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NVD / CVE Program· CNA GitHub_M

CVE-2022-24724: Integer overflow in table parsing extension leads to heap memory corruption

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.5% (FIRST EPSS); higher than 91.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: pandoc (AlmaLinux:8) 2.0.6-6.el8_6; pandoc-common (AlmaLinux:8) 2.0.6-6.el8_6; cmark-gfm (Debian:12) 0.29.0.gfm.3-3.

Add it to your regular patch cycle. Upgrade to pandoc (AlmaLinux:8) 2.0.6-6.el8_6; pandoc-common (AlmaLinux:8) 2.0.6-6.el8_6; cmark-gfm (Debian:12) 0.29.0.gfm.3-3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

cmark-gfm is GitHub's extended version of the C reference implementation of CommonMark. Prior to versions 0.29.0.gfm.3 and 0.28.3.gfm.21, an integer overflow in cmark-gfm's table row parsing `table.c:row_from_string` may lead to heap memory corruption when parsing tables who's marker rows contain more than UINT16_MAX columns. The impact of this heap corruption ranges from Information Leak to Arbitrary Code Execution depending on how and where `cmark-gfm` is used. If `cmark-gfm` is used for rendering remote user controlled markdown, this vulnerability may lead to Remote Code Execution (RCE) in applications employing affected versions of the `cmark-gfm` library. This vulnerability has been patched in the following cmark-gfm versions 0.29.0.gfm.3 and 0.28.3.gfm.21. A workaround is available. The vulnerability exists in the table markdown extensions of cmark-gfm. Disabling the table extension will prevent this vulnerability from being triggered.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Mar 3, 2022
Updated
Jun 17, 2026
EPSS
4.5% · 91th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.5%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.8
CNA · GitHub_M
8.8
1.0 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-24724

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
githubcmark-gfm
fedoraprojectfedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject fedora34
  • fedoraproject fedora35
  • fedoraproject fedora36
  • github cmark-gfmbefore 0.28.3.gfm.21
  • github cmark-gfmafter 0.28.3.gfm.21 · before 0.29.0.gfm.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • github cmark-gfm

    • < 0.28.3.gfm.21, >= 0.29.0.gfm.0, < 0.29.0.gfm.3affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8pandocbefore 2.0.6-6.el8_62.0.6-6.el8_6
AlmaLinux:8pandoc-commonbefore 2.0.6-6.el8_62.0.6-6.el8_6
Debian:12cmark-gfmbefore 0.29.0.gfm.3-30.29.0.gfm.3-3
Debian:12ghostwriterbefore 2.1.6+ds-12.1.6+ds-1
Debian:12python-cmarkgfmbefore 0.7.0-10.7.0-1
Debian:12r-cran-commonmarkbefore 1.8.0-11.8.0-1
Debian:12ruby-commonmarkerbefore 0.23.4-10.23.4-1
Red Hat:enterprise_linux:8::crbpandocbefore 0:2.0.6-6.el8_60:2.0.6-6.el8_6
Red Hat:enterprise_linux:8::crbpandoc-commonbefore 0:2.0.6-6.el8_60:2.0.6-6.el8_6
Rocky Linux:8pandocbefore 0:2.0.6-6.el8_60:2.0.6-6.el8_6

Same product

github: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-22051CommonMarker Integer Overflow Vulnerability
    39Monitor
  • CVE-2023-37463Quadratic complexity bugs may lead to a denial of service
    30Monitor
  • CVE-2023-26485Quadratic complexity may lead to a denial of service in cmark-gfm
    30Monitor

Published before and after this one in the same product

  • Later →CVE-2022-39209Sep 15, 2022 · Uncontrolled Resource Consumption in cmark-gfm
    27Monitor
  • Later →CVE-2023-22483Jan 23, 2023 · cmark-gfm Quadratic complexity bugs may lead to a denial of service
    30Monitor
  • Later →CVE-2023-22484Jan 23, 2023 · Inefficient Quadratic complexity bug in handle_pointy_brace may lead to a denial of service
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:pandoc2.0.6-6.el8_6 · AlmaLinux:8Package registry (OSV)
almalinux:pandoc-common2.0.6-6.el8_6 · AlmaLinux:8Package registry (OSV)
debian:cmark-gfm0.29.0.gfm.3-3 · Debian:12Package registry (OSV)
debian:ghostwriter2.1.6+ds-1 · Debian:12Package registry (OSV)
debian:python-cmarkgfm0.7.0-1 · Debian:12Package registry (OSV)
debian:r-cran-commonmark1.8.0-1 · Debian:12Package registry (OSV)
debian:ruby-commonmarker0.23.4-1 · Debian:12Package registry (OSV)
red hat:pandoc0:2.0.6-6.el8_6 · Red Hat:enterprise_linux:8::crbPackage registry (OSV)
red hat:pandoc-common0:2.0.6-6.el8_6 · Red Hat:enterprise_linux:8::crbPackage registry (OSV)
rocky linux:pandoc0:2.0.6-6.el8_6 · Rocky Linux:8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records