Vulnerability-Lookup

OESA-2026-1470 (CVE-2026-23085)

Vulnerability from osv_openeuler – Published: 2026-02-28 11:10 – Updated: 2026-08-06 11:10 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

A memory address truncation vulnerability exists in the irqchip/gic-v3-its driver of the Linux kernel. On 32-bit ARM machines with CONFIG_ARM_LPAE enabled, when using larger VMSPLIT configurations, lowmem allocations may be backed by physical memory addresses above the 32-bit address limit. The GICv3 driver allocates the 'itt' object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in ZONE_DMA in this configuration, kmalloc() defaults to higher addresses in ZONE_NORMAL. However, the driver stores these physical addresses in 32-bit 'unsigned long' variables, causing the high addresses to be truncated, which leads to system crashes.(CVE-2026-23085)

Severity

5.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23085	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bpftool-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "bpftool-debuginfo-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-debuginfo-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-debugsource-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-devel-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-headers-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-source-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-tools-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-tools-debuginfo-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "kernel-tools-devel-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "perf-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "perf-debuginfo-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "python3-perf-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm",
          "python3-perf-debuginfo-5.10.0-302.0.0.205.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "kernel-5.10.0-302.0.0.205.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "bpftool-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "bpftool-debuginfo-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-debuginfo-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-debugsource-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-devel-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-headers-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-source-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-tools-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-tools-debuginfo-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "kernel-tools-devel-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "perf-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "perf-debuginfo-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "python3-perf-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm",
          "python3-perf-debuginfo-5.10.0-302.0.0.205.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.0-302.0.0.205.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\n\nA memory address truncation vulnerability exists in the irqchip/gic-v3-its driver of the Linux kernel. On 32-bit ARM machines with CONFIG_ARM_LPAE enabled, when using larger VMSPLIT configurations, lowmem allocations may be backed by physical memory addresses above the 32-bit address limit. The GICv3 driver allocates the \u0026apos;itt\u0026apos; object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in ZONE_DMA in this configuration, kmalloc() defaults to higher addresses in ZONE_NORMAL. However, the driver stores these physical addresses in 32-bit \u0026apos;unsigned long\u0026apos; variables, causing the high addresses to be truncated, which leads to system crashes.(CVE-2026-23085)",
  "id": "OESA-2026-1470",
  "modified": "2026-08-06T11:10:29Z",
  "published": "2026-02-28T11:10:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1470"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23085"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2026-23085"
  ]
}

CVE-2026-23085 (GCVE-0-2026-23085)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-06-11 18:44

Title

irqchip/gic-v3-its: Avoid truncating memory addresses

Summary

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Avoid truncating memory addresses On 32-bit machines with CONFIG_ARM_LPAE, it is possible for lowmem allocations to be backed by addresses physical memory above the 32-bit address limit, as found while experimenting with larger VMSPLIT configurations. This caused the qemu virt model to crash in the GICv3 driver, which allocates the 'itt' object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in ZONE_DMA in this configuration, kmalloc() defaults to higher addresses for ZONE_NORMAL, and the ITS driver stores the physical address in a 32-bit 'unsigned long' variable. Change the itt_addr variable to the correct phys_addr_t type instead, along with all other variables in this driver that hold a physical address. The gicv5 driver correctly uses u64 variables, while all other irqchip drivers don't call virt_to_phys or similar interfaces. It's expected that other device drivers have similar issues, but fixing this one is sufficient for booting a virtio based guest.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-10 20:40 UTC

