CVE-2026-63800

🗓️ 19 Jul 2026 12:02:06Reported by LinuxType

Linux kernel: fix use-after-free in pnfs_update_layout by tracing before freeing layout header.

Reporter	Title	Published	Views	Family All 11
ATTACKERKB	CVE-2026-63800	19 Jul 202612:02	–	attackerkb
Cvelist	CVE-2026-63800 pNFS: Fix use-after-free in pnfs_update_layout()	19 Jul 202612:02	–	cvelist
EUVD	EUVD-2026-45466	19 Jul 202612:02	–	euvd
NVD	CVE-2026-63800	19 Jul 202612:16	–	nvd
OSV	CVE-2026-63800 pNFS: Fix use-after-free in pnfs_update_layout()	19 Jul 202612:02	–	osv
OSV	DEBIAN-CVE-2026-63800	19 Jul 202612:16	–	osv
OSV	UBUNTU-CVE-2026-63800	20 Jul 202600:00	–	osv
Positive Technologies	PT-2026-61116	19 Jul 202600:00	–	ptsecurity
RedhatCVE	CVE-2026-63800	20 Jul 202617:09	–	redhatcve
SUSE CVE	SUSE CVE-2026-63800	19 Jul 202617:35	–	susecve

Vulners

CNA

Node

linux linux_kernelRange5.10.9–5.10.260

linux linux_kernelRange5.4.91–5.5

linux linux_kernelRange5.11–5.10.260

linux linux_kernelRange5.11.0–5.15.211

linux linux_kernelRange5.16.0–6.1.177

linux linux_kernelRange6.2.0–6.6.144

linux linux_kernelRange6.7.0–6.12.95

linux linux_kernelRange6.13.0–6.18.38

linux linux_kernelRange6.19.0–7.1.3

linux linux_kernelRange7.2.0–7.2-rc1

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nfs/pnfs.c"
    ],
    "versions": [
      {
        "version": "06f58dbc49a23c99e5c0f246879ed16667f7bf8f",
        "lessThan": "4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "1f24b8302c77dcaf79c64c073877a3b9f4dd25d2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "9c0fb5c09ae5bd68dc0038692af8127029cb0385",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "7e37e9b3e82ade881e1798e2f4fcc54aff7793c1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "2883ddd7542b4437a2ab4908fe2773f690e20889",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "200e7637f4d6a1342987045eea72641524f909dc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "9645aaf689aff57427ece3b9fa47d5b5399417f4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2c8d5fc37fe2384a9bdb6965443ab9224d46f704",
        "lessThan": "13e198a90ca4050f4bee8a3f23680389a6563ccc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa2399f55eff4ec78330bb6fe55f9df53e5cae0c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.10.9",
        "lessThan": "5.10.260",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.4.91",
        "lessThan": "5.5",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nfs/pnfs.c"
    ],
    "versions": [
      {
        "version": "5.11",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.11",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.260",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.211",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.177",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.144",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.95",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.38",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.3",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98
git	www.git.kernel.org/stable/c/9645aaf689aff57427ece3b9fa47d5b5399417f4
git	www.git.kernel.org/stable/c/1f24b8302c77dcaf79c64c073877a3b9f4dd25d2
git	www.git.kernel.org/stable/c/200e7637f4d6a1342987045eea72641524f909dc
git	www.git.kernel.org/stable/c/13e198a90ca4050f4bee8a3f23680389a6563ccc
git	www.git.kernel.org/stable/c/7e37e9b3e82ade881e1798e2f4fcc54aff7793c1
git	www.git.kernel.org/stable/c/2883ddd7542b4437a2ab4908fe2773f690e20889
git	www.git.kernel.org/stable/c/9c0fb5c09ae5bd68dc0038692af8127029cb0385

20 Jul 2026 15:16Current

5.5Medium risk

Vulners AI Score5.5

CVSS 3.19.8

EPSS0.00177