CVE-2026-23056 (GCVE-0-2026-23056)
Vulnerability from cvelistv5
Published
2026-02-04 16:07
Modified
2026-02-09 08:37
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: uacce: implement mremap in uacce_vm_ops to return -EPERM The current uacce_vm_ops does not support the mremap operation of vm_operations_struct. Implement .mremap to return -EPERM to remind users. The reason we need to explicitly disable mremap is that when the driver does not implement .mremap, it uses the default mremap method. This could lead to a risk scenario: An application might first mmap address p1, then mremap to p2, followed by munmap(p1), and finally munmap(p2). Since the default mremap copies the original vma's vm_private_data (i.e., q) to the new vma, both munmap operations would trigger vma_close, causing q->qfr to be freed twice(qfr will be set to null here, so repeated release is ok).
References
Impacted products
Vendor Product Version
Linux Linux Version: 015d239ac0142ad0e26567fd890ef8d171f13709
Version: 015d239ac0142ad0e26567fd890ef8d171f13709
Version: 015d239ac0142ad0e26567fd890ef8d171f13709
Version: 015d239ac0142ad0e26567fd890ef8d171f13709
Version: 015d239ac0142ad0e26567fd890ef8d171f13709
Version: 015d239ac0142ad0e26567fd890ef8d171f13709
Version: 015d239ac0142ad0e26567fd890ef8d171f13709
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/uacce/uacce.c"
          ],
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          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.249",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.249",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.199",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
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                {
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuacce: implement mremap in uacce_vm_ops to return -EPERM\n\nThe current uacce_vm_ops does not support the mremap operation of\nvm_operations_struct. Implement .mremap to return -EPERM to remind\nusers.\n\nThe reason we need to explicitly disable mremap is that when the\ndriver does not implement .mremap, it uses the default mremap\nmethod. This could lead to a risk scenario:\n\nAn application might first mmap address p1, then mremap to p2,\nfollowed by munmap(p1), and finally munmap(p2). Since the default\nmremap copies the original vma\u0027s vm_private_data (i.e., q) to the\nnew vma, both munmap operations would trigger vma_close, causing\nq-\u003eqfr to be freed twice(qfr will be set to null here, so repeated\nrelease is ok)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:37:54.328Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/78d99f062d42e3af2ca46bde1a8e46e0dfd372e3"
        },
        {
          "url": "https://git.kernel.org/stable/c/ebfa85658a39b49ec3901ceea7535b73aa0429e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/75b29bdc935ff93b8e8bf6f6b4d8a4810b26e06f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c042bc71474dbe417c268f4bfb8ec196f802f07"
        },
        {
          "url": "https://git.kernel.org/stable/c/a407ddd61b3e6afc5ccfcd1478797171cf5686ee"
        },
        {
          "url": "https://git.kernel.org/stable/c/ba29b59d124e725e0377f09b2044909c91d657a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/02695347be532b628f22488300d40c4eba48b9b7"
        }
      ],
      "title": "uacce: implement mremap in uacce_vm_ops to return -EPERM",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23056",
    "datePublished": "2026-02-04T16:07:34.787Z",
    "dateReserved": "2026-01-13T15:37:45.951Z",
    "dateUpdated": "2026-02-09T08:37:54.328Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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