Vulnerability-Lookup

GHSA-P95P-H38V-XC33

Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: team: stop reusing skb after queue override

A nonzero dev_queue_xmit() result does not return ownership of the skb. When an override port's qdisc drops it, the queue override helper used to try another port or the mode transmit op with the freed skb.

Return the handoff decision separately from transmit success. Select only the first override port under RCU and stop after handing it the skb, regardless of the lower transmit result. Keep the existing success and drop accounting.

BUG: KASAN: slab-use-after-free in sk_skb_reason_drop Write of size 4 by task poc/5040 sk_skb_reason_drop (net/core/skbuff.c:1240) dev_kfree_skb_any_reason (net/core/dev.c:3470) ab_transmit (drivers/net/team/team_mode_activebackup.c:49) team_xmit (drivers/net/team/team_core.c:1849) __dev_direct_xmit (net/core/dev.c:4934) Freed by task 5040: __tcf_kfree_skb_list (net/sched/sch_generic.c:43) __dev_queue_xmit (net/core/dev.c:4831) team_xmit (drivers/net/team/team_core.c:1846) Kernel panic - not syncing: KASAN: panic_on_warn set ...

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-99027"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T13:17:25Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: team: stop reusing skb after queue override\n\nA nonzero dev_queue_xmit() result does not return ownership of the skb.\nWhen an override port\u0027s qdisc drops it, the queue override helper used to\ntry another port or the mode transmit op with the freed skb.\n\nReturn the handoff decision separately from transmit success. Select only\nthe first override port under RCU and stop after handing it the skb,\nregardless of the lower transmit result. Keep the existing success and\ndrop accounting.\n\n  BUG: KASAN: slab-use-after-free in sk_skb_reason_drop\n  Write of size 4 by task poc/5040\n  sk_skb_reason_drop (net/core/skbuff.c:1240)\n  dev_kfree_skb_any_reason (net/core/dev.c:3470)\n  ab_transmit (drivers/net/team/team_mode_activebackup.c:49)\n  team_xmit (drivers/net/team/team_core.c:1849)\n  __dev_direct_xmit (net/core/dev.c:4934)\n  Freed by task 5040:\n  __tcf_kfree_skb_list (net/sched/sch_generic.c:43)\n  __dev_queue_xmit (net/core/dev.c:4831)\n  team_xmit (drivers/net/team/team_core.c:1846)\n  Kernel panic - not syncing: KASAN: panic_on_warn set ...",
  "id": "GHSA-p95p-h38v-xc33",
  "modified": "2026-10-23T15:31:35Z",
  "published": "2026-10-23T15:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99027"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-99027 (GCVE-0-2026-99027)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:21 – Updated: 2026-10-23 12:21

Title

net: team: stop reusing skb after queue override

Summary

In the Linux kernel, the following vulnerability has been resolved: net: team: stop reusing skb after queue override A nonzero dev_queue_xmit() result does not return ownership of the skb. When an override port's qdisc drops it, the queue override helper used to try another port or the mode transmit op with the freed skb. Return the handoff decision separately from transmit success. Select only the first override port under RCU and stop after handing it the skb, regardless of the lower transmit result. Keep the existing success and drop accounting. BUG: KASAN: slab-use-after-free in sk_skb_reason_drop Write of size 4 by task poc/5040 sk_skb_reason_drop (net/core/skbuff.c:1240) dev_kfree_skb_any_reason (net/core/dev.c:3470) ab_transmit (drivers/net/team/team_mode_activebackup.c:49) team_xmit (drivers/net/team/team_core.c:1849) __dev_direct_xmit (net/core/dev.c:4934) Freed by task 5040: __tcf_kfree_skb_list (net/sched/sch_generic.c:43) __dev_queue_xmit (net/core/dev.c:4831) team_xmit (drivers/net/team/team_core.c:1846) Kernel panic - not syncing: KASAN: panic_on_warn set ...

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/b21f20320fa2f3c68…
https://git.kernel.org/stable/c/07a48cfceb3d05557…
https://git.kernel.org/stable/c/0c0568c9d35c47dc8…
https://git.kernel.org/stable/c/bed63353341d2d44c…
https://git.kernel.org/stable/c/b7454f1940c5e6d92…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8ff5105a2b9dd0ba596719b165c1827d101e5f1a , < b21f20320fa2f3c683e3334d70de6bfd172e544a (git) Affected: 8ff5105a2b9dd0ba596719b165c1827d101e5f1a , < 07a48cfceb3d0555710a9acb87c949500a7b4523 (git) Affected: 8ff5105a2b9dd0ba596719b165c1827d101e5f1a , < 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e (git) Affected: 8ff5105a2b9dd0ba596719b165c1827d101e5f1a , < bed63353341d2d44cbad034001dd382cfe3a3892 (git) Affected: 8ff5105a2b9dd0ba596719b165c1827d101e5f1a , < b7454f1940c5e6d92e753853c476a769e452f30a (git)
Linux	Linux	Affected: 3.7 Unaffected: 0 , < 3.7 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.114 , ≤ 6.12.* (semver) Unaffected: 6.18.57 , ≤ 6.18.* (semver) Unaffected: 7.2.11 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/team/team_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b21f20320fa2f3c683e3334d70de6bfd172e544a",
              "status": "affected",
              "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
              "versionType": "git"
            },
            {
              "lessThan": "07a48cfceb3d0555710a9acb87c949500a7b4523",
              "status": "affected",
              "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
              "versionType": "git"
            },
            {
              "lessThan": "0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e",
              "status": "affected",
              "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
              "versionType": "git"
            },
            {
              "lessThan": "bed63353341d2d44cbad034001dd382cfe3a3892",
              "status": "affected",
              "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
              "versionType": "git"
            },
            {
              "lessThan": "b7454f1940c5e6d92e753853c476a769e452f30a",
              "status": "affected",
              "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/team/team_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.7"
            },
            {
              "lessThan": "3.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.114",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.57",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.11",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "3.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: team: stop reusing skb after queue override\n\nA nonzero dev_queue_xmit() result does not return ownership of the skb.\nWhen an override port\u0027s qdisc drops it, the queue override helper used to\ntry another port or the mode transmit op with the freed skb.\n\nReturn the handoff decision separately from transmit success. Select only\nthe first override port under RCU and stop after handing it the skb,\nregardless of the lower transmit result. Keep the existing success and\ndrop accounting.\n\n  BUG: KASAN: slab-use-after-free in sk_skb_reason_drop\n  Write of size 4 by task poc/5040\n  sk_skb_reason_drop (net/core/skbuff.c:1240)\n  dev_kfree_skb_any_reason (net/core/dev.c:3470)\n  ab_transmit (drivers/net/team/team_mode_activebackup.c:49)\n  team_xmit (drivers/net/team/team_core.c:1849)\n  __dev_direct_xmit (net/core/dev.c:4934)\n  Freed by task 5040:\n  __tcf_kfree_skb_list (net/sched/sch_generic.c:43)\n  __dev_queue_xmit (net/core/dev.c:4831)\n  team_xmit (drivers/net/team/team_core.c:1846)\n  Kernel panic - not syncing: KASAN: panic_on_warn set ..."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T12:21:14.896Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a"
        },
        {
          "url": "https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e"
        },
        {
          "url": "https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892"
        },
        {
          "url": "https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a"
        }
      ],
      "title": "net: team: stop reusing skb after queue override",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99027",
    "datePublished": "2026-10-23T12:21:14.896Z",
    "dateReserved": "2026-09-25T10:25:14.386Z",
    "dateUpdated": "2026-10-23T12:21:14.896Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.

Action not permitted