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CVE-2026-23406

🗓️ 01 Apr 2026 08:36:36Reported by LinuxType 
cve
 cve🔗 web.nvd.nist.gov👁 33 Views

AppArmor fixes side-effect bug in match_char macro causing out-of-bounds reads in DFA matching.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-23406
1 Apr 202608:36
–attackerkb
CBLMariner		CVE-2026-23406 affecting package kernel for versions less than 6.6.130.1-1
30 Mar 202616:12
–cbl_mariner
Circl		CVE-2026-23406
1 Apr 202611:46
–circl
CNNVD		Linux kernel 安全漏洞
1 Apr 202600:00
–cnnvd
Cvelist		CVE-2026-23406 apparmor: fix side-effect bug in match_char() macro usage
1 Apr 202608:36
–cvelist
Debian CVE		CVE-2026-23406
1 Apr 202608:36
–debiancve
Tenable Nessus		EulerOS 2.0 SP11 : kernel (EulerOS-SA-2026-2209)
9 Jun 202600:00
–nessus
Tenable Nessus		EulerOS 2.0 SP11 : kernel (EulerOS-SA-2026-2247)
9 Jun 202600:00
–nessus
Tenable Nessus		EulerOS 2.0 SP13 : kernel (EulerOS-SA-2026-2293)
10 Jun 202600:00
–nessus
Tenable Nessus		EulerOS 2.0 SP13 : kernel (EulerOS-SA-2026-2336)
10 Jun 202600:00
–nessus
Rows per page
NVD
Vulners
CNA
Node
linuxlinux_kernelRange4.17.1–5.10.253
OR
linuxlinux_kernelRange5.11–5.15.203
OR
linuxlinux_kernelRange5.16–6.1.169
OR
linuxlinux_kernelRange6.2–6.6.130
OR
linuxlinux_kernelRange6.7–6.12.77
OR
linuxlinux_kernelRange6.13–6.18.18
OR
linuxlinux_kernelRange6.19–6.19.8
OR
linuxlinux_kernelMatch4.17-
OR
linuxlinux_kernelMatch7.0rc1
OR
linuxlinux_kernelMatch7.0rc2
OR
linuxlinux_kernelMatch7.0rc3
OR
linuxlinux_kernelMatch7.0rc4
OR
linuxlinux_kernelMatch7.0rc5
OR
linuxlinux_kernelMatch7.0rc6
OR
linuxlinux_kernelMatch7.0rc7
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "security/apparmor/match.c"
    ],
    "versions": [
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "c7dc56d8b37eda1396feeec3ab1c7ecee5eae31b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "f16f2e5936c0f5f0d11fdf10d2be3e47e7108e42",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "1fc94f16098213d01e56c97feed9b3ecf0147a37",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "5a184f7cbdeaad17e16dedf3c17d0cd622edfed8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "b73c1dff8a9d7eeaebabf8097a5b2de192f40913",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "0510d1ba0976f97f521feb2b75b0572ea5df3ceb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "383b7270faf42564f133134c2fc3c24bbae52615",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "074c1cd798cb0b481d7eaa749b64aa416563c053",
        "lessThan": "8756b68edae37ff546c02091989a4ceab3f20abd",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "security/apparmor/match.c"
    ],
    "versions": [
      {
        "version": "4.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.17",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.253",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.203",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.169",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.130",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.77",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.18",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.8",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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17 Jun 2026 10:21Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.8
EPSS0.00177
CWE-125
AppArmormatch_char bugout of boundsdfa matchingdifferential encoding
33