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net: stmmac: initialize ptp_lock at probe time

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: initialize ptp_lock at probe time priv->ptp_lock is only initialized in stmmac_ptp_register(), which runs during __stmmac_open(). However, the lock is also used while the interface is down and has never been opened: tc_taprio_configure() invokes the PTP gettime64() callback to compute the EST base time when offloading a TAPRIO schedule, and stmmac_get_time() takes priv->ptp_lock. Using an uninitialized rwlock is undefined behaviour. Move the rwlock_init() to __stmmac_dvr_probe(), together with the other private locks, so that ptp_lock is always valid regardless of the interface state.

Announced Source revision 1
Original source ↗

CVE-2026-97963

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-97963

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "b60189e0392fa06348911077ef281eb2b1047b6a",
        "lessThan": "ee33e424d4932c70f103b94a46b685923f236f65",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b60189e0392fa06348911077ef281eb2b1047b6a",
        "lessThan": "7ced87834f3a58761d4bbcabf8326478548e6a54",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b60189e0392fa06348911077ef281eb2b1047b6a",
        "lessThan": "79fb5bcc50996964e076dffbdc24b7d2c06bd957",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b60189e0392fa06348911077ef281eb2b1047b6a",
        "lessThan": "420315413b29635de1d4ea4142e410e6465260f3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b60189e0392fa06348911077ef281eb2b1047b6a",
        "lessThan": "25cc0096efba83b4e0e6fa50f03e9543b41e9d3d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b60189e0392fa06348911077ef281eb2b1047b6a",
        "lessThan": "b1986595cf827c38ff929e22fbc9ca8f76379306",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b60189e0392fa06348911077ef281eb2b1047b6a",
        "lessThan": "0338c68e22abd2ee509ec2e32508a50896618c32",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c",
      "drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.6"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.6",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c",
      "drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-97963

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38101 · Revision 1
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Publisher date
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