{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-crypto-profile.c",
            "block/blk-crypto.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "701a8220762ff90615dc91d3543f789391b63298",
              "status": "affected",
              "version": "1b2628397058ebce7277480960b29c788138de90",
              "versionType": "git"
            },
            {
              "lessThan": "5bb4005fb667c6e2188fa87950f8d5faf2994410",
              "status": "affected",
              "version": "1b2628397058ebce7277480960b29c788138de90",
              "versionType": "git"
            },
            {
              "lessThan": "64ef787bb1588475163069c2e62fdd8f6c27b1f6",
              "status": "affected",
              "version": "1b2628397058ebce7277480960b29c788138de90",
              "versionType": "git"
            },
            {
              "lessThan": "809a5be62e92a444a3c3d7b9f438019d0b322f55",
              "status": "affected",
              "version": "1b2628397058ebce7277480960b29c788138de90",
              "versionType": "git"
            },
            {
              "lessThan": "5c62852942667c613de0458fc797c5b8c36112b5",
              "status": "affected",
              "version": "1b2628397058ebce7277480960b29c788138de90",
              "versionType": "git"
            },
            {
              "lessThan": "5c7cb94452901a93e90c2230632e2c12a681bc92",
              "status": "affected",
              "version": "1b2628397058ebce7277480960b29c788138de90",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "block/blk-crypto-profile.c",
            "block/blk-crypto.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.180",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.180",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.111",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.28",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.15",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3.2",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-crypto: make blk_crypto_evict_key() more robust\n\nIf blk_crypto_evict_key() sees that the key is still in-use (due to a\nbug) or that -\u003ekeyslot_evict failed, it currently just returns while\nleaving the key linked into the keyslot management structures.\n\nHowever, blk_crypto_evict_key() is only called in contexts such as inode\neviction where failure is not an option.  So actually the caller\nproceeds with freeing the blk_crypto_key regardless of the return value\nof blk_crypto_evict_key().\n\nThese two assumptions don\u0027t match, and the result is that there can be a\nuse-after-free in blk_crypto_reprogram_all_keys() after one of these\nerrors occurs.  (Note, these errors *shouldn\u0027t* happen; we\u0027re just\ntalking about what happens if they do anyway.)\n\nFix this by making blk_crypto_evict_key() unlink the key from the\nkeyslot management structures even on failure.\n\nAlso improve some comments."
        }
      ],
      "metrics": [
        {
          "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 vulnerable path is reached through ordinary filesystem syscalls (create/write/unlink causing inode eviction) on a locally-mounted fscrypt-encrypted volume backed by UFS/eMMC inline-crypto hardware; there is no remote protocol handler involved.\nAC:L - The attacker drives the eviction side of the race directly and can retry unboundedly \u2014 a tight create/write/unlink loop over per-file-key files generates thousands of `blk_crypto_evict_key()` calls per second against in-flight blk-mq requests, and UFS runtime-PM resume (which calls `blk_crypto_reprogram_all_keys()`) can be induced by alternating I/O bursts with idle periods.\nPR:L - Only an unprivileged local account with write access to an fscrypt-encrypted directory is needed \u2014 any sandboxed Android app in its own `/data/data` directory, or any user with an encrypted home \u2014 and no capability or namespace check exists anywhere on the path from `evict_inode()` to `__blk_crypto_evict_key()`.\nUI:N - The attacker performs every step itself \u2014 writing files, forcing inode eviction, and idling the device to provoke a controller reset \u2014 with no action required from any other user or administrator.\nS:U - The use-after-free occurs on a kernel heap object and is exploited within the kernel\u0027s own security authority; no VM, IOMMU, or hypervisor boundary is crossed.\nC:H - The freed object is a `struct blk_crypto_key` holding raw key material, and `blk_crypto_reprogram_all_keys()` reads it after free and programs the (groomable) contents into a hardware keyslot; additionally the stale pointer-keyed hash entry causes a reallocated key to reuse a slot holding a different key, exposing file plaintext across encryption boundaries, and the UAF read primitive is generally leverageable for kernel memory disclosure.\nI:H - A use-after-free on a slab object whose lifetime the attacker controls permits heap spraying to place attacker-chosen data where the kernel expects a key, yielding a write/control primitive; independently, the wrong-key confusion silently encrypts user data at rest under the wrong key, corrupting it irrecoverably.\nA:H - Dereferencing the freed `blk_crypto_key` in `blk_crypto_reprogram_all_keys()` causes an oops or panic (plus the `WARN_ON_ONCE`/`WARN_ON` splats), and the attacker can repeat the trigger loop indefinitely to crash the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:14:40.430Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/701a8220762ff90615dc91d3543f789391b63298"
        },
        {
          "url": "https://git.kernel.org/stable/c/5bb4005fb667c6e2188fa87950f8d5faf2994410"
        },
        {
          "url": "https://git.kernel.org/stable/c/64ef787bb1588475163069c2e62fdd8f6c27b1f6"
        },
        {
          "url": "https://git.kernel.org/stable/c/809a5be62e92a444a3c3d7b9f438019d0b322f55"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c62852942667c613de0458fc797c5b8c36112b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c7cb94452901a93e90c2230632e2c12a681bc92"
        }
      ],
      "title": "blk-crypto: make blk_crypto_evict_key() more robust",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53536",
    "datePublished": "2025-10-04T15:16:47.304Z",
    "dateReserved": "2025-10-04T15:14:15.919Z",
    "dateUpdated": "2026-08-05T09:14:40.430Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}