CVE-2026-43503

🗓️ 23 May 2026 11:44:01Reported by LinuxType

cve🔗 web.nvd.nist.gov📰️ 16 Media mentions👁 302 Views

Linux kernel fix preserves shared-frag marker during skb coalescing to prevent ESP decryption.

Reporter	Title	Published	Views	Family All 418
GithubExploit	Exploit for CVE-2026-43503	29 Jun 202604:44	–	githubexploit
GithubExploit	Exploit for CVE-2026-43503	29 Jun 202615:34	–	githubexploit
GithubExploit	Exploit for CVE-2026-43503	26 Jun 202600:20	–	githubexploit
GithubExploit	pagecache-lpe-containment-kit	27 Jun 202614:23	–	githubexploit
GithubExploit	Exploit for CVE-2026-43503	28 Jun 202603:23	–	githubexploit
GithubExploit	Exploit for CVE-2026-43503	26 Jun 202621:01	–	githubexploit
GithubExploit	Exploit for CVE-2026-43503	26 Jun 202611:06	–	githubexploit
ATTACKERKB	CVE-2026-43503	23 May 202611:44	–	attackerkb
Tenable Nessus	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1708)	16 May 202600:00	–	nessus
Tenable Nessus	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1709)	16 May 202600:00	–	nessus

NVD

Vulners

CNA

Node

linux linux_kernelRange3.9–5.10.257

linux linux_kernelRange5.11–5.15.208

linux linux_kernelRange5.16–6.1.174

linux linux_kernelRange6.2–6.6.141

linux linux_kernelRange6.7–6.12.91

linux linux_kernelRange6.13–6.18.33

linux linux_kernelRange6.19–7.0.10

linux linux_kernelMatch7.1rc1

linux linux_kernelMatch7.1rc2

linux linux_kernelMatch7.1rc3

linux linux_kernelMatch7.1rc4

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/gro.c",
      "net/core/skbuff.c",
      "net/ipv4/tcp_output.c"
    ],
    "versions": [
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "fbeab9555564a1b98e8582cd106dfe46c4606991",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "179f1852bdedc300e373e807cc102cd81feff196",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "12401fcfb01f53ccc63ab0a3246570fe8f3105ee",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "989214c66884d70716d83dc1d0bf5e16287bf349",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "fc6eb39c55e97df2f94ad974b8a5bbcd019da2c8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "ff375cc75f9167168db38e0464a482d5fbc8d81d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "9bc9d6d6967a2239aa57af2aa53554eddd640d20",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cef401de7be8c4e155c6746bfccf721a4fa5fab9",
        "lessThan": "48f6a5356a33dd78e7144ae1faef95ffc990aae0",
        "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/core/gro.c",
      "net/core/skbuff.c",
      "net/ipv4/tcp_output.c"
    ],
    "versions": [
      {
        "version": "3.9",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.9",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.257",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.208",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.174",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.141",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.91",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.33",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.10",
        "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/989214c66884d70716d83dc1d0bf5e16287bf349
git	www.git.kernel.org/stable/c/12401fcfb01f53ccc63ab0a3246570fe8f3105ee
git	www.git.kernel.org/stable/c/fbeab9555564a1b98e8582cd106dfe46c4606991
git	www.git.kernel.org/stable/c/fc6eb39c55e97df2f94ad974b8a5bbcd019da2c8
git	www.git.kernel.org/stable/c/48f6a5356a33dd78e7144ae1faef95ffc990aae0
git	www.git.kernel.org/stable/c/9bc9d6d6967a2239aa57af2aa53554eddd640d20
git	www.git.kernel.org/stable/c/179f1852bdedc300e373e807cc102cd81feff196
git	www.git.kernel.org/stable/c/ff375cc75f9167168db38e0464a482d5fbc8d81d
access	www.access.redhat.com/security/cve/CVE-2026-43503
access	www.access.redhat.com/errata/RHSA-2026:23245

02 Jul 2026 12:17Current

5.8Medium risk

Vulners AI Score5.8

CVSS 3.18.8

EPSS0.00135

CWE-664