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  4. CVE 2026 53002 netfilter conntrack remove sprintf usage
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Back to active CVEs
Critical ยท CVSS 9.8CVE-2026-53002

netfilter: conntrack: remove sprintf usageCVE-2026-53002

Answer in brief

CVE-2026-53002 records a Critical severity (CVSS 9.8) vulnerability in netfilter: conntrack: remove sprintf usage. The current sources do not mark it as known exploited. The current feed maps Red Hat/kernel (generic), Red Hat/kernel-rt (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 24, 2026Updated Oct 19, 2026Source checked Nov 4, 2026First seen by HOL Jun 24, 2026Material review Oct 19, 2026
Upstream Advisory

Key facts

Risk
Critical ยท CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
15 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/kernel (generic), Red Hat/kernel-rt (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/kernelgeneric*Not reported
Red Hat/kernel-rtgeneric*Not reported
Linux/Linuxgeneric>=9fafcd7b203229c3f3893a475741afc27e276306 <2f793ba78470a99f40389b7dc60a81d9f5ad3956 || >=9fafcd7b203229c3f3893a475741afc27e276306 <6bbf829b4c1b44c941c47dd0d710f1393258f3d5 || >=9fafcd7b203229c3f3893a475741afc27e276306 <ab64e61c9323fa6de21bd20da1ddb29a0fb65d34 || >=9fafcd7b203229c3f3893a475741afc27e276306 <1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e || >=9fafcd7b203229c3f3893a475741afc27e276306 <a8e0a32a23d3f34862af3b4da792ecb3a891a9a3 || >=9fafcd7b203229c3f3893a475741afc27e276306 <8e3be0d12615a173fe260cd42753ca7a001acbf2 || >=9fafcd7b203229c3f3893a475741afc27e276306 <c08ff52e44945e6ef4ce0790f49ea761b060c45b || >=9fafcd7b203229c3f3893a475741afc27e276306 <6e7066bdb481a87fe88c4fa563e348c03b2d373d2f793ba78470a99f40389b7dc60a81d9f5ad3956, 6bbf829b4c1b44c941c47dd0d710f1393258f3d5, ab64e61c9323fa6de21bd20da1ddb29a0fb65d34, 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e, a8e0a32a23d3f34862af3b4da792ecb3a891a9a3, 8e3be0d12615a173fe260cd42753ca7a001acbf2, c08ff52e44945e6ef4ce0790f49ea761b060c45b, 6e7066bdb481a87fe88c4fa563e348c03b2d373d
Linux/Linuxgeneric2.6.20Not reported
Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric>=V3.1.6 <**
Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric>=V3.1.7 <**
Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric>=V3.1.6 <**
Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric>=V3.1.7 <**
Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric>=V3.1.6 <**
Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric>=V3.1.7 <**

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/kernel, Red Hat/kernel-rt, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 2f793ba78470a99f40389b7dc60a81d9f5ad3956; Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP to *; Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP to *; Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP to *; Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP to *; Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFP to *; Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFP to * if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jun 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 24, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • Source referencecert-portal.siemens.com
  • Source referencecert-portal.siemens.com
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencesecurity.access.redhat.com
Upstream source description

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 [..]

Quoted source text, attributed separately from HOL analysis.

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  • Git for Windows: git-credential-wincred OAuth Store Heap OverflowAlso CWE-787
  • Git for Windows: git-credential-wincred Erase Path Heap OverflowAlso CWE-787
  • FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 CapabilityAlso CWE-787
  • FreeRDP before 3.32.2 Heap Out-of-Bounds Write in Planar CodecAlso CWE-787
  • FreeRDP before 3.32.2 Heap Buffer Overflow via Early User Authorization ReadAlso CWE-787

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Nov 4, 2026
References
16 linked sources
Open source record