Vulnerability-Lookup

GHSA-FHV2-CF5F-4MPM

Vulnerability from github – Published: 2026-08-27 06:31 – Updated: 2026-08-27 06:31

Details

In the Linux kernel, the following vulnerability has been resolved:

crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req()

Perform rctx->cryptlen calculation in tegra_gcm_do_one_req() the same way it is done in tegra_ccm_crypt_init(). The current formulae may lead to a crash if a caller does not call tegra_gcm_setauthsize() and so ctx->authsize remains zero. Then a decrypt operation with incorrect rctx->cryptlen will lead to a write beyound rctx->dst_sg buffer.

As a follow-up cleanup delete struct tegra_aead_ctx->authsize field since it appears to be completely unused. Also simplify tegra_ccm_setauthsize() and tegra_gcm_setauthsize() functions respectively.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80522"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-26T15:17:05Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: tegra - fix rctx-\u003ecryptlen calculation in tegra_gcm_do_one_req()\n\nPerform rctx-\u003ecryptlen calculation in tegra_gcm_do_one_req() the same way\nit is done in tegra_ccm_crypt_init(). The current formulae may lead to a\ncrash if a caller does not call tegra_gcm_setauthsize() and so ctx-\u003eauthsize\nremains zero. Then a decrypt operation with incorrect rctx-\u003ecryptlen will\nlead to a write beyound rctx-\u003edst_sg buffer.\n\nAs a follow-up cleanup delete struct tegra_aead_ctx-\u003eauthsize field since\nit appears to be completely unused. Also simplify tegra_ccm_setauthsize()\nand tegra_gcm_setauthsize() functions respectively.",
  "id": "GHSA-fhv2-cf5f-4mpm",
  "modified": "2026-08-27T06:31:31Z",
  "published": "2026-08-27T06:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80522"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/360f2974fcea49c61f6d6f81554741a9eeee7168"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99a18e1d979e0fad3aaf9c65ae6696897c1d9869"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6237834d9994de209cb90c7a2c461247bce8e90"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd6991001bf0681ed0bcf21f9cc3d261d749b2bb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80522 (GCVE-0-2026-80522)

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-27 05:01

Title

crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req()

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req() Perform rctx->cryptlen calculation in tegra_gcm_do_one_req() the same way it is done in tegra_ccm_crypt_init(). The current formulae may lead to a crash if a caller does not call tegra_gcm_setauthsize() and so ctx->authsize remains zero. Then a decrypt operation with incorrect rctx->cryptlen will lead to a write beyound rctx->dst_sg buffer. As a follow-up cleanup delete struct tegra_aead_ctx->authsize field since it appears to be completely unused. Also simplify tegra_ccm_setauthsize() and tegra_gcm_setauthsize() functions respectively.

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

4 references

URL	Tags
https://git.kernel.org/stable/c/cd6991001bf0681ed…
https://git.kernel.org/stable/c/99a18e1d979e0fad3…
https://git.kernel.org/stable/c/c6237834d9994de20…
https://git.kernel.org/stable/c/360f2974fcea49c61…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < cd6991001bf0681ed0bcf21f9cc3d261d749b2bb (git) Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < 99a18e1d979e0fad3aaf9c65ae6696897c1d9869 (git) Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < c6237834d9994de209cb90c7a2c461247bce8e90 (git) Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < 360f2974fcea49c61f6d6f81554741a9eeee7168 (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/tegra/tegra-se-aes.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cd6991001bf0681ed0bcf21f9cc3d261d749b2bb",
              "status": "affected",
              "version": "0880bb3b00c855fc244b7177ffdaafef4d0aa1e0",
              "versionType": "git"
            },
            {
              "lessThan": "99a18e1d979e0fad3aaf9c65ae6696897c1d9869",
              "status": "affected",
              "version": "0880bb3b00c855fc244b7177ffdaafef4d0aa1e0",
              "versionType": "git"
            },
            {
              "lessThan": "c6237834d9994de209cb90c7a2c461247bce8e90",
              "status": "affected",
              "version": "0880bb3b00c855fc244b7177ffdaafef4d0aa1e0",
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            },
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              "status": "affected",
              "version": "0880bb3b00c855fc244b7177ffdaafef4d0aa1e0",
              "versionType": "git"
            }
          ]
        },
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/tegra/tegra-se-aes.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.105",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.46",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.10",
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                },
                {
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                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.10",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: tegra - fix rctx-\u003ecryptlen calculation in tegra_gcm_do_one_req()\n\nPerform rctx-\u003ecryptlen calculation in tegra_gcm_do_one_req() the same way\nit is done in tegra_ccm_crypt_init(). The current formulae may lead to a\ncrash if a caller does not call tegra_gcm_setauthsize() and so ctx-\u003eauthsize\nremains zero. Then a decrypt operation with incorrect rctx-\u003ecryptlen will\nlead to a write beyound rctx-\u003edst_sg buffer.\n\nAs a follow-up cleanup delete struct tegra_aead_ctx-\u003eauthsize field since\nit appears to be completely unused. Also simplify tegra_ccm_setauthsize()\nand tegra_gcm_setauthsize() functions respectively."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is in the Tegra Security Engine gcm(aes) driver reached via the kernel crypto API (AF_ALG socket syscalls); major network consumers call setauthsize and are not affected, and the driver only exists on Tegra234 platforms with TEGRA_HOST1X.\nAC:L - On affected Tegra systems with tegra-se loaded, an attacker reliably triggers the bug by issuing a GCM decrypt through AF_ALG without calling ALG_SET_AEAD_AUTHSIZE, relying on the default 16-byte tag while ctx-\u003eauthsize remains zero.\nPR:L - Triggering tegra GCM decrypt via AF_ALG requires only an unprivileged local user able to open AF_ALG sockets and bind to gcm(aes); no CAP_SYS_ADMIN, real root, or container-escaping capabilities are needed on standard configurations.\nUI:N - Exploitation requires no victim interaction such as mounting filesystems or opening files; the attacker directly submits crafted decrypt requests through the local crypto interface.\nS:U - Impact is kernel heap/memory corruption and potential privilege escalation within the same kernel security domain; it does not cross VM, container, or IOMMU boundaries.\nC:H - The out-of-bounds write corrupts memory adjacent to the destination scatterlist buffer; such heap corruption can expose kernel pointers or other sensitive data and is rated High per memory-corruption guidance.\nI:H - Decrypt uses an inflated cryptlen so scatterwalk_map_and_copy writes up to 16 bytes beyond the caller-allocated dst_sg buffer with no bounds checking, constituting an exploitable out-of-bounds write primitive.\nA:H - Writing past the destination scatterlist can corrupt adjacent kernel structures and cause kernel oops or panic; the fix commit explicitly describes this as a crash-causing out-of-bounds write condition."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-27T05:01:18.823Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/cd6991001bf0681ed0bcf21f9cc3d261d749b2bb"
        },
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          "url": "https://git.kernel.org/stable/c/99a18e1d979e0fad3aaf9c65ae6696897c1d9869"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6237834d9994de209cb90c7a2c461247bce8e90"
        },
        {
          "url": "https://git.kernel.org/stable/c/360f2974fcea49c61f6d6f81554741a9eeee7168"
        }
      ],
      "title": "crypto: tegra - fix rctx-\u003ecryptlen calculation in tegra_gcm_do_one_req()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80522",
    "datePublished": "2026-08-26T14:37:03.180Z",
    "dateReserved": "2026-08-26T14:34:25.763Z",
    "dateUpdated": "2026-08-27T05:01:18.823Z",
    "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.

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.
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