CVE-2026-72037 (GCVE-0-2026-72037)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-17 05:07
VLAI
Title
net: lan743x: Initialize eth_syslock spinlock before use
Summary
In the Linux kernel, the following vulnerability has been resolved: net: lan743x: Initialize eth_syslock spinlock before use lan743x_hardware_init() calls pci11x1x_strap_get_status() during the PCI11x1x probe sequence. That helper acquires the Ethernet subsystem hardware lock via lan743x_hs_syslock_acquire(), which relies on adapter->eth_syslock_spinlock to serialize access. The spinlock is currently initialized only after the strap status is read. With CONFIG_DEBUG_SPINLOCK enabled, taking the zeroed initialized spinlock can trip the spinlock debug check. Fix by initializing adapter->eth_syslock_spinlock before reading the strap status so the probe path never attempts to lock an uninitialized spinlock.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 46b777ad9a8c269113634cee6a380bc4e53f3964 , < dfaefd9a7808736fcd2ed0de108f55c4badc15cc (git)
Affected: 46b777ad9a8c269113634cee6a380bc4e53f3964 , < 6523daa6852b1bfef32ec7a105b0217e8a115687 (git)
Affected: 46b777ad9a8c269113634cee6a380bc4e53f3964 , < b6a93a42e0e61f0ba0005a942ee3bffb16c0574e (git)
Affected: 46b777ad9a8c269113634cee6a380bc4e53f3964 , < 99a6f37b113c46815deb160c5012073563679ef4 (git)
Affected: 46b777ad9a8c269113634cee6a380bc4e53f3964 , < b99e890e6b32ffa11c145a16fefcf2c7137a9578 (git)
Affected: 46b777ad9a8c269113634cee6a380bc4e53f3964 , < 39139b1c1c2b614096519b526112c726adb12ff0 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 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\nnet: lan743x: Initialize eth_syslock spinlock before use\n\nlan743x_hardware_init() calls pci11x1x_strap_get_status() during the\nPCI11x1x probe sequence. That helper acquires the Ethernet subsystem\nhardware lock via lan743x_hs_syslock_acquire(), which relies on\nadapter-\u003eeth_syslock_spinlock to serialize access.\n\nThe spinlock is currently initialized only after the strap status is\nread. With CONFIG_DEBUG_SPINLOCK enabled, taking the zeroed initialized\nspinlock can trip the spinlock debug check.\n\nFix by initializing adapter-\u003eeth_syslock_spinlock before reading the\nstrap status so the probe path never attempts to lock an uninitialized\nspinlock."
        }
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        "dateUpdated": "2026-08-17T05:07:02.911Z",
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          "url": "https://git.kernel.org/stable/c/39139b1c1c2b614096519b526112c726adb12ff0"
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    "dateReserved": "2026-08-09T03:40:39.901Z",
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          }
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        "id": "CVE-2026-72037",
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        "metrics": {},
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      "cve": "CVE-2026-72037",
      "id": "CVE-2026-72037",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "76",
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      "title": "kernel: net: lan743x: Initialize eth_syslock spinlock before use",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72037.json",
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  }
}



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