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CVE-2026-63886

🗓️ 19 Jul 2026 14:54:59Reported by LinuxType 
cve
 cve
🔗 web.nvd.nist.gov👁 8 Views

Fix validates CHAP_R length before base64 decoding to prevent overflow in iSCSI CHAP handling.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
Cvelist
CVE-2026-63886 scsi: target: iscsi: Validate CHAP_R length before base64 decode
19 Jul 202614:54
cvelist
EUVD
EUVD-2026-45771
19 Jul 202614:54
euvd
NVD
CVE-2026-63886
19 Jul 202616:17
nvd
OSV
CVE-2026-63886 scsi: target: iscsi: Validate CHAP_R length before base64 decode
19 Jul 202614:54
osv
OSV
DEBIAN-CVE-2026-63886
19 Jul 202616:17
osv
Positive Technologies
PT-2026-61203
19 Jul 202600:00
ptsecurity
Vulners
CNA
Node
OR
linuxlinux_kernelRange6.06.1.176
linuxlinux_kernelRange6.2.06.6.143
linuxlinux_kernelRange6.7.06.12.93
linuxlinux_kernelRange6.13.06.18.35
linuxlinux_kernelRange6.19.07.0.12
linuxlinux_kernelRange7.1.0
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/target/iscsi/iscsi_target_auth.c"
    ],
    "versions": [
      {
        "version": "1e5733883421495908f3b90d9d807663038b4136",
        "lessThan": "82454e6f21e56ea9a0a9de7d0ff7e1dfb83e34d6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1e5733883421495908f3b90d9d807663038b4136",
        "lessThan": "edd06675a02376ea8347dba7c29ad982ba5b36ee",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1e5733883421495908f3b90d9d807663038b4136",
        "lessThan": "bf154c657828ed05399bca5d98cf1611bb048b12",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1e5733883421495908f3b90d9d807663038b4136",
        "lessThan": "4a3a19c98a8207ad08bec554703d90f2c34a8cc6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1e5733883421495908f3b90d9d807663038b4136",
        "lessThan": "c04e85799356120209b351a148ac2db888d5ffd9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1e5733883421495908f3b90d9d807663038b4136",
        "lessThan": "85db7391310b1304d2dc8ae3b0b12105a9567147",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/target/iscsi/iscsi_target_auth.c"
    ],
    "versions": [
      {
        "version": "6.0",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.0",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.176",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.143",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.93",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.35",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.12",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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19 Jul 2026 16:17Current
5.3Medium risk
Vulners AI Score5.3
8