CVE-2022-49452

Estado: ModificadaMedia (5.5)—

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

dpaa2-eth: retrieve the virtual address before dma_unmap

The TSO header was DMA unmapped before the virtual address was retrieved and then used to free the buffer. This meant that we were actually removing the DMA map and then trying to search for it to help in retrieving the virtual address. This lead to a invalid virtual address being used in the kfree call.

Fix this by calling dpaa2_iova_to_virt() prior to the dma_unmap call.

(...)

Detalles técnicos trazas, registros y código del informe original

[  487.231819] Unable to handle kernel paging request at virtual address fffffd9807000008

[  487.354061] Hardware name: SolidRun LX2160A Honeycomb (DT)
[  487.359535] pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  487.366485] pc : kfree+0xac/0x304
[  487.369799] lr : kfree+0x204/0x304
[  487.373191] sp : ffff80000c4eb120
[  487.376493] x29: ffff80000c4eb120 x28: ffff662240c46400 x27: 0000000000000001
[  487.383621] x26: 0000000000000001 x25: ffff662246da0cc0 x24: ffff66224af78000
[  487.390748] x23: ffffad184f4ce008 x22: ffffad1850185000 x21: ffffad1838d13cec
[  487.397874] x20: ffff6601c0000000 x19: fffffd9807000000 x18: 0000000000000000
[  487.405000] x17: ffffb910cdc49000 x16: ffffad184d7d9080 x15: 0000000000004000
[  487.412126] x14: 0000000000000008 x13: 000000000000ffff x12: 0000000000000000
[  487.419252] x11: 0000000000000004 x10: 0000000000000001 x9 : ffffad184d7d927c
[  487.426379] x8 : 0000000000000000 x7 : 0000000ffffffd1d x6 : ffff662240a94900
[  487.433505] x5 : 0000000000000003 x4 : 0000000000000009 x3 : ffffad184f4ce008
[  487.440632] x2 : ffff662243eec000 x1 : 0000000100000100 x0 : fffffc0000000000
[  487.447758] Call trace:
[  487.450194]  kfree+0xac/0x304
[  487.453151]  dpaa2_eth_free_tx_fd.isra.0+0x33c/0x3e0 [fsl_dpaa2_eth]
[  487.459507]  dpaa2_eth_tx_conf+0x100/0x2e0 [fsl_dpaa2_eth]
[  487.464989]  dpaa2_eth_poll+0xdc/0x380 [fsl_dpaa2_eth]

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.48%
Percentil entre todas las CVEs puntuadas: 40
Fecha de la puntuación: 6/10/2026

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)

