Vulnerability-Lookup

FKIE_CVE-2026-53002

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-09-10 13:20

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: remove sprintf usage Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check. Increase buffer size in mangle_content_len() while at it. BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b	Patch
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:64770
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:66000
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:66180
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-53002	Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2492329	Third Party Advisory
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-019113.html
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53002.json	Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
redhat	enterprise_linux	7.0
redhat	enterprise_linux	8.0
redhat	enterprise_linux	9.0
redhat	enterprise_linux	10.0

JSON

To clipboard

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          "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
          "vendor": "Siemens",
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              "version": "V3.1.6",
              "versionType": "custom"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: remove sprintf usage\n\nReplace it with scnprintf, the buffer sizes are expected to be large enough\nto hold the result, no need for snprintf+overflow check.\n\nIncrease buffer size in mangle_content_len() while at it.\n\nBUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270\nWrite of size 1 at addr [..]\n vsnprintf+0xea5/0x1270\n sprintf+0xb1/0xe0\n mangle_content_len+0x1ac/0x280\n nf_nat_sdp_session+0x1cc/0x240\n process_sdp+0x8f8/0xb80\n process_invite_request+0x108/0x2b0\n process_sip_msg+0x5da/0xf50\n sip_help_tcp+0x45e/0x780\n nf_confirm+0x34d/0x990\n [..]"
    }
  ],
  "id": "CVE-2026-53002",
  "lastModified": "2026-09-10T13:20:26.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
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        "impactScore": 5.9,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
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  },
  "published": "2026-06-24T17:17:11.263",
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}

CVE-2026-53002 (GCVE-0-2026-53002)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-09-10 12:04

Title

netfilter: conntrack: remove sprintf usage

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-787 - Out-of-bounds Write

Assigner

Linux mitre root Scorecard

References

15 references

URL	Tags
https://git.kernel.org/stable/c/2f793ba78470a99f4…
https://git.kernel.org/stable/c/6bbf829b4c1b44c94…
https://git.kernel.org/stable/c/ab64e61c9323fa6de…
https://git.kernel.org/stable/c/1c9fb8aeed06790d4…
https://git.kernel.org/stable/c/a8e0a32a23d3f3486…
https://git.kernel.org/stable/c/8e3be0d12615a173f…
https://git.kernel.org/stable/c/c08ff52e44945e6ef…
https://git.kernel.org/stable/c/6e7066bdb481a87fe…
https://access.redhat.com/security/cve/CVE-2026-53002	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2492329	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:66180	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:66000	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64770	vendor-advisoryx_refsource_REDHAT
https://cert-portal.siemens.com/productcert/html/…

Impacted products

12 products

Vendor	Product	Version
Linux	Linux	Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 2f793ba78470a99f40389b7dc60a81d9f5ad3956 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 6bbf829b4c1b44c941c47dd0d710f1393258f3d5 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < ab64e61c9323fa6de21bd20da1ddb29a0fb65d34 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < a8e0a32a23d3f34862af3b4da792ecb3a891a9a3 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 8e3be0d12615a173fe260cd42753ca7a001acbf2 (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < c08ff52e44945e6ef4ce0790f49ea761b060c45b (git) Affected: 9fafcd7b203229c3f3893a475741afc27e276306 , < 6e7066bdb481a87fe88c4fa563e348c03b2d373d (git)
Linux	Linux	Affected: 2.6.20 Unaffected: 0 , < 2.6.20 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 0:4.18.0-553.160.1.rt7.501.el8_10 , < * (rpm) cpe:/a:redhat:enterprise_linux:8::nfv
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 0:4.18.0-553.160.1.el8_10 , < * (rpm) cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:5.14.0-687.46.1.el9_8 , < * (rpm) cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: remove sprintf usage\n\nReplace it with scnprintf, the buffer sizes are expected to be large enough\nto hold the result, no need for snprintf+overflow check.\n\nIncrease buffer size in mangle_content_len() while at it.\n\nBUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270\nWrite of size 1 at addr [..]\n vsnprintf+0xea5/0x1270\n sprintf+0xb1/0xe0\n mangle_content_len+0x1ac/0x280\n nf_nat_sdp_session+0x1cc/0x240\n process_sdp+0x8f8/0xb80\n process_invite_request+0x108/0x2b0\n process_sip_msg+0x5da/0xf50\n sip_help_tcp+0x45e/0x780\n nf_confirm+0x34d/0x990\n [..]"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable SIP NAT helper is reached from network packet processing when a target acts as a SIP-aware NAT/conntrack gateway. A remote peer can send crafted SIP/SDP traffic through that configured path.\nAC:L - No race or hard-to-control state is required; the attacker controls the SIP/SDP payload and can drive the oversized Content-Length recomputation. The needed NAT/helper configuration is a normal deployment condition for SIP ALG/firewall use.\nPR:N - In the remote deployment scenario, the attacker only sends network traffic and does not need local credentials or administrative privileges on the target. Local helper setup would require CAP_NET_ADMIN, but that is not required when attacking an already configured SIP NAT gateway.\nUI:N - No victim user action is required once the vulnerable helper is active. Packet processing happens automatically in the netfilter conntrack/NAT path.\nS:U - The corruption occurs inside the Linux kernel networking stack and impacts the same kernel security authority. There is no VM, IOMMU, or cross-authority boundary change.\nC:H - This is kernel stack memory corruption from an out-of-bounds sprintf write. Even though the report shows a KASAN crash, such memory corruption can plausibly be leveraged toward broader kernel compromise, so the higher severity value is appropriate.\nI:H - The bug is an out-of-bounds write on the kernel stack in packet processing. Kernel memory corruption can plausibly alter control data or enable code execution, so integrity impact is high.\nA:H - The reported failure is a KASAN stack-out-of-bounds write in kernel context and can crash or panic the system. The crafted traffic can be sent repeatedly to sustain denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:32:32.201Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956"
        },
        {
          "url": "https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2"
        },
        {
          "url": "https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d"
        }
      ],
      "title": "netfilter: conntrack: remove sprintf usage",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53002",
    "datePublished": "2026-06-24T16:29:14.391Z",
    "dateReserved": "2026-06-09T07:44:35.377Z",
    "dateUpdated": "2026-09-10T12:04:52.973Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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FKIE_CVE-2026-53002

CVE-2026-53002 (GCVE-0-2026-53002)

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