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crypto: af_alg - zero initialize memory allocated via sock_kmalloc

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - zero initialize memory allocated via sock_kmalloc Several crypto user API contexts and requests allocated with sock_kmalloc() were left uninitialized, relying on callers to set fields explicitly. This resulted in the use of uninitialized data in certain error paths or when new fields are added in the future. The ACVP patches also contain two user-space interface files: algif_kpp.c and algif_akcipher.c. These too rely on proper initialization of their context structures. A particular issue has been observed with the newly added 'inflight' variable introduced in af_alg_ctx by commit: 67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests") Because the context is not memset to zero after allocation, the inflight variable has contained garbage values. As a result, af_alg_alloc_areq() has incorrectly returned -EBUSY randomly when the garbage value was interpreted as true: https://github.com/gregkh/linux/blame/master/crypto/af_alg.c#L1209 The check directly tests ctx->inflight without explicitly comparing against true/false. Since inflight is only ever set to true or false later, an uninitialized value has triggered -EBUSY failures. Zero-initializing memory allocated with sock_kmalloc() ensures inflight and other fields start in a known state, removing random issues caused by uninitialized data.

Announced Source revision 1
Original source ↗

CVE-2025-71113

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2025-71113

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
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Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "fe869cdb89c95d060c77eea20204d6c91f233b53",
        "lessThan": "e125c8e346e4eb7b3e854c862fcb4392bc13ddba",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe869cdb89c95d060c77eea20204d6c91f233b53",
        "lessThan": "543bf004e4eafbb302b1e6c78570d425d2ca13a0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe869cdb89c95d060c77eea20204d6c91f233b53",
        "lessThan": "f81244fd6b14fecfa93b66b6bb1d59f96554e550",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe869cdb89c95d060c77eea20204d6c91f233b53",
        "lessThan": "84238876e3b3b262cf62d5f4d1338e983fb27010",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe869cdb89c95d060c77eea20204d6c91f233b53",
        "lessThan": "5a4b65523608974a81edbe386f8a667a3e10c726",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe869cdb89c95d060c77eea20204d6c91f233b53",
        "lessThan": "51a5ab36084f3251ef87eda3e6a6236f6488925e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fe869cdb89c95d060c77eea20204d6c91f233b53",
        "lessThan": "6f6e309328d53a10c0fe1f77dec2db73373179b6",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "crypto/af_alg.c",
      "crypto/algif_hash.c",
      "crypto/algif_rng.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.38"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.38",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.248",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.198",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.120",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.64",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.3",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "crypto/af_alg.c",
      "crypto/algif_hash.c",
      "crypto/algif_rng.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-71113

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#39158 · Revision 1
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