Vulnerability-Lookup

OESA-2026-2753 (CVE-2026-46294)

Vulnerability from osv_openeuler – Published: 2026-06-24 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

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

dm: fix a buffer overflow in ioctl processing

Tony Asleson (using Claude) found a buffer overflow in dm-ioctl in the function retrieve_status:

The code in retrieve_status checks that the output string fits into the output buffer and writes the output string there
Then, the code aligns the "outptr" variable to the next 8-byte boundary: outptr = align_ptr(outptr);
The alignment doesn't check overflow, so outptr could point past the buffer end
The "for" loop is iterated again, it executes: remaining = len - (outptr - outbuf);
If "outptr" points past "outbuf + len", the arithmetics wraps around and the variable "remaining" contains unusually high number
With "remaining" being high, the code writes more data past the end of the buffer

Luckily, this bug has no security implications because: 1. Only root can issue device mapper ioctls 2. The commonly used libraries that communicate with device mapper (libdevmapper and devicemapper-rs) use buffer size that is aligned to 8 bytes - thus, "outptr = align_ptr(outptr)" can't overshoot the input buffer and the bug can't happen accidentally(CVE-2026-46294)

Severity

7.0 (High)


                    
                      CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-46294	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bpftool-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "bpftool-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-debugsource-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-devel-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-source-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-tools-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-tools-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "kernel-tools-devel-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "perf-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "python2-perf-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "python2-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "python3-perf-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
          "python3-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "kernel-4.19.90-2606.4.0.0377.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "bpftool-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "bpftool-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-debugsource-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-devel-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-source-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-tools-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-tools-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "kernel-tools-devel-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "perf-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "python2-perf-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "python2-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "python3-perf-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
          "python3-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.19.90-2606.4.0.0377.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix a buffer overflow in ioctl processing\n\nTony Asleson (using Claude) found a buffer overflow in dm-ioctl in the\nfunction retrieve_status:\n\n1. The code in retrieve_status checks that the output string fits into\n   the output buffer and writes the output string there\n2. Then, the code aligns the \u0026quot;outptr\u0026quot; variable to the next 8-byte\n   boundary:\n\toutptr = align_ptr(outptr);\n3. The alignment doesn\u0026apos;t check overflow, so outptr could point past the\n   buffer end\n4. The \u0026quot;for\u0026quot; loop is iterated again, it executes:\n\tremaining = len - (outptr - outbuf);\n5. If \u0026quot;outptr\u0026quot; points past \u0026quot;outbuf + len\u0026quot;, the arithmetics wraps around\n   and the variable \u0026quot;remaining\u0026quot; contains unusually high number\n6. With \u0026quot;remaining\u0026quot; being high, the code writes more data past the end of\n   the buffer\n\nLuckily, this bug has no security implications because:\n1. Only root can issue device mapper ioctls\n2. The commonly used libraries that communicate with device mapper\n   (libdevmapper and devicemapper-rs) use buffer size that is aligned to\n   8 bytes - thus, \u0026quot;outptr = align_ptr(outptr)\u0026quot; can\u0026apos;t overshoot the input\n   buffer and the bug can\u0026apos;t happen accidentally(CVE-2026-46294)",
  "id": "OESA-2026-2753",
  "modified": "2026-08-06T11:11:40Z",
  "published": "2026-06-24T11:11:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2753"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46294"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2026-46294"
  ]
}

CVE-2026-46294 (GCVE-0-2026-46294)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:46 – Updated: 2026-06-14 18:07

