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Unexpected code execution and arbitrary file write via Clang -gen-* and GCC -gnat* flags in cgo in cmd/go

No KEV listing collectedCVSS 7.4Fix not stated

Assessment

Severity
Important
CVSS base score
7.4
Impact
Not stated
Exploitation detected
Unknown: not stated by MSRC
Exploitability
Not assessed
Publicly disclosed
Unknown: not stated by MSRC
EPSS · 30-day forecast
No EPSS score collected
Customer action
Required: follow the MSRC remediation guidance
More details
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Mariner
Weakness
—
Issued by
Go
Published
13 Nov 2026 · November 2026
Last revised
13 Nov 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
LocalAV:L
Attack complexity
HighAC:H
Privileges required
NonePR:N
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Mariner, Open Source Software
7 affected products
  • azl3 gcc 13.2.0-7 on Azure Linux 3.0
  • azl3 golang 1.26.10-1 on Azure Linux 3.0
  • azl3 golang 1.26.11-1 on Azure Linux 3.0
  • azl3 golang 1.27.3-1 on Azure Linux 3.0
  • azl3 golang 1.27.4-1 on Azure Linux 3.0
  • azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0
  • azl3 tensorflow 2.16.1-11 on Azure Linux 3.0

What changed

  1. Affected products: azl3 gcc 13.2.0-7 on Azure Linux 3.0, azl3 golang 1.26.10-1 on Azure Linux 3.0, azl3 golang 1.27.3-1 on Azure Linux 3.0, azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0 → azl3 gcc 13.2.0-7 on Azure Linux 3.0, azl3 golang 1.26.10-1 on Azure Linux 3.0, azl3 golang 1.26.11-1 on Azure Linux 3.0, azl3 golang 1.27.3-1 on Azure Linux 3.0, azl3 golang 1.27.4-1 on Azure Linux 3.0, azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0
  2. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  3. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (10)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 14 Nov 2026 · 08:16:23 UTC Last revised13 Nov 2026 01:04 UTC → 13 Nov 2026 14:51 UTC
  2. 14 Nov 2026 · 08:16:23 UTC Affected productsazl3 gcc 13.2.0-7 on Azure Linux 3.0, azl3 golang 1.26.10-1 on Azure Linux 3.0, azl3 golang 1.27.3-1 on Azure Linux 3.0, azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0 → azl3 gcc 13.2.0-7 on Azure Linux 3.0, azl3 golang 1.26.10-1 on Azure Linux 3.0, azl3 golang 1.26.11-1 on Azure Linux 3.0, azl3 golang 1.27.3-1 on Azure Linux 3.0, azl3 golang 1.27.4-1 on Azure Linux 3.0, azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0
  3. 13 Nov 2026 · 12:10:20 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. 13 Nov 2026 · 12:10:20 UTC Source coverage: public-exploit-codeIncomplete → Current
  5. 13 Nov 2026 · 12:10:20 UTC Source coverage: first-epssIncomplete → Current
  6. 13 Nov 2026 · 12:10:20 UTC Source coverage: msrc-cvrfIncomplete → Current
  7. 13 Nov 2026 · 11:07:20 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  8. 13 Nov 2026 · 11:07:20 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  9. 13 Nov 2026 · 11:07:20 UTC Source coverage: first-epssCurrent → Incomplete
  10. 13 Nov 2026 · 11:07:20 UTC Source coverage: msrc-cvrfCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2026-97035. The catalog has a separate collection scope from Microsoft release records.

More advisories, affected versions and source history

Exploitation and risk

Source status

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

Which CVEs have scores here?

This view includes predictions for CVE identifiers explicitly listed in public NuGet advisories. Microsoft release pages have their own prediction coverage. Check source status for the scope and latest checks.

No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.

cve-program · CVE-2026-97035

Published

Unexpected code execution and arbitrary file write via Clang -gen-* and GCC -gnat* flags in cgo in cmd/go

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the compiler and linker flag allowlists previously matched Clang's two-argument "-gen-cdb-fragment-path <dir>" flag and GCC's two-argument "-gnatO <file>" flag, permitting compilation database fragments and sidecar output files to be written to arbitrary directories and desynchronizing flag argument parsing between the go command and the compiler driver so that subsequent arguments could be passed as unvalidated positional inputs to the linker. "-gen-*" and "-gnat*" flags are now disallowed in "#cgo" compiler and linker flags.

Source published
11 Nov 2026 03:13:16 UTC
Source modified
11 Nov 2026 03:13:16 UTC
Saved here
11 Nov 2026 04:25:37 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

euvd · EUVD-2026-123110

Published

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the c…

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the compiler and linker flag allowlists previously matched Clang's two-argument "-gen-cdb-fragment-path <dir>" flag and GCC's two-argument "-gnatO <file>" flag, permitting compilation database fragments and sidecar output files to be written to arbitrary directories and desynchronizing flag argument parsing between the go command and the compiler driver so that subsequent arguments could be passed as unvalidated positional inputs to the linker. "-gen-*" and "-gnat*" flags are now disallowed in "#cgo" compiler and linker flags.

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Nov 11, 2026, 3:13:16 AM

dateUpdated: Nov 11, 2026, 3:13:16 AM

1 related source bulletins · separate from aliases

WID-SEC-W-2026-4370: Golang Go: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

CVE-2026-97033 · CVE-2026-97034 · CVE-2026-97035 · CVE-2026-97036 · CVE-2026-97037 · CVE-2026-97038 · CVE-2026-97039 · CVE-2026-97040 · CVE-2026-97041 · CVE-2026-97042 · CVE-2026-97043 · CVE-2026-97054

Source published
Nov 11, 2026, 3:13:16 AM (timezone not stated)
Source modified
Nov 11, 2026, 3:13:16 AM (timezone not stated)
Saved here
13 Nov 2026 05:18:58 UTC
Source terms
ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

nvd · CVE-2026-97035

Published

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the c…

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the compiler and linker flag allowlists previously matched Clang's two-argument "-gen-cdb-fragment-path <dir>" flag and GCC's two-argument "-gnatO <file>" flag, permitting compilation database fragments and sidecar output files to be written to arbitrary directories and desynchronizing flag argument parsing between the go command and the compiler driver so that subsequent arguments could be passed as unvalidated positional inputs to the linker. "-gen-*" and "-gnat*" flags are now disallowed in "#cgo" compiler and linker flags.

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Original publisher date fields

published: 2026-11-11T05:19:57.550

lastModified: 2026-11-12T22:09:39.233

Source published
11 Nov 2026 05:19:57 UTC
Source modified
12 Nov 2026 22:09:39 UTC
Saved here
13 Nov 2026 06:18:20 UTC
Source terms
NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

osv · GO-2026-6856

Published

Unexpected code execution and arbitrary file write via Clang -gen-* and GCC -gnat* flags in cgo in cmd/go

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the compiler and linker flag allowlists previously matched Clang's two-argument "-gen-cdb-fragment-path <dir>" flag and GCC's two-argument "-gnatO <file>" flag, permitting compilation database fragments and sidecar output files to be written to arbitrary directories and desynchronizing flag argument parsing between the go command and the compiler driver so that subsequent arguments could be passed as unvalidated positional inputs to the linker. "-gen-*" and "-gnat*" flags are now disallowed in "#cgo" compiler and linker flags.

Source published
11 Nov 2026 02:51:11 UTC
Source modified
11 Nov 2026 03:15:15 UTC
Saved here
11 Nov 2026 04:27:36 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 15 Nov 00:38 UTC · 256 of 275 readable · 254 fully read · documentation 469/469 current