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

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-27 05:01
VLAI
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < cd6991001bf0681ed0bcf21f9cc3d261d749b2bb (git)
Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < 99a18e1d979e0fad3aaf9c65ae6696897c1d9869 (git)
Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < c6237834d9994de209cb90c7a2c461247bce8e90 (git)
Affected: 0880bb3b00c855fc244b7177ffdaafef4d0aa1e0 , < 360f2974fcea49c61f6d6f81554741a9eeee7168 (git)
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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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          "programFiles": [
            "drivers/crypto/tegra/tegra-se-aes.c"
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          "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."
        }
      ],
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            "baseSeverity": "HIGH",
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            "version": "3.1"
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              "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."
            }
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        "dateUpdated": "2026-08-27T05:01:18.823Z",
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      ],
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    "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",
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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.

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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.


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