CVE-2026-43037

🗓️ 01 May 2026 14:15:35Reported by LinuxType

cve🔗 web.nvd.nist.gov📰️ 1 Media mentions👁 118 Views

Linux kernel fix clears skb2->cb[] in ip4ip6_err and validates IPv4 header (version 4, ihl>=5).

Reporter	Title	Published	Views	Family All 318
ATTACKERKB	CVE-2026-43037	1 May 202614:15	–	attackerkb
Tenable Nessus	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-1681)	9 May 202600:00	–	nessus
Tenable Nessus	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1695)	9 May 202600:00	–	nessus
Tenable Nessus	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1746)	27 May 202600:00	–	nessus
Tenable Nessus	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2026-118 (ALASKERNEL-5.10-2026-118)	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	AlmaLinux 8 : kernel-rt (ALSA-2026:25120)	11 Jun 202600:00	–	nessus
Tenable Nessus	AlmaLinux 8 : kernel (ALSA-2026:25121)	11 Jun 202600:00	–	nessus
Tenable Nessus	AlmaLinux 10 : kernel (ALSA-2026:25191)	11 Jun 202600:00	–	nessus
Tenable Nessus	AlmaLinux 9 : kernel (ALSA-2026:25217)	11 Jun 202600:00	–	nessus

NVD

Vulners

CNA

Node

linux linux_kernelRange2.6.22–5.10.253

linux linux_kernelRange5.11–5.15.203

linux linux_kernelRange5.16–6.1.168

linux linux_kernelRange6.2–6.6.134

linux linux_kernelRange6.7–6.12.81

linux linux_kernelRange6.13–6.18.22

linux linux_kernelRange6.19–6.19.12

linux linux_kernelMatch7.0rc1

linux linux_kernelMatch7.0rc2

linux linux_kernelMatch7.0rc3

linux linux_kernelMatch7.0rc4

linux linux_kernelMatch7.0rc5

linux linux_kernelMatch7.0rc6

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_tunnel.c"
    ],
    "versions": [
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "ea9f65b27c8404e164848ebff1443310fd187629",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "d6621f60192fe10c047a4487be42a6f4c150707f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "2cc6e3b0fe0f0242d1f530a93a4924f48ab85ba5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "a0c4ce9900a108eaf55d0f3b399cb55999647d39",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "1063515ce15ff31065c4e7f8265f4c2fd3c54876",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "590f622669b97eaf7b57a1de7b0a6e68c5d8b2c3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "4a622658f384b03560834cbe8ffcfe69a278f7c8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c4d3efafcc933fd2ffd169d7dc4f980393a13796",
        "lessThan": "2edfa31769a4add828a7e604b21cb82aaaa05925",
        "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/ipv6/ip6_tunnel.c"
    ],
    "versions": [
      {
        "version": "2.6.22",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.22",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.253",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.203",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.168",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.134",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.81",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.22",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.12",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/a0c4ce9900a108eaf55d0f3b399cb55999647d39
git	www.git.kernel.org/stable/c/590f622669b97eaf7b57a1de7b0a6e68c5d8b2c3
git	www.git.kernel.org/stable/c/1063515ce15ff31065c4e7f8265f4c2fd3c54876
git	www.git.kernel.org/stable/c/2edfa31769a4add828a7e604b21cb82aaaa05925
git	www.git.kernel.org/stable/c/ea9f65b27c8404e164848ebff1443310fd187629
git	www.git.kernel.org/stable/c/4a622658f384b03560834cbe8ffcfe69a278f7c8
git	www.git.kernel.org/stable/c/d6621f60192fe10c047a4487be42a6f4c150707f
git	www.git.kernel.org/stable/c/2cc6e3b0fe0f0242d1f530a93a4924f48ab85ba5
access	www.access.redhat.com/errata/RHSA-2026:25120
access	www.access.redhat.com/errata/RHSA-2026:25181

10 Jul 2026 12:16Current

5.8Medium risk

Vulners AI Score5.8

CVSS 3.19.8

EPSS0.00563