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CVE-2026-43121

🗓️ 06 May 2026 11:27:08Reported by LinuxType 
cve
 cve
🔗 web.nvd.nist.gov📰️ 5 Media mentions👁 25 Views

Fix user_ref race in io_uring zcrx between scrub and refill by using atomic cmpxchg to prevent double-free.

Related
Detection
Affected
Refs
Social
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-43121
6 May 202611:27
attackerkb
Tenable Nessus
Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1702)
20 May 202600:00
nessus
Tenable Nessus
Linux Distros Unpatched Vulnerability : CVE-2026-43121
7 May 202600:00
nessus
Amazon
Important: kernel6.18
14 May 202600:00
amazon
AstraLinux
Astra Linux - уязвимость в linux-5.10
20 May 202605:53
astralinux
CNNVD
Linux kernel 安全漏洞
6 May 202600:00
cnnvd
Cvelist
CVE-2026-43121 io_uring/zcrx: fix user_ref race between scrub and refill paths
6 May 202611:27
cvelist
Debian CVE
CVE-2026-43121
6 May 202611:27
debiancve
EUVD
EUVD-2026-27682
6 May 202612:30
euvd
NVD
CVE-2026-43121
6 May 202612:16
nvd
Rows per page
NVD
Vulners
CNA
Node
linuxlinux_kernelRange6.156.18.16
OR
linuxlinux_kernelRange6.196.19.6
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "io_uring/zcrx.c"
    ],
    "versions": [
      {
        "version": "34a3e60821ab9f335a58d43a88cccdbefdebdec3",
        "lessThan": "a94f096e28bfc7975163a6b80f1c8f323efe317a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "34a3e60821ab9f335a58d43a88cccdbefdebdec3",
        "lessThan": "485dc691257b96e6d3bdc25b0eff2daadcc5c46c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "34a3e60821ab9f335a58d43a88cccdbefdebdec3",
        "lessThan": "003049b1c4fb8aabb93febb7d1e49004f6ad653b",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "io_uring/zcrx.c"
    ],
    "versions": [
      {
        "version": "6.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.15",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.16",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.6",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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17 Jun 2026 10:48Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.7
EPSS0.00088
25