CVE-2026-98550

🗓️ 18 Oct 2026 15:18:18Reported by LinuxType

Linux kernel tipc rejects invalid GRP_ACK_MSG to prevent bc_ackers underflow.

Reporter	Title	Published	Views	Family All 9
Cvelist	CVE-2026-98550 tipc: reject invalid and unexpected GRP_ACK_MSG to prevent bc_ackers underflow	18 Oct 202615:18	–	cvelist
Debian CVE	CVE-2026-98550	18 Oct 202615:18	–	debiancve
EUVD	EUVD-2026-103595	18 Oct 202615:18	–	euvd
NVD	CVE-2026-98550	18 Oct 202616:17	–	nvd
osv_azl	AZL-109167 CVE-2026-98550 affecting package kernel 6.6.157.1-1	18 Oct 202616:17	–	osv_azl
osv_debian	DEBIAN-CVE-2026-98550	18 Oct 202617:47	–	osv_debian
Positive Technologies	PT-2026-116769	18 Oct 202600:00	–	ptsecurity
SUSE CVE	SUSE CVE-2026-98550	18 Oct 202623:45	–	susecve
UbuntuCve	CVE-2026-98550	19 Oct 202600:00	–	ubuntucve

Vulners

CNA

Node

linux linux_kernelRange4.15–5.10.271

linux linux_kernelRange5.11.0–5.15.222

linux linux_kernelRange5.16.0–6.1.189

linux linux_kernelRange6.2.0–6.6.158

linux linux_kernelRange6.7.0–6.12.112

linux linux_kernelRange6.13.0–6.18.55

linux linux_kernelRange6.19.0–7.2.9

linux linux_kernelRange7.3.0≥

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/tipc/group.c"
    ],
    "versions": [
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "edc6593c442278fceff0120e8cc58bc592168c35",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "9b94a90651e1fa573c6ac6a5a6b269d5874df2c0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "507a27435b2bb1f22e3a3674f6a6553eb815021b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "80a9ccfc24d3776ef6753a57315e726475fac7d7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "478fb08d0c2a53002a721d22b8d6681ec971d90f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "12cc3a1eac5a2a06b67a7b85f0f48ff241a94d1b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "b0e517961f09b9f60d338d1ea4e17aacdbf206f0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2f487712b89376fce267223bbb0db93d393d4b09",
        "lessThan": "99cc2a62e07a44a22254d7beca9ef1f8ad886d0d",
        "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/tipc/group.c"
    ],
    "versions": [
      {
        "version": "4.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.15",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.271",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.222",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.189",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.158",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.112",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.55",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.9",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/80a9ccfc24d3776ef6753a57315e726475fac7d7
git	www.git.kernel.org/stable/c/12cc3a1eac5a2a06b67a7b85f0f48ff241a94d1b
git	www.git.kernel.org/stable/c/b0e517961f09b9f60d338d1ea4e17aacdbf206f0
git	www.git.kernel.org/stable/c/478fb08d0c2a53002a721d22b8d6681ec971d90f
git	www.git.kernel.org/stable/c/9b94a90651e1fa573c6ac6a5a6b269d5874df2c0
git	www.git.kernel.org/stable/c/99cc2a62e07a44a22254d7beca9ef1f8ad886d0d
git	www.git.kernel.org/stable/c/507a27435b2bb1f22e3a3674f6a6553eb815021b
git	www.git.kernel.org/stable/c/edc6593c442278fceff0120e8cc58bc592168c35

19 Oct 2026 10:19Current

5.9Medium risk

Vulners AI Score5.9

EPSS0.0021