Title

dm: fix a buffer overflow in ioctl processing

Summary

In the Linux kernel, the following vulnerability has been resolved: dm: fix a buffer overflow in ioctl processing Tony Asleson (using Claude) found a buffer overflow in dm-ioctl in the function retrieve_status: 1. The code in retrieve_status checks that the output string fits into the output buffer and writes the output string there 2. Then, the code aligns the "outptr" variable to the next 8-byte boundary: outptr = align_ptr(outptr); 3. The alignment doesn't check overflow, so outptr could point past the buffer end 4. The "for" loop is iterated again, it executes: remaining = len - (outptr - outbuf); 5. If "outptr" points past "outbuf + len", the arithmetics wraps around and the variable "remaining" contains unusually high number 6. With "remaining" being high, the code writes more data past the end of the buffer Luckily, this bug has no security implications because: 1. Only root can issue device mapper ioctls 2. The commonly used libraries that communicate with device mapper (libdevmapper and devicemapper-rs) use buffer size that is aligned to 8 bytes - thus, "outptr = align_ptr(outptr)" can't overshoot the input buffer and the bug can't happen accidentally

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c8c5311237448f6ff…
https://git.kernel.org/stable/c/448ee8fb79c26a265…
https://git.kernel.org/stable/c/526ff9126a0ae087b…
https://git.kernel.org/stable/c/f0b0b09d9840838ae…
https://git.kernel.org/stable/c/d271631023cbe1cbe…
https://git.kernel.org/stable/c/5af6a879e915ae7bc…
https://git.kernel.org/stable/c/8daa6c708ef524089…
https://git.kernel.org/stable/c/2fa49cc884f6496a9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c8c5311237448f6ffeecc9aec2362e3692623668 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 448ee8fb79c26a26599ffa4b2adeb4322d3d3d8c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 526ff9126a0ae087b65726e1faf31114c718020d (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f0b0b09d9840838ae77ccdd6a62de0daef4e6e0a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d271631023cbe1cbe7c31a0275ab797883be6e0a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5af6a879e915ae7bcd83695c316ebb32e1c61bc2 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8daa6c708ef524089ae43f2aed9190acb26d7df8 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2fa49cc884f6496a915c35621ba4da35649bf159 (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c8c5311237448f6ffeecc9aec2362e3692623668",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "448ee8fb79c26a26599ffa4b2adeb4322d3d3d8c",
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              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
              "lessThan": "d271631023cbe1cbe7c31a0275ab797883be6e0a",
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              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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              "versionType": "git"
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          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix a buffer overflow in ioctl processing\n\nTony Asleson (using Claude) found a buffer overflow in dm-ioctl in the\nfunction retrieve_status:\n\n1. The code in retrieve_status checks that the output string fits into\n   the output buffer and writes the output string there\n2. Then, the code aligns the \"outptr\" variable to the next 8-byte\n   boundary:\n\toutptr = align_ptr(outptr);\n3. The alignment doesn\u0027t check overflow, so outptr could point past the\n   buffer end\n4. The \"for\" loop is iterated again, it executes:\n\tremaining = len - (outptr - outbuf);\n5. If \"outptr\" points past \"outbuf + len\", the arithmetics wraps around\n   and the variable \"remaining\" contains unusually high number\n6. With \"remaining\" being high, the code writes more data past the end of\n   the buffer\n\nLuckily, this bug has no security implications because:\n1. Only root can issue device mapper ioctls\n2. The commonly used libraries that communicate with device mapper\n   (libdevmapper and devicemapper-rs) use buffer size that is aligned to\n   8 bytes - thus, \"outptr = align_ptr(outptr)\" can\u0027t overshoot the input\n   buffer and the bug can\u0027t happen accidentally"
        }
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      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:07:06.194Z",
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        },
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          "url": "https://git.kernel.org/stable/c/2fa49cc884f6496a915c35621ba4da35649bf159"
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    "datePublished": "2026-06-08T15:46:21.401Z",
    "dateReserved": "2026-05-13T15:03:33.110Z",
    "dateUpdated": "2026-06-14T18:07:06.194Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2026-2753 (CVE-2026-46294)

CVE-2026-46294 (GCVE-0-2026-46294)

Tags

Sightings

Nomenclature

Related by attack behaviour