CVE-2026-68301 (GCVE-0-2026-68301)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:02 – Updated: 2026-08-19 16:32
VLAI
Title
net: hsr: fix memory leak on slave unregistration by removing synced VLANs
Summary
In the Linux kernel, the following vulnerability has been resolved: net: hsr: fix memory leak on slave unregistration by removing synced VLANs When an HSR master device is brought UP, it auto-adds VLAN 0 via vlan_vid0_add(), which propagates VID 0 to its slave devices (slave A and B). If a slave device is later unregistered while HSR is active (e.g., during netns cleanup or interface destruction), hsr_del_port() is called to detach the slave port from the HSR master. However, hsr_del_port() currently does not delete the VLAN IDs that were synced to the slave device by HSR. As a result, the slave device retains a refcount on VID 0 (and any other synced VLANs). When the slave device is destroyed, its vlan_info / vlan_vid_info structure remains allocated, leading to a memory leak. Fix this by calling vlan_vids_del_by_dev(port->dev, master->dev) in hsr_del_port() before unlinking slave A or slave B ports, matching the propagation logic in hsr_ndo_vlan_rx_add_vid() / hsr_ndo_vlan_rx_kill_vid() and the cleanup behavior in bonding and team drivers.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1100242709d5644856131a9dd25d32672ebe7357 , < ccc822e9e4f09a6c2ca73ad5334570441947f94f (git)
Affected: a2accc07bdcfb0c7ab2cacdca6a1fe8267816efa , < 79ff0547676acdeceda445c3fce4071b0a887b70 (git)
Affected: 72dbae1f2f2159395089405c6c54632f2613f1be , < f72c312af6c7897ab0f8a2b5a63f917a207a4143 (git)
Affected: c707d2c5541d2bb94131968ad5dfeb06427a1dba , < 21d48408479a17eb65568a765930adea37e4d804 (git)
Affected: 1a8a63a5305e95519de6f941922dfcd8179f82e5 , < b5ded444621b6180df9f3d4e07045fc1fc1e8cd9 (git)
Affected: 1a8a63a5305e95519de6f941922dfcd8179f82e5 , < ae995b8002d3af134560a706c0e111a89e26317c (git)
Affected: 1a8a63a5305e95519de6f941922dfcd8179f82e5 , < dcf15eaf5641812f1cfc5e96537380132a7da89d (git)
Affected: 5.15.194 , < 5.15.216 (semver)
Affected: 6.1.153 , < 6.1.183 (semver)
Affected: 6.6.107 , < 6.6.148 (semver)
Affected: 6.12.48 , < 6.12.101 (semver)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 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: hsr: fix memory leak on slave unregistration by removing synced VLANs\n\nWhen an HSR master device is brought UP, it auto-adds VLAN 0 via\nvlan_vid0_add(), which propagates VID 0 to its slave devices (slave A and B).\n\nIf a slave device is later unregistered while HSR is active (e.g., during\nnetns cleanup or interface destruction), hsr_del_port() is called to\ndetach the slave port from the HSR master. However, hsr_del_port() currently\ndoes not delete the VLAN IDs that were synced to the slave device by HSR.\n\nAs a result, the slave device retains a refcount on VID 0 (and any other\nsynced VLANs). When the slave device is destroyed, its vlan_info /\nvlan_vid_info structure remains allocated, leading to a memory leak.\n\nFix this by calling vlan_vids_del_by_dev(port-\u003edev, master-\u003edev) in\nhsr_del_port() before unlinking slave A or slave B ports, matching the\npropagation logic in hsr_ndo_vlan_rx_add_vid() / hsr_ndo_vlan_rx_kill_vid()\nand the cleanup behavior in bonding and team drivers."
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    "datePublished": "2026-08-10T12:02:35.155Z",
    "dateReserved": "2026-07-30T09:28:09.380Z",
    "dateUpdated": "2026-08-19T16:32:53.463Z",
    "state": "PUBLISHED"
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When the slave device is destroyed, its vlan_info /\\nvlan_vid_info structure remains allocated, leading to a memory leak.\\n\\nFix this by calling vlan_vids_del_by_dev(port-\u003edev, master-\u003edev) in\\nhsr_del_port() before unlinking slave A or slave B ports, matching the\\npropagation logic in hsr_ndo_vlan_rx_add_vid() / hsr_ndo_vlan_rx_kill_vid()\\nand the cleanup behavior in bonding and team drivers.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/hsr/hsr_slave.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1100242709d5644856131a9dd25d32672ebe7357\",\"lessThan\":\"ccc822e9e4f09a6c2ca73ad5334570441947f94f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a2accc07bdcfb0c7ab2cacdca6a1fe8267816efa\",\"lessThan\":\"79ff0547676acdeceda445c3fce4071b0a887b70\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"72dbae1f2f2159395089405c6c54632f2613f1be\",\"lessThan\":\"f72c312af6c7897ab0f8a2b5a63f917a207a4143\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c707d2c5541d2bb94131968ad5dfeb06427a1dba\",\"lessThan\":\"21d48408479a17eb65568a765930adea37e4d804\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1a8a63a5305e95519de6f941922dfcd8179f82e5\",\"lessThan\":\"b5ded444621b6180df9f3d4e07045fc1fc1e8cd9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1a8a63a5305e95519de6f941922dfcd8179f82e5\",\"lessThan\":\"ae995b8002d3af134560a706c0e111a89e26317c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1a8a63a5305e95519de6f941922dfcd8179f82e5\",\"lessThan\":\"dcf15eaf5641812f1cfc5e96537380132a7da89d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.15.194\",\"lessThan\":\"5.15.216\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.153\",\"lessThan\":\"6.1.183\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.107\",\"lessThan\":\"6.6.148\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.48\",\"lessThan\":\"6.12.101\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/hsr/hsr_slave.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/21d48408479a17eb65568a765930adea37e4d804\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/79ff0547676acdeceda445c3fce4071b0a887b70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae995b8002d3af134560a706c0e111a89e26317c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b5ded444621b6180df9f3d4e07045fc1fc1e8cd9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ccc822e9e4f09a6c2ca73ad5334570441947f94f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dcf15eaf5641812f1cfc5e96537380132a7da89d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f72c312af6c7897ab0f8a2b5a63f917a207a4143\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-11T15:33:37+00:00",
      "cve": "CVE-2026-68301",
      "id": "CVE-2026-68301",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: hsr: fix memory leak on slave unregistration by removing synced VLANs",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68301.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-14T23:44:52Z",
      "cve": "CVE-2026-68301",
      "id": "CVE-2026-68301",
      "initial_release_date": "2026-08-14T17:14:22Z",
      "product_status:known_not_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68301",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68301.json",
      "version": "3"
    }
  }
}



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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

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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.
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  • 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.