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/e332b3b69e5b3acf0…
https://git.kernel.org/stable/c/e2f9c751f73a2d5bb…
https://git.kernel.org/stable/c/85215d63398323380…
https://git.kernel.org/stable/c/1b323391560354d8c…
https://git.kernel.org/stable/c/084ba3b99f2dfd991…
https://git.kernel.org/stable/c/03faa61eb4b9ca9aa…
https://git.kernel.org/stable/c/8d76a7d89c12d0838…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e , < e332b3b69e5b3acf07204a4b185071bab15c2b88 (git) Affected: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e , < e2f9c751f73a2d5bb62d94ab030aec118a811f27 (git) Affected: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e , < 85215d633983233809f7d4dad163b953331b8238 (git) Affected: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e , < 1b323391560354d8c515de8658b057a1daa82adb (git) Affected: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e , < 084ba3b99f2dfd991ce7e84fb17117319ec3cd9f (git) Affected: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e , < 03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98 (git) Affected: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e , < 8d76a7d89c12d08382b66e2f21f20d0627d14859 (git)
Linux	Linux	Affected: 3.19 Unaffected: 0 , < 3.19 (semver) Unaffected: 5.10.249 , ≤ 5.10.* (semver) Unaffected: 5.15.199 , ≤ 5.15.* (semver) Unaffected: 6.1.162 , ≤ 6.1.* (semver) Unaffected: 6.6.122 , ≤ 6.6.* (semver) Unaffected: 6.12.68 , ≤ 6.12.* (semver) Unaffected: 6.18.8 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23085",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T20:40:42.445145Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-11T18:44:04.404Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/irqchip/irq-gic-v3-its.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e332b3b69e5b3acf07204a4b185071bab15c2b88",
              "status": "affected",
              "version": "cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e",
              "versionType": "git"
            },
            {
              "lessThan": "85215d633983233809f7d4dad163b953331b8238",
              "status": "affected",
              "version": "cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e",
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            },
            {
              "lessThan": "1b323391560354d8c515de8658b057a1daa82adb",
              "status": "affected",
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            {
              "lessThan": "084ba3b99f2dfd991ce7e84fb17117319ec3cd9f",
              "status": "affected",
              "version": "cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e",
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              "lessThan": "03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98",
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              "versionType": "git"
            },
            {
              "lessThan": "8d76a7d89c12d08382b66e2f21f20d0627d14859",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "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"
            },
            {
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              "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": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.199",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.162",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.122",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.68",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.19",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/gic-v3-its: Avoid truncating memory addresses\n\nOn 32-bit machines with CONFIG_ARM_LPAE, it is possible for lowmem\nallocations to be backed by addresses physical memory above the 32-bit\naddress limit, as found while experimenting with larger VMSPLIT\nconfigurations.\n\nThis caused the qemu virt model to crash in the GICv3 driver, which\nallocates the \u0027itt\u0027 object using GFP_KERNEL. Since all memory below\nthe 4GB physical address limit is in ZONE_DMA in this configuration,\nkmalloc() defaults to higher addresses for ZONE_NORMAL, and the\nITS driver stores the physical address in a 32-bit \u0027unsigned long\u0027\nvariable.\n\nChange the itt_addr variable to the correct phys_addr_t type instead,\nalong with all other variables in this driver that hold a physical\naddress.\n\nThe gicv5 driver correctly uses u64 variables, while all other irqchip\ndrivers don\u0027t call virt_to_phys or similar interfaces. It\u0027s expected that\nother device drivers have similar issues, but fixing this one is\nsufficient for booting a virtio based guest."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:59:42.618Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e332b3b69e5b3acf07204a4b185071bab15c2b88"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2f9c751f73a2d5bb62d94ab030aec118a811f27"
        },
        {
          "url": "https://git.kernel.org/stable/c/85215d633983233809f7d4dad163b953331b8238"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b323391560354d8c515de8658b057a1daa82adb"
        },
        {
          "url": "https://git.kernel.org/stable/c/084ba3b99f2dfd991ce7e84fb17117319ec3cd9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d76a7d89c12d08382b66e2f21f20d0627d14859"
        }
      ],
      "title": "irqchip/gic-v3-its: Avoid truncating memory addresses",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23085",
    "datePublished": "2026-02-04T16:08:09.368Z",
    "dateReserved": "2026-01-13T15:37:45.961Z",
    "dateUpdated": "2026-06-11T18:44:04.404Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Related by attack behaviour

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.