CVE-2021-47011 mm: memcontrol: slab: fix obtain a reference to a freeing memcg

🗓️ 28 Feb 2024 08:13:29Reported by LinuxType

Fix Linux kernel vulnerability mm: memcontrol: sla

Reporter	Title	Published	Views	Family All 52
ATTACKERKB	CVE-2021-47011	28 Feb 202409:15	–	attackerkb
Tenable Nessus	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2022-002 (ALASKERNEL-5.10-2022-002)	2 May 202200:00	–	nessus
Tenable Nessus	RHEL 8 : kernel (RHSA-2021:4356)	11 Nov 202100:00	–	nessus
Tenable Nessus	RHEL 6 : kernel (Unpatched Vulnerability)	11 May 202400:00	–	nessus
Tenable Nessus	RHEL 7 : kernel (Unpatched Vulnerability)	11 May 202400:00	–	nessus
Tenable Nessus	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987124)	7 Oct 202500:00	–	nessus
Tenable Nessus	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989580)	5 Nov 202500:00	–	nessus
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2021-47011	5 Mar 202500:00	–	nessus
Amazon	Important: kernel	28 Jan 202200:00	–	amazon
BDU FSTEC	The vulnerability of the drain_obj_stock() function in the mm/memcontrol.c module of the Linux kernel’s memory management subsystem allows a hacker to gain access to protected information or cause service failures.	9 Jun 202500:00	–	bdu_fstec

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/memcontrol.c"
    ],
    "versions": [
      {
        "version": "26f54dac15640c65ec69867e182de7be708ea389",
        "lessThan": "31df8bc4d3feca9f9c6b2cd06fd64a111ae1a0e6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3de7d4f25a7438f09fef4e71ef111f1805cd8e7c",
        "lessThan": "89b1ed358e01e1b0417f5d3b0082359a23355552",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3de7d4f25a7438f09fef4e71ef111f1805cd8e7c",
        "lessThan": "c3ae6a3f3ca4f02f6ccddf213c027302586580d0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3de7d4f25a7438f09fef4e71ef111f1805cd8e7c",
        "lessThan": "9f38f03ae8d5f57371b71aa6b4275765b65454fd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.10.11",
        "lessThan": "5.10.37",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/memcontrol.c"
    ],
    "versions": [
      {
        "version": "5.11",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.11",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.37",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.11.21",
        "lessThanOrEqual": "5.11.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.12.4",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/89b1ed358e01e1b0417f5d3b0082359a23355552
git	www.git.kernel.org/stable/c/9f38f03ae8d5f57371b71aa6b4275765b65454fd
git	www.git.kernel.org/stable/c/31df8bc4d3feca9f9c6b2cd06fd64a111ae1a0e6
git	www.git.kernel.org/stable/c/c3ae6a3f3ca4f02f6ccddf213c027302586580d0

23 May 2026 15:19Current

8.6High risk

Vulners AI Score8.6

EPSS0.00239