Vulnerability-Lookup

GHSA-QCX9-4FJ7-JF29

Vulnerability from github – Published: 2026-04-01 09:31 – Updated: 2026-04-18 09:30

Details

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

apparmor: Fix double free of ns_name in aa_replace_profiles()

if ns_name is NULL after 1071 error = aa_unpack(udata, &lh, &ns_name);

and if ent->ns_name contains an ns_name in 1089 } else if (ent->ns_name) {

then ns_name is assigned the ent->ns_name 1095 ns_name = ent->ns_name;

however ent->ns_name is freed at 1262 aa_load_ent_free(ent);

and then again when freeing ns_name at 1270 kfree(ns_name);

Fix this by NULLing out ent->ns_name after it is transferred to ns_name

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23408"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-01T09:16:16Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix double free of ns_name in aa_replace_profiles()\n\nif ns_name is NULL after\n1071         error = aa_unpack(udata, \u0026lh, \u0026ns_name);\n\nand if ent-\u003ens_name contains an ns_name in\n1089                 } else if (ent-\u003ens_name) {\n\nthen ns_name is assigned the ent-\u003ens_name\n1095                         ns_name = ent-\u003ens_name;\n\nhowever ent-\u003ens_name is freed at\n1262                 aa_load_ent_free(ent);\n\nand then again when freeing ns_name at\n1270         kfree(ns_name);\n\nFix this by NULLing out ent-\u003ens_name after it is transferred to ns_name\n\n\")",
  "id": "GHSA-qcx9-4fj7-jf29",
  "modified": "2026-04-18T09:30:19Z",
  "published": "2026-04-01T09:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23408"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/18b5233e860c294a847ee07869d93c0b8673a54b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35f4caec1352054b9a61cfdf2bf1898073637aa0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5df0c44e8f5f619d3beb871207aded7c78414502"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7998ab3010d2317643f91828f1853d954ef31387"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86feeccd6b93ed94bd6655f30de80f163f8d5a45"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c053ae381ce227577567d1ef10090ce7506d7a28"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6347a2116ecccb8fd9ee4ebc75ae41d1d7ef689"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-23408 (GCVE-0-2026-23408)

Vulnerability from cvelistv5 – Published: 2026-04-01 08:36 – Updated: 2026-08-05 12:21

Title

apparmor: Fix double free of ns_name in aa_replace_profiles()

Summary

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of ns_name in aa_replace_profiles() if ns_name is NULL after 1071 error = aa_unpack(udata, &lh, &ns_name); and if ent->ns_name contains an ns_name in 1089 } else if (ent->ns_name) { then ns_name is assigned the ent->ns_name 1095 ns_name = ent->ns_name; however ent->ns_name is freed at 1262 aa_load_ent_free(ent); and then again when freeing ns_name at 1270 kfree(ns_name); Fix this by NULLing out ent->ns_name after it is transferred to ns_name ")

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c6347a2116ecccb8f…
https://git.kernel.org/stable/c/c053ae381ce227577…
https://git.kernel.org/stable/c/35f4caec1352054b9…
https://git.kernel.org/stable/c/55ef2af7490aaf72f…
https://git.kernel.org/stable/c/86feeccd6b93ed94b…
https://git.kernel.org/stable/c/7998ab3010d231764…
https://git.kernel.org/stable/c/18b5233e860c294a8…
https://git.kernel.org/stable/c/5df0c44e8f5f619d3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < c6347a2116ecccb8fd9ee4ebc75ae41d1d7ef689 (git) Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < c053ae381ce227577567d1ef10090ce7506d7a28 (git) Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < 35f4caec1352054b9a61cfdf2bf1898073637aa0 (git) Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < 55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162a (git) Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < 86feeccd6b93ed94bd6655f30de80f163f8d5a45 (git) Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < 7998ab3010d2317643f91828f1853d954ef31387 (git) Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < 18b5233e860c294a847ee07869d93c0b8673a54b (git) Affected: 145a0ef21c8e944957f58e2c8ffcd8a10f46266a , < 5df0c44e8f5f619d3beb871207aded7c78414502 (git)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.169 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.77 , ≤ 6.12.* (semver) Unaffected: 6.18.18 , ≤ 6.18.* (semver) Unaffected: 6.19.8 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/policy.c"
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              "status": "affected",
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            {
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              "versionType": "git"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
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              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix double free of ns_name in aa_replace_profiles()\n\nif ns_name is NULL after\n1071         error = aa_unpack(udata, \u0026lh, \u0026ns_name);\n\nand if ent-\u003ens_name contains an ns_name in\n1089                 } else if (ent-\u003ens_name) {\n\nthen ns_name is assigned the ent-\u003ens_name\n1095                         ns_name = ent-\u003ens_name;\n\nhowever ent-\u003ens_name is freed at\n1262                 aa_load_ent_free(ent);\n\nand then again when freeing ns_name at\n1270         kfree(ns_name);\n\nFix this by NULLing out ent-\u003ens_name after it is transferred to ns_name\n\n\")"
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        "dateUpdated": "2026-08-05T12:21:29.316Z",
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    "datePublished": "2026-04-01T08:36:37.873Z",
    "dateReserved": "2026-01-13T15:37:46.013Z",
    "dateUpdated": "2026-08-05T12:21:29.316Z",
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}

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.

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.