CVE-2026-64429 (GCVE-0-2026-64429)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
Title
gpio: eic-sprd: use raw_spinlock_t in the irq startup path
Summary
In the Linux kernel, the following vulnerability has been resolved: gpio: eic-sprd: use raw_spinlock_t in the irq startup path sprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller state through sprd_eic_update(), which takes sprd_eic->lock with spin_lock_irqsave(). The callback can be reached from irq_startup() while setting up a requested IRQ. That path is not sleepable, but on PREEMPT_RT a regular spinlock_t becomes a sleeping lock. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the request_threaded_irq() -> __setup_irq() -> irq_startup() -> sprd_eic_irq_unmask() -> sprd_eic_update() carrier and used the original spin_lock_irqsave(&sprd_eic->lock) edge. Lockdep BUG: sleeping function called from invalid context hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv] sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv] sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv] sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv] __setup_irq.constprop.0+0xd/0x30 [vuln_msv] Convert the Spreadtrum EIC controller lock to raw_spinlock_t. The locked section only serializes MMIO register updates and does not contain sleepable operations, so keeping it non-sleeping is appropriate for the irqchip callbacks.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 96612bf2712cd961dbd9b52f3a9b4ab668f57628 (git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 581ac2ad001ff1128931191f249a7f2074672b7a (git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < e244cd8b51001ba480f274c44dba9002813a4739 (git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 19d63fd528719ce7d06d9aeb88d25b7d6478198a (git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 6112fba4150039ccd90e29f2d1b788c73ad7b3dd (git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 4750909a40da9016185e0ac991510a278cecb1e7 (git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e (git)
Affected: 25518e024e3a6e5715d672f1daa91e1d100f7436 , < 90f0109019e6817eb40a486671b7722d1544ae29 (git)
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Linux Linux Affected: 4.17
Unaffected: 0 , < 4.17 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: eic-sprd: use raw_spinlock_t in the irq startup path\n\nsprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller\nstate through sprd_eic_update(), which takes sprd_eic-\u003elock with\nspin_lock_irqsave().  The callback can be reached from irq_startup()\nwhile setting up a requested IRQ.  That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -\u003e __setup_irq() -\u003e\nirq_startup() -\u003e sprd_eic_irq_unmask() -\u003e sprd_eic_update() carrier and\nused the original spin_lock_irqsave(\u0026sprd_eic-\u003elock) edge.  Lockdep\n\n  BUG: sleeping function called from invalid context\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n  sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n  sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv]\n  sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv]\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the Spreadtrum EIC controller lock to raw_spinlock_t.  The\nlocked section only serializes MMIO register updates and does not contain\nsleepable operations, so keeping it non-sleeping is appropriate for the\nirqchip callbacks."
          }
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        "id": "CVE-2026-64429",
        "lastModified": "2026-09-03T18:32:57.547",
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              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-07-25T10:17:27.070",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/19d63fd528719ce7d06d9aeb88d25b7d6478198a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4750909a40da9016185e0ac991510a278cecb1e7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/581ac2ad001ff1128931191f249a7f2074672b7a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6112fba4150039ccd90e29f2d1b788c73ad7b3dd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/90f0109019e6817eb40a486671b7722d1544ae29"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/96612bf2712cd961dbd9b52f3a9b4ab668f57628"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e244cd8b51001ba480f274c44dba9002813a4739"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-667"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-29T16:02:59+00:00",
      "cve": "CVE-2026-64429",
      "id": "CVE-2026-64429",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: gpio: eic-sprd: use raw_spinlock_t in the irq startup path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64429.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:40:17Z",
      "cve": "CVE-2026-64429",
      "id": "CVE-2026-64429",
      "initial_release_date": "2026-07-25T15:59:30Z",
      "product_status:known_affected": "578",
      "product_status:known_not_affected": "155",
      "product_status:recommended": "111",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64429",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64429.json",
      "version": "9"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.