CVE-2026-31786

🗓️ 30 Apr 2026 10:31:28Reported by LinuxType

Buffer overflow in Xen system hypervisor build id; fixed with memcpy (CVE-2026-31786).

Reporter	Title	Published	Views	Family All 94
ATTACKERKB	CVE-2026-31786	30 Apr 202610:31	–	attackerkb
Tenable Nessus	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-1694)	9 May 202600:00	–	nessus
Tenable Nessus	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2026-102 (ALASKERNEL-5.15-2026-102)	9 May 202600:00	–	nessus
Tenable Nessus	Debian dla-4561 : linux-config-6.1 - security update	2 May 202600:00	–	nessus
Tenable Nessus	Debian dla-4606 : ata-modules-5.10.0-43-armmp-di - security update	3 Jun 202600:00	–	nessus
Tenable Nessus	Debian dsa-6238 : ata-modules-6.12.74+deb13+1-armmp-di - security update	30 Apr 202600:00	–	nessus
Tenable Nessus	Debian dsa-6243 : affs-modules-6.1.0-44-4kc-malta-di - security update	2 May 202600:00	–	nessus
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-31786	29 Apr 202600:00	–	nessus
Chainguard	CVE-2026-31786 vulnerabilities	8 May 202607:18	–	cgr
Circl	CVE-2026-31786	28 Apr 202612:49	–	circl

NVD

Vulners

CNA

Node

linux linux_kernelRange4.13–5.10.254

linux linux_kernelRange5.11–5.15.204

linux linux_kernelRange5.16–6.1.170

linux linux_kernelRange6.2–6.6.137

linux linux_kernelRange6.7–6.12.85

linux linux_kernelRange6.13–6.18.26

linux linux_kernelRange6.19–7.0.3

linux linux_kernelMatch7.1rc1

linux linux_kernelMatch7.1rc2

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/xen/sys-hypervisor.c"
    ],
    "versions": [
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "e3af585e1728c917682b6a3de9a69b41fb9194d4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "8288d031a01dbacfde3fc643f7be3d23504de64d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "f458ba102da97fafca106327086fc95f3fc764cb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "4b4defd2fce3f966c25adabf46644a85558f1169",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "5c5ff7c7bd15bb536f44b10b3fb5b8408f344d0a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "d5f59216650c51e5e3fcb7517c825bc8047f60ef",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "52cecff98bda2c51eed1c6ce9d21c5d6268fb19d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "84b7625728ea311ea35bdaa0eded53c1c56baeaa",
        "lessThan": "27fdbab4221b375de54bf91919798d88520c6e28",
        "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/xen/sys-hypervisor.c"
    ],
    "versions": [
      {
        "version": "4.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.254",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.204",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.170",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.137",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.85",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.26",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.3",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1-rc2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/8288d031a01dbacfde3fc643f7be3d23504de64d
git	www.git.kernel.org/stable/c/4b4defd2fce3f966c25adabf46644a85558f1169
git	www.git.kernel.org/stable/c/d5f59216650c51e5e3fcb7517c825bc8047f60ef
git	www.git.kernel.org/stable/c/52cecff98bda2c51eed1c6ce9d21c5d6268fb19d
git	www.git.kernel.org/stable/c/f458ba102da97fafca106327086fc95f3fc764cb
git	www.git.kernel.org/stable/c/e3af585e1728c917682b6a3de9a69b41fb9194d4
git	www.git.kernel.org/stable/c/27fdbab4221b375de54bf91919798d88520c6e28
git	www.git.kernel.org/stable/c/5c5ff7c7bd15bb536f44b10b3fb5b8408f344d0a
openwall	www.openwall.com/lists/oss-security/2026/04/28/12
xenbits	www.xenbits.xen.org/xsa/advisory-485.html

11 May 2026 22:15Current

5.8Medium risk

Vulners AI Score5.8

CVSS 3.17.8

EPSS0.00006

CWE-787