137.json",
      "version": "10"
    }
  }
}

WID-SEC-W-2026-2077

Vulnerability from csaf_certbund - Published: 2026-06-24 22:00 - Updated: 2026-08-10 22:00

Summary

Linux Kernel: Mehrere Schwachstellen

Severity

Hoch

Scope

331 vulnerabilities in this advisory, including CVE-2026-53137.

CVE-2026-53137

Known affected: 11 products

Open the full advisory

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.

Detection rules are retrieved from Rulezet.

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.