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CVE-2023-53702

Estado: AplazadaSin puntuar—

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

s390/crypto: use vector instructions only if available for ChaCha20

Commit 349d03ffd5f6 ("crypto: s390 - add crypto library interface for ChaCha20") added a library interface to the s390 specific ChaCha20 implementation. However no check was added to verify if the required facilities are installed before branching into the assembler code.

If compiled into the kernel, this will lead to the following crash, if vector instructions are not available:

Fix this by adding a missing MACHINE_HAS_VX check.

[agordeev@linux.ibm.com: remove duplicates in commit message]

Detalles técnicos trazas, registros y código del informe original
data exception: 0007 ilc:3 [#1] SMP
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.3.0-rc7+ #11
Hardware name: IBM 3931 A01 704 (KVM/Linux)
Krnl PSW : 0704e00180000000 000000001857277a (chacha20_vx+0x32/0x818)
           R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3
Krnl GPRS: 0000037f0000000a ffffffffffffff60 000000008184b000 0000000019f5c8e6
           0000000000000109 0000037fffb13c58 0000037fffb13c78 0000000019bb1780
           0000037fffb13c58 0000000019f5c8e6 000000008184b000 0000000000000109
           00000000802d8000 0000000000000109 0000000018571ebc 0000037fffb13718
Krnl Code: 000000001857276a: c07000b1f80b        larl    %r7,0000000019bb1780
           0000000018572770: a708000a            lhi     %r0,10
          #0000000018572774: e78950000c36        vlm     %v24,%v25,0(%r5),0
          >000000001857277a: e7a060000806        vl      %v26,0(%r6),0
           0000000018572780: e7bf70004c36        vlm     %v27,%v31,0(%r7),4
           0000000018572786: e70b00000456        vlr     %v0,%v27
           000000001857278c: e71800000456        vlr     %v1,%v24
           0000000018572792: e74b00000456        vlr     %v4,%v27
Call Trace:
 [<000000001857277a>] chacha20_vx+0x32/0x818
Last Breaking-Event-Address:
 [<0000000018571eb6>] chacha20_crypt_s390.constprop.0+0x6e/0xd8
---[ end trace 0000000000000000 ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-53702",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "349d03ffd5f62c298fd667ffa397c3fdc5c6194b",
              "lessThan": "25e8d30507aa2f251152df1af7809e85b5538f4a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "349d03ffd5f62c298fd667ffa397c3fdc5c6194b",
              "lessThan": "debb7797bba0caffdbdadc3e7968bb2c414f50da",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "349d03ffd5f62c298fd667ffa397c3fdc5c6194b",
              "lessThan": "8703dd6b238da0ec6c276e53836f8200983d3d9b",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "arch/s390/crypto/chacha-glue.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.19",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.30",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.3.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/s390/crypto/chacha-glue.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-22T14:15:44.760",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/25e8d30507aa2f251152df1af7809e85b5538f4a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8703dd6b238da0ec6c276e53836f8200983d3d9b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/debb7797bba0caffdbdadc3e7968bb2c414f50da",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/crypto: use vector instructions only if available for ChaCha20\n\nCommit 349d03ffd5f6 (\"crypto: s390 - add crypto library interface for\nChaCha20\") added a library interface to the s390 specific ChaCha20\nimplementation. However no check was added to verify if the required\nfacilities are installed before branching into the assembler code.\n\nIf compiled into the kernel, this will lead to the following crash,\nif vector instructions are not available:\n\ndata exception: 0007 ilc:3 [#1] SMP\nModules linked in:\nCPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.3.0-rc7+ #11\nHardware name: IBM 3931 A01 704 (KVM/Linux)\nKrnl PSW : 0704e00180000000 000000001857277a (chacha20_vx+0x32/0x818)\n           R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\nKrnl GPRS: 0000037f0000000a ffffffffffffff60 000000008184b000 0000000019f5c8e6\n           0000000000000109 0000037fffb13c58 0000037fffb13c78 0000000019bb1780\n           0000037fffb13c58 0000000019f5c8e6 000000008184b000 0000000000000109\n           00000000802d8000 0000000000000109 0000000018571ebc 0000037fffb13718\nKrnl Code: 000000001857276a: c07000b1f80b        larl    %r7,0000000019bb1780\n           0000000018572770: a708000a            lhi     %r0,10\n          #0000000018572774: e78950000c36        vlm     %v24,%v25,0(%r5),0\n          >000000001857277a: e7a060000806        vl      %v26,0(%r6),0\n           0000000018572780: e7bf70004c36        vlm     %v27,%v31,0(%r7),4\n           0000000018572786: e70b00000456        vlr     %v0,%v27\n           000000001857278c: e71800000456        vlr     %v1,%v24\n           0000000018572792: e74b00000456        vlr     %v4,%v27\nCall Trace:\n [<000000001857277a>] chacha20_vx+0x32/0x818\nLast Breaking-Event-Address:\n [<0000000018571eb6>] chacha20_crypt_s390.constprop.0+0x6e/0xd8\n---[ end trace 0000000000000000 ]---\nKernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b\n\nFix this by adding a missing MACHINE_HAS_VX check.\n\n[agordeev@linux.ibm.com: remove duplicates in commit message]"
    }
  ],
  "lastModified": "2026-06-17T06:45:54.827",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}