FKIE_CVE-2026-63805

Vulnerability from fkie_nvd - Published: 2026-07-19 12:16 - Updated: 2026-07-20 15:16
Severity
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: crypto: nx - fix nx_crypto_ctx_exit argument nx_crypto_ctx_shash_exit calls nx_crypto_ctx_exit with crypto_shash_ctx(...) but crypto_shash_ctx gives a nx_crypto_ctx *, not a crypto_tfm *. Fix the type in nx_crypto_ctx_exit and drop the bogus crypto_tfm_ctx call. This fixes the following oops: BUG: Unable to handle kernel data access at 0xc0403effffffffc8 Faulting instruction address: 0xc000000000396cb4 Oops: Kernel access of bad area, sig: 11 [#15] Call Trace: nx_crypto_ctx_shash_exit+0x24/0x60 crypto_shash_exit_tfm+0x28/0x40 crypto_destroy_tfm+0x98/0x140 crypto_exit_ahash_using_shash+0x20/0x40 crypto_destroy_tfm+0x98/0x140 hash_release+0x1c/0x30 alg_sock_destruct+0x38/0x60 __sk_destruct+0x48/0x2b0 af_alg_release+0x58/0xb0 __sock_release+0x68/0x150 sock_close+0x20/0x40 __fput+0x110/0x3a0 sys_close+0x48/0xa0 system_call_exception+0x140/0x2d0 system_call_common+0xf4/0x258 .. which came from hardlink(1) opportunistically using AF_ALG. The same problem exists with nx_crypto_ctx_skcipher_exit getting a context it wasn't expecting, but apparently nobody hit that for years.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e67f504ee9ded15e256b64f4fde150e917381d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/833033e6e55acf11304ff7bbbdf18351d139c281
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8d8507a457667f23477a15496b91908a5b5b7cf3
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/nx/nx.c",
            "drivers/crypto/nx/nx.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8d8507a457667f23477a15496b91908a5b5b7cf3",
              "status": "affected",
              "version": "bfd9efddf990d152dc9912fdca520c5e1e19e1e2",
              "versionType": "git"
            },
            {
              "lessThan": "833033e6e55acf11304ff7bbbdf18351d139c281",
              "status": "affected",
              "version": "bfd9efddf990d152dc9912fdca520c5e1e19e1e2",
              "versionType": "git"
            },
            {
              "lessThan": "4e67f504ee9ded15e256b64f4fde150e917381d7",
              "status": "affected",
              "version": "bfd9efddf990d152dc9912fdca520c5e1e19e1e2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/nx/nx.c",
            "drivers/crypto/nx/nx.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: nx - fix nx_crypto_ctx_exit argument\n\nnx_crypto_ctx_shash_exit calls nx_crypto_ctx_exit with crypto_shash_ctx(...)\nbut crypto_shash_ctx gives a nx_crypto_ctx *, not a crypto_tfm *.\n\nFix the type in nx_crypto_ctx_exit and drop the bogus crypto_tfm_ctx\ncall.\n\nThis fixes the following oops:\n\n  BUG: Unable to handle kernel data access at 0xc0403effffffffc8\n  Faulting instruction address: 0xc000000000396cb4\n  Oops: Kernel access of bad area, sig: 11 [#15]\n  Call Trace:\n   nx_crypto_ctx_shash_exit+0x24/0x60\n   crypto_shash_exit_tfm+0x28/0x40\n   crypto_destroy_tfm+0x98/0x140\n   crypto_exit_ahash_using_shash+0x20/0x40\n   crypto_destroy_tfm+0x98/0x140\n   hash_release+0x1c/0x30\n   alg_sock_destruct+0x38/0x60\n   __sk_destruct+0x48/0x2b0\n   af_alg_release+0x58/0xb0\n   __sock_release+0x68/0x150\n   sock_close+0x20/0x40\n   __fput+0x110/0x3a0\n   sys_close+0x48/0xa0\n   system_call_exception+0x140/0x2d0\n   system_call_common+0xf4/0x258\n\n.. which came from hardlink(1) opportunistically using AF_ALG.\n\nThe same problem exists with nx_crypto_ctx_skcipher_exit getting a context\nit wasn\u0027t expecting, but apparently nobody hit that for years."
    }
  ],
  "id": "CVE-2026-63805",
  "lastModified": "2026-07-20T15:16:47.267",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-19T12:16:53.230",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4e67f504ee9ded15e256b64f4fde150e917381d7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/833033e6e55acf11304ff7bbbdf18351d139c281"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d8507a457667f23477a15496b91908a5b5b7cf3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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