CVE-2021-47323 watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff()

🗓️ 21 May 2024 14:35:37Reported by LinuxType

CVE-2021-47323 fix for use-after-free vulnerability in sc520_wd

Reporter	Title	Published	Views	Family All 108
AstraLinux	Astra Linux – Vulnerability in Linux, Linux 5.10	3 May 202623:59	–	astralinux
BDU FSTEC	The vulnerability of the wdt_startup() function in the drivers/watchdog/sc520_wdt.c module exposes the security of Linux kernel watchdog timer support, allowing an attacker to compromise the confidentiality, integrity, and accessibility of the protected information.	23 Jun 202500:00	–	bdu_fstec
Circl	CVE-2021-47323	9 Apr 202513:47	–	circl
CNNVD	Linux kernel 安全漏洞	21 May 202400:00	–	cnnvd
CVE	CVE-2021-47323	21 May 202414:35	–	cve
Debian CVE	CVE-2021-47323	21 May 202414:35	–	debiancve
Microsoft CVE	watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff()	4 Sep 202504:17	–	mscve
NVD	CVE-2021-47323	21 May 202415:15	–	nvd
OpenVAS	openSUSE: Security Advisory for the Linux Kernel (SUSE-SU-2024:2185-1)	29 Jun 202400:00	–	openvas
OpenVAS	SUSE: Security Advisory (SUSE-SU-2024:1978-1)	12 Jun 202400:00	–	openvas

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/watchdog/sc520_wdt.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "0015581a79bbf8e521f85dddb7d3e4a66b9f51d4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "b4565a8a2d6bffb05bfbec11399d261ec16fe373",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "2aef07017fae21c3d8acea9656b10e3b9c0f1e04",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "522e75ed63f67e815d4ec0deace67df22d9ce78e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "7c56c5508dc20a6b133bc669fc34327a6711c24c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "a173e3b62cf6dd3c4a0a10c8a82eedfcae81a566",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "b3c41ea5bc34d8c7b19e230d80e0e555c6f5057d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "f0feab82f6a0323f54d85e8b512a2be64f83648a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "90b7c141132244e8e49a34a4c1e445cce33e07f4",
        "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/watchdog/sc520_wdt.c"
    ],
    "versions": [
      {
        "version": "2.6.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.12",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.4.276",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.9.276",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.14.240",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.19.198",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.4.134",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.52",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.12.19",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.13.4",
        "lessThanOrEqual": "5.13.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.14",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/a173e3b62cf6dd3c4a0a10c8a82eedfcae81a566
git	www.git.kernel.org/stable/c/7c56c5508dc20a6b133bc669fc34327a6711c24c
git	www.git.kernel.org/stable/c/90b7c141132244e8e49a34a4c1e445cce33e07f4
git	www.git.kernel.org/stable/c/b3c41ea5bc34d8c7b19e230d80e0e555c6f5057d
git	www.git.kernel.org/stable/c/b4565a8a2d6bffb05bfbec11399d261ec16fe373
git	www.git.kernel.org/stable/c/2aef07017fae21c3d8acea9656b10e3b9c0f1e04
git	www.git.kernel.org/stable/c/f0feab82f6a0323f54d85e8b512a2be64f83648a
git	www.git.kernel.org/stable/c/522e75ed63f67e815d4ec0deace67df22d9ce78e
git	www.git.kernel.org/stable/c/0015581a79bbf8e521f85dddb7d3e4a66b9f51d4

11 May 2026 13:52Current

6.4Medium risk

Vulners AI Score6.4

EPSS0.0116