Linux — Linux Kernel

CWE

CWE-401

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-49452",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "3dc709e0cd47c602a8d1a6747f1a91e9737eeed3",
              "lessThan": "ba5fe3dd4833bbc03609c5c0c2dd2cea5fa5addf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3dc709e0cd47c602a8d1a6747f1a91e9737eeed3",
              "lessThan": "06d129946a71f3159b3b40ee95549183edf2c79d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.18.3",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-26T07:01:21.587",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/06d129946a71f3159b3b40ee95549183edf2c79d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ba5fe3dd4833bbc03609c5c0c2dd2cea5fa5addf",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-eth: retrieve the virtual address before dma_unmap\n\nThe TSO header was DMA unmapped before the virtual address was retrieved\nand then used to free the buffer. This meant that we were actually\nremoving the DMA map and then trying to search for it to help in\nretrieving the virtual address. This lead to a invalid virtual address\nbeing used in the kfree call.\n\nFix this by calling dpaa2_iova_to_virt() prior to the dma_unmap call.\n\n[  487.231819] Unable to handle kernel paging request at virtual address fffffd9807000008\n\n(...)\n\n[  487.354061] Hardware name: SolidRun LX2160A Honeycomb (DT)\n[  487.359535] pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[  487.366485] pc : kfree+0xac/0x304\n[  487.369799] lr : kfree+0x204/0x304\n[  487.373191] sp : ffff80000c4eb120\n[  487.376493] x29: ffff80000c4eb120 x28: ffff662240c46400 x27: 0000000000000001\n[  487.383621] x26: 0000000000000001 x25: ffff662246da0cc0 x24: ffff66224af78000\n[  487.390748] x23: ffffad184f4ce008 x22: ffffad1850185000 x21: ffffad1838d13cec\n[  487.397874] x20: ffff6601c0000000 x19: fffffd9807000000 x18: 0000000000000000\n[  487.405000] x17: ffffb910cdc49000 x16: ffffad184d7d9080 x15: 0000000000004000\n[  487.412126] x14: 0000000000000008 x13: 000000000000ffff x12: 0000000000000000\n[  487.419252] x11: 0000000000000004 x10: 0000000000000001 x9 : ffffad184d7d927c\n[  487.426379] x8 : 0000000000000000 x7 : 0000000ffffffd1d x6 : ffff662240a94900\n[  487.433505] x5 : 0000000000000003 x4 : 0000000000000009 x3 : ffffad184f4ce008\n[  487.440632] x2 : ffff662243eec000 x1 : 0000000100000100 x0 : fffffc0000000000\n[  487.447758] Call trace:\n[  487.450194]  kfree+0xac/0x304\n[  487.453151]  dpaa2_eth_free_tx_fd.isra.0+0x33c/0x3e0 [fsl_dpaa2_eth]\n[  487.459507]  dpaa2_eth_tx_conf+0x100/0x2e0 [fsl_dpaa2_eth]\n[  487.464989]  dpaa2_eth_poll+0xdc/0x380 [fsl_dpaa2_eth]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dpaa2-eth: recuperar la dirección virtual antes de dma_unmap El encabezado TSO fue desasignado por DMA antes de que se recuperara la dirección virtual y luego se usara para liberar el búfer. Esto significaba que en realidad estábamos eliminando el mapa DMA y luego tratando de buscarlo para ayudar a recuperar la dirección virtual. Esto llevó a que se usara una dirección virtual no válida en la llamada kfree. Solucione esto llamando a dpaa2_iova_to_virt() antes de la llamada dma_unmap. [ 487.231819] No se puede gestionar la solicitud de paginación del núcleo en la dirección virtual fffffd9807000008 (...) [ 487.354061] Hardware name: SolidRun LX2160A Honeycomb (DT) [ 487.359535] pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 487.366485] pc : kfree+0xac/0x304 [ 487.369799] lr : kfree+0x204/0x304 [ 487.373191] sp : ffff80000c4eb120 [ 487.376493] x29: ffff80000c4eb120 x28: ffff662240c46400 x27: 0000000000000001 [ 487.383621] x26: 0000000000000001 x25: ffff662246da0cc0 x24: ffff66224af78000 [ 487.390748] x23: ffffad184f4ce008 x22: ffffad1850185000 x21: ffffad1838d13cec [ 487.397874] x20: ffff6601c0000000 x19: fffffd9807000000 x18: 0000000000000000 [ 487.405000] x17: ffffb910cdc49000 x16: ffffad184d7d9080 x15: 0000000000004000 [ 487.412126] x14: 0000000000000008 x13: 000000000000ffff x12: 0000000000000000 [ 487.419252] x11: 0000000000000004 x10: 0000000000000001 x9 : ffffad184d7d927c [ 487.426379] x8 : 0000000000000000 x7 : 0000000ffffffd1d x6 : ffff662240a94900 [ 487.433505] x5 : 0000000000000003 x4 : 0000000000000009 x3 : ffffad184f4ce008 [ 487.440632] x2 : ffff662243eec000 x1 : 0000000100000100 x0 : fffffc0000000000 [ 487.447758] Call trace: [ 487.450194] kfree+0xac/0x304 [ 487.453151] dpaa2_eth_free_tx_fd.isra.0+0x33c/0x3e0 [fsl_dpaa2_eth] [ 487.459507] dpaa2_eth_tx_conf+0x100/0x2e0 [fsl_dpaa2_eth] [ 487.464989] dpaa2_eth_poll+0xdc/0x380 [fsl_dpaa2_eth] "
    }
  ],
  "lastModified": "2026-08-04T10:17:48.390",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2",
              "versionEndExcluding": "5.18.3",
              "versionStartIncluding": "5.18"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}