CVE-2026-64088 batman-adv: tt: fix negative tt_buff_len

🗓️ 19 Jul 2026 15:39:58Reported by LinuxType

Fixed negative tt_buff_len in batman-adv by using unsigned16 to prevent sign extension.

Reporter	Title	Published	Views	Family All 11
CVE	CVE-2026-64088	19 Jul 202615:39	–	cve
EUVD	EUVD-2026-45773	19 Jul 202615:39	–	euvd
NVD	CVE-2026-64088	19 Jul 202616:17	–	nvd
OSV	CVE-2026-64088 batman-adv: tt: fix negative tt_buff_len	19 Jul 202615:39	–	osv
OSV	DEBIAN-CVE-2026-64088	19 Jul 202616:17	–	osv
OSV	UBUNTU-CVE-2026-64088	20 Jul 202600:00	–	osv
Positive Technologies	PT-2026-61405	19 Jul 202600:00	–	ptsecurity
RedhatCVE	CVE-2026-64088	21 Jul 202606:23	–	redhatcve
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-64088	20 Jul 202600:00	–	nessus
Ubuntu	USN-8575-1: Linux kernel vulnerabilities	21 Jul 202610:01	–	ubuntu

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/batman-adv/types.h"
    ],
    "versions": [
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "4c4c2f340f4c27373bfcac8dc5032ce7bb474e47",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "3c96dff00998314983b68a3e7caac07a66ebe496",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "32edd2a28e112064020a2f319a8cb8a9e5a09767",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "4dab98961426d0cf6a1599cda6950b7596ca2fcd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "730de8733dd90f70d7580a9b329b971f8e1474a2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "ed28ead3420c373a7928622f114bc6168075d1e1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a73105b8d4c765d9ebfb664d0a66802127d8e4c7",
        "lessThan": "b64963a2ceeb7529310b6cf253a1e540784422f4",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/batman-adv/types.h"
    ],
    "versions": [
      {
        "version": "3.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.1",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.258",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.209",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.175",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.142",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.92",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.34",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.11",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/3c96dff00998314983b68a3e7caac07a66ebe496
git	www.git.kernel.org/stable/c/4c4c2f340f4c27373bfcac8dc5032ce7bb474e47
git	www.git.kernel.org/stable/c/4dab98961426d0cf6a1599cda6950b7596ca2fcd
git	www.git.kernel.org/stable/c/32edd2a28e112064020a2f319a8cb8a9e5a09767
git	www.git.kernel.org/stable/c/33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430
git	www.git.kernel.org/stable/c/730de8733dd90f70d7580a9b329b971f8e1474a2
git	www.git.kernel.org/stable/c/b64963a2ceeb7529310b6cf253a1e540784422f4
git	www.git.kernel.org/stable/c/ed28ead3420c373a7928622f114bc6168075d1e1

20 Jul 2026 13:43Current

CVSS 3.18.8

EPSS0.00184