CVE-2026-63809

🗓️ 19 Jul 2026 12:02:11Reported by LinuxType

CVE-2026-63809: bpf sysctl write buffer is freed with kvfree() to handle kvzalloc and vmalloc allocations.

Reporter	Title	Published	Views	Family All 6
ATTACKERKB	CVE-2026-63809	19 Jul 202612:02	–	attackerkb
Cvelist	CVE-2026-63809 bpf: use kvfree() for replaced sysctl write buffer	19 Jul 202612:02	–	cvelist
EUVD	EUVD-2026-45475	19 Jul 202612:02	–	euvd
NVD	CVE-2026-63809	19 Jul 202612:16	–	nvd
OSV	DEBIAN-CVE-2026-63809	19 Jul 202615:48	–	osv
Positive Technologies	PT-2026-61125	19 Jul 202600:00	–	ptsecurity

Vulners

CNA

Node

linux linux_kernelRange5.10.20–5.10.260

linux linux_kernelRange5.11.3–5.12

linux linux_kernelRange5.12–5.10.260

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": [
      "kernel/bpf/cgroup.c"
    ],
    "versions": [
      {
        "version": "b7925acd82926ebbf94a0f0783a3961f4e558856",
        "lessThan": "d0a81ed5ff5d0f9c3f63a4f9e5a4642c363ecd3e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4508943794efdd94171549c0bd52810e2f4ad9fe",
        "lessThan": "77355ef7a9f6b0d2bdf65be3b37f2c1f365e20d2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4508943794efdd94171549c0bd52810e2f4ad9fe",
        "lessThan": "e1d1e203a6000804c5d3b8a4aa4e52303c0c7ab2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4508943794efdd94171549c0bd52810e2f4ad9fe",
        "lessThan": "81fc9a13acae99966232f0e055eb2e445263b89a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4508943794efdd94171549c0bd52810e2f4ad9fe",
        "lessThan": "838fe9c28121777c59a9406710a68fcf77bb8017",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4508943794efdd94171549c0bd52810e2f4ad9fe",
        "lessThan": "65bd0c0afb0e1bf3287458e342429b069624f7d4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4508943794efdd94171549c0bd52810e2f4ad9fe",
        "lessThan": "70df4de46577fab5e25418f014583155a147c902",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4508943794efdd94171549c0bd52810e2f4ad9fe",
        "lessThan": "4c21b5927d4364bfe7365f2700da5fea0ed0d004",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "66258ab303588936ee1ee0794d9a271be24f73cb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.10.20",
        "lessThan": "5.10.260",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.11.3",
        "lessThan": "5.12",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/bpf/cgroup.c"
    ],
    "versions": [
      {
        "version": "5.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.12",
        "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/77355ef7a9f6b0d2bdf65be3b37f2c1f365e20d2
git	www.git.kernel.org/stable/c/d0a81ed5ff5d0f9c3f63a4f9e5a4642c363ecd3e
git	www.git.kernel.org/stable/c/81fc9a13acae99966232f0e055eb2e445263b89a
git	www.git.kernel.org/stable/c/70df4de46577fab5e25418f014583155a147c902
git	www.git.kernel.org/stable/c/e1d1e203a6000804c5d3b8a4aa4e52303c0c7ab2
git	www.git.kernel.org/stable/c/838fe9c28121777c59a9406710a68fcf77bb8017
git	www.git.kernel.org/stable/c/65bd0c0afb0e1bf3287458e342429b069624f7d4
git	www.git.kernel.org/stable/c/4c21b5927d4364bfe7365f2700da5fea0ed0d004

19 Jul 2026 12:16Current

5.6Medium risk

Vulners AI Score5.6