CVE-2026-63887

🗓️ 19 Jul 2026 14:55:00Reported by LinuxType

Fixed kernel iscsi login buffer overflow in iscsi_encode_text_output when encoding key=value records.

Reporter	Title	Published	Views	Family All 25
Cvelist	CVE-2026-63887 scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf	19 Jul 202614:55	–	cvelist
Debian CVE	CVE-2026-63887	19 Jul 202614:55	–	debiancve
EUVD	EUVD-2026-45660	19 Jul 202614:55	–	euvd
NVD	CVE-2026-63887	19 Jul 202616:17	–	nvd
OSV	BELL-CVE-2026-63887	22 Jul 202606:04	–	osv
OSV	DEBIAN-CVE-2026-63887	19 Jul 202616:17	–	osv
OSV	OESA-2026-3302 kernel security update	7 Aug 202602:45	–	osv
OSV	OESA-2026-3303 kernel security update	7 Aug 202602:45	–	osv
OSV	ROOT-OS-UBUNTU-2204-CVE-2026-63887 CVE-2026-63887 in linux - Patched by Root	6 Aug 202607:51	–	osv
OSV	UBUNTU-CVE-2026-63887	20 Jul 202600:00	–	osv

Vulners

CNA

Node

linux linux_kernelRange3.1–5.10.259

linux linux_kernelRange5.11.0–5.15.210

linux linux_kernelRange5.16.0–6.1.176

linux linux_kernelRange6.2.0–6.6.143

linux linux_kernelRange6.7.0–6.12.93

linux linux_kernelRange6.13.0–6.18.35

linux linux_kernelRange6.19.0–7.0.12

linux linux_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_nego.c",
      "drivers/target/iscsi/iscsi_target_parameters.c",
      "drivers/target/iscsi/iscsi_target_parameters.h"
    ],
    "versions": [
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "cb84e974fb172bc71386289f37b78ea679410b39",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "b19382dfc6e7dee6d3859ba44b6ca29e97a51627",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "efe633e600a0ac68357206fede21b1ac8178f3b8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "4e9f0c4a645c995bc75c06c7b3644254ffb4c76b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "30bf335e8fe170322080ee001f05ca29c50680b3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "594a40360012ce5f94c715d5e3b20fa3af7d525a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "26e4a304b7e6f1338c675d527608d32549c091db",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e48354ce078c079996f89d715dfa44814b4eba01",
        "lessThan": "bf33e01f88388c43e285492a63e539df6ffed64c",
        "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_nego.c",
      "drivers/target/iscsi/iscsi_target_parameters.c",
      "drivers/target/iscsi/iscsi_target_parameters.h"
    ],
    "versions": [
      {
        "version": "3.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.1",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.259",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.210",
        "lessThanOrEqual": "5.15.*",
        "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"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/26e4a304b7e6f1338c675d527608d32549c091db
git	www.git.kernel.org/stable/c/bf33e01f88388c43e285492a63e539df6ffed64c
git	www.git.kernel.org/stable/c/594a40360012ce5f94c715d5e3b20fa3af7d525a
git	www.git.kernel.org/stable/c/4e9f0c4a645c995bc75c06c7b3644254ffb4c76b
git	www.git.kernel.org/stable/c/efe633e600a0ac68357206fede21b1ac8178f3b8
git	www.git.kernel.org/stable/c/cb84e974fb172bc71386289f37b78ea679410b39
git	www.git.kernel.org/stable/c/30bf335e8fe170322080ee001f05ca29c50680b3
git	www.git.kernel.org/stable/c/b19382dfc6e7dee6d3859ba44b6ca29e97a51627

05 Aug 2026 12:36Current

5.6Medium risk

Vulners AI Score5.6

CVSS 3.19.8

EPSS0.00745