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TI-2026-83828 Aliases CVE-2026-120436GHSA-wj4q-h4hq-8gh7

Heap overflow in Netpbm jbigtopnm can crash the tool or run code

Priority LOW 38CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 4 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

Netpbm before 10.86.51, from 11.0 before 11.02.30, and from 11.03 before 11.15.08 are affected. An integer overflow (CWE-190) in jbigtopnm computes an output buffer that is too small, so writing decoded data overflows the heap. An attacker can supply a crafted multi-plane JBIG file with large header dimensions, so the tool can crash or potentially execute code.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Netpbm before 10.86.51, 11.x before 11.02.30, and 11.03 before 11.15.08 contains an integer overflow in jbigtopnm that causes heap buffer overflow when computing output buffer size. Attackers can supply a crafted multi-plane JBIG file with large header dimensions so jbg_dec_merge_planes() overflows the undersized buffer, causing crashes or potentially code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00182 7th percentileScored 2026-11-07
Fix Partial Netpbm (Netpbm): 10.86.51, 11.02.30, 11.15.08Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NetpbmNetpbmbefore 10.86.51; 11.0 to before 11.02.30; 11.03 to before 11.15.0810.86.51, 11.02.30, 11.15.08Patch availableCNA
  • Netpbm VendorNetpbm Affected before 10.86.51; 11.0 to before 11.02.30; 11.03 to before 11.15.08 Fixed in 10.86.51, 11.02.30, 11.15.08 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:netpbm_project:netpbm:*:*:*:*:*:*:*:*——Netpbm Project
  • cpe:2.3:a:netpbm_project:netpbm:*:*:*:*:*:*:*:* Versions — — ·Netpbm Project

Remediation

Update Netpbm to 10.86.51, 11.02.30 or 11.15.08, matching the release branch in use. Red Hat lists Red Hat Enterprise Linux 6, 7, 8 and 10 as affected, with no fix available yet.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Netpbm (Netpbm) Fixed in 10.86.51, 11.02.30, 11.15.08

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Netpbm 10.86.51, 11.02.30, 11.15.08

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2026-83827 Heap overflow in Netpbm xpmtoppm can crash or run codePriority LOW 38
    • TI-2026-83826 Stack buffer overflow in Netpbm picttoppm converterPriority LOW 38
    • TI-2026-83825 Stack buffer overflow in Netpbm picttoppm paintPoly()Priority LOW 38
    Show all 6 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 6AffectedNo fix yet
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-120436
  2. 2026-11-02 Alias added: GHSA-wj4q-h4hq-8gh7
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: MEDIUM → LOW
  5. 2026-11-02 Affected versions changed · Red Hat
  6. 2026-11-02 CVSS score added · Red Hat
  7. 2026-11-06 Affected versions changed · Red Hat

References

Patch 1

Other 4

  • TI-2026-76476 Heap out-of-bounds read in Netpbm rasttopnm leaks memory CVSS 4.0MEDIUM 6.9
  • TI-2003-00141 Multiple vulnerabilities in NetPBM 9.20 and earlier, and possibly other versions, may… CVSS 2.0HIGH 7.5
  • TI-2005-02810 pnmtopng in netpbm before 10.25, when using the -trans option, uses uninitialized size… CVSS 2.0HIGH 7.5
  • TI-2009-04054 Stack-based buffer overflow in converter/ppm/xpmtoppm.c in netpbm before 10.47.07 allows… CVSS 2.0HIGH 7.5
  • TI-2005-02339 pstopnm in netpbm does not properly use the "-dSAFER" option when calling Ghostscript to… CVSS 2.0HIGH 7.5
  • TI-2026-83827 Heap overflow in Netpbm xpmtoppm can crash or run code CVSS 4.0HIGH 8.5
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences