CVE-2021-47656

🗓️ 26 Feb 2025 01:54:20Reported by LinuxType

Vulnerability CVE-2021-47656 fixed use-after-free in jffs2_clear_xattr_subsystem in Linux kernel.

Reporter	Title	Published	Views	Family All 33
AstraLinux	Astra Linux – Vulnerability in Linux 5.10, Linux	5 Oct 202611:39	–	astralinux
BDU FSTEC	jffs2 Heap Buffer Overflow DoS	14 Apr 202500:00	–	bdu_fstec
CNNVD	Linux Kernel Security Vulnerabilities	26 Feb 202500:00	–	cnnvd
Cvelist	CVE-2021-47656 jffs2: fix use-after-free in jffs2_clear_xattr_subsystem	26 Feb 202501:54	–	cvelist
Debian CVE	CVE-2021-47656	26 Feb 202501:54	–	debiancve
EUVD	EUVD-2021-34649	3 Oct 202520:07	–	euvd
NVD	CVE-2021-47656	26 Feb 202506:37	–	nvd
OpenVAS	SUSE: Security Advisory (SUSE-SU-2025:1027-1)	28 Mar 202500:00	–	openvas
OpenVAS	SUSE: Security Advisory (SUSE-SU-2025:1241-1)	16 Apr 202500:00	–	openvas
osv_debian	DEBIAN-CVE-2021-47656	26 Feb 202506:37	–	osv_debian

NVD

Vulners

CNA

Node

linux linux_kernelRange2.6.18–4.9.311

linux linux_kernelRange4.10–4.14.276

linux linux_kernelRange4.15–4.19.238

linux linux_kernelRange4.20–5.4.189

linux linux_kernelRange5.5–5.10.110

linux linux_kernelRange5.11–5.15.33

linux linux_kernelRange5.16–5.16.19

linux linux_kernelRange5.17–5.17.2

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/jffs2/fs.c"
    ],
    "versions": [
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "9150cb625b46f68d524f4cfd491f1aafc23e10a9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "3bd2454162ec6bbb5503233c804fce6e4b6dcec5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "c3b07c875fa8f906f932976460fd14798596f101",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "30bf7244acf32f19cb722c39f7bc1c2a9f300422",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "7bb7428dd73991bf4b3a7a61b493ca50046c2b13",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "7a75740206af5f17e9f3efa384211cba70213da1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "22327bd7988f21de3a53c1373f3b81542bfe1f44",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "8c0f024f29e055840a5a89fe23b96ae3f921afed",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa98d7cf59b5b0764d3502662053489585faf2fe",
        "lessThan": "4c7c44ee1650677fbe89d86edbad9497b7679b5c",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/jffs2/fs.c"
    ],
    "versions": [
      {
        "version": "2.6.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.18",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.9.311",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.14.276",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.19.238",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.4.189",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.110",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.33",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.16.19",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.17.2",
        "lessThanOrEqual": "5.17.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.18",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/c3b07c875fa8f906f932976460fd14798596f101
git	www.git.kernel.org/stable/c/8c0f024f29e055840a5a89fe23b96ae3f921afed
git	www.git.kernel.org/stable/c/30bf7244acf32f19cb722c39f7bc1c2a9f300422
git	www.git.kernel.org/stable/c/4c7c44ee1650677fbe89d86edbad9497b7679b5c
git	www.git.kernel.org/stable/c/3bd2454162ec6bbb5503233c804fce6e4b6dcec5
git	www.git.kernel.org/stable/c/7a75740206af5f17e9f3efa384211cba70213da1
git	www.git.kernel.org/stable/c/7bb7428dd73991bf4b3a7a61b493ca50046c2b13
git	www.git.kernel.org/stable/c/9150cb625b46f68d524f4cfd491f1aafc23e10a9
git	www.git.kernel.org/stable/c/22327bd7988f21de3a53c1373f3b81542bfe1f44

05 Aug 2026 08:48Current

7.5High risk

Vulners AI Score7.5

CVSS 3.17.8

EPSS0.00258

SSVC

CWE-416