CVE-2025-68376

{
  "id": "CVE-2025-68376",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-12-24T11:16:01.193",
  "lastModified": "2026-10-21T13:18:23.520",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ETR: Fix ETR buffer use-after-free issue\n\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will point to the newly\nallocated memory(buf_new) and free the old memory(buf_old). But the\netr_buf that is being used by the ETR remains pointed to buf_old, not\nupdated to buf_new. In this case, it will result in a memory\nuse-after-free issue.\n\nFix this by checking ETR's mode before updating and releasing buf_old,\nif the mode is CS_MODE_SYSFS, then skip updating and releasing it."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncoresight: ETR: Solucionar el problema de uso después de liberación del búfer ETR\n\nCuando ETR está habilitado como CS_MODE_SYSFS, si el tamaño del búfer se cambia y se habilita de nuevo, actualmente sysfs_buf apuntará a la memoria recién asignada (buf_new) y liberará la memoria antigua (buf_old). Pero el etr_buf que está siendo utilizado por el ETR permanece apuntando a buf_old, no actualizado a buf_new. En este caso, resultará en un problema de uso después de liberación de memoria.\n\nSolucione esto verificando el modo de ETR antes de actualizar y liberar buf_old; si el modo es CS_MODE_SYSFS, entonces omita su actualización y liberación."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-tmc-etr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
              "lessThan": "5d5d130835b417c7bfd6c942f0149e34397d4463",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
              "lessThan": "4e83434247ff8005a0b9a1ee997864abf8f259ec",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
              "lessThan": "70acbc9c77686b7a521af6d7a543dcd9c324cf07",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
              "lessThan": "cda077a19f5c8d6ec61e5b97deca203d95e3a422",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
              "lessThan": "35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fdd3ceb0001da6768bede9779a0190a42e65c404",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6.5.8",
              "lessThan": "6.6",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-tmc-etr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.6",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.6",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.13",
              "lessThanOrEqual": "6.17.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.2",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.19",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4e83434247ff8005a0b9a1ee997864abf8f259ec",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5d5d130835b417c7bfd6c942f0149e34397d4463",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}