CVE-2026-56288

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-09. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer to fwrite() during patch processing. An attacker can trigger this condition with a malicious patch file, causing the utility to crash and resulting in a denial of service.

This issue has been fixed in the commit e6d6a4e021660679d7fc9150f981d4920f722313

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 13, 2026

Advisory Details (2)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

patch.git - GNU patch

https://cgit.git.savannah.gnu.org/cgit/patch.git/
generic

Vulnerabilities in GNU patch software | CERT Polska

https://cert.pl/en/posts/2026/07/CVE-2026-56288

Vendor Advisories for CVE-2026-56288(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpatch-main-2.8-4.3.hum12026-07-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
patch2.7.6-7, 2.8-1, 2.8-2——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
patch2.7.6-7, 2.8-1, 2.8-2——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
patch2.8-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
patch2.8-2——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 22× in last 7d / 105× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 158 total refreshes for this CVE.

  1. 2026-08-30 06:57 UTCEG score recompute
  2. 2026-08-30 06:57 UTCVendor advisory
  3. 2026-08-30 06:57 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:41 UTCEPSS rescore
  6. 2026-08-28 02:42 UTCEG score recompute
  7. 2026-08-28 02:42 UTCVendor advisory
  8. 2026-08-28 02:42 UTCGHSA enrichment
  9. 2026-08-27 14:25 UTCEPSS rescore
  10. 2026-08-27 02:47 UTCEG score recompute
  11. 2026-08-27 02:47 UTCVendor advisory
  12. 2026-08-27 02:46 UTCGHSA enrichment
  13. 2026-08-26 14:46 UTCEPSS rescore
  14. 2026-08-26 03:55 UTCEG score recompute
  15. 2026-08-26 03:55 UTCVendor advisory
  16. 2026-08-26 03:55 UTCGHSA enrichment
  17. 2026-08-25 13:49 UTCEPSS rescore
  18. 2026-08-24 23:49 UTCEG score recompute
  19. 2026-08-24 23:49 UTCVendor advisory
  20. 2026-08-24 23:49 UTCGHSA enrichment
  21. 2026-08-24 01:06 UTCVendor advisory
  22. 2026-08-24 01:06 UTCGHSA enrichment
  23. 2026-08-23 02:22 UTCEG score recompute
  24. 2026-08-23 02:22 UTCVendor advisory
  25. 2026-08-23 02:22 UTCGHSA enrichment
Show 75 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-22 03:39 UTCEG score recompute
  3. 2026-08-22 03:39 UTCVendor advisory
  4. 2026-08-22 03:39 UTCGHSA enrichment
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-21 04:22 UTCEG score recompute
  7. 2026-08-21 04:22 UTCVendor advisory
  8. 2026-08-21 04:22 UTCGHSA enrichment
  9. 2026-08-20 22:55 UTCEPSS rescore
  10. 2026-08-20 05:38 UTCEG score recompute
  11. 2026-08-20 05:38 UTCGHSA enrichment
  12. 2026-08-19 17:04 UTCEPSS rescore
  13. 2026-08-19 06:54 UTCEG score recompute
  14. 2026-08-19 06:54 UTCVendor advisory
  15. 2026-08-19 06:54 UTCGHSA enrichment
  16. 2026-08-18 13:48 UTCEPSS rescore
  17. 2026-08-18 07:15 UTCEG score recompute
  18. 2026-08-18 07:15 UTCGHSA enrichment
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 08:09 UTCEG score recompute
  21. 2026-08-17 08:09 UTCVendor advisory
  22. 2026-08-17 08:09 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 09:26 UTCEG score recompute
  25. 2026-08-16 09:26 UTCVendor advisory
  26. 2026-08-16 09:26 UTCGHSA enrichment
  27. 2026-08-16 02:14 UTCEPSS rescore
  28. 2026-08-15 10:43 UTCEG score recompute
  29. 2026-08-15 10:43 UTCVendor advisory
  30. 2026-08-15 10:43 UTCGHSA enrichment
  31. 2026-08-15 01:30 UTCEPSS rescore
  32. 2026-08-14 12:00 UTCEG score recompute
  33. 2026-08-14 12:00 UTCVendor advisory
  34. 2026-08-14 12:00 UTCGHSA enrichment
  35. 2026-08-13 22:00 UTCEPSS rescore
  36. 2026-08-13 13:16 UTCVendor advisory
  37. 2026-08-13 13:16 UTCGHSA enrichment
  38. 2026-08-12 14:33 UTCEG score recompute
  39. 2026-08-12 14:33 UTCVendor advisory
  40. 2026-08-12 14:33 UTCGHSA enrichment
  41. 2026-08-12 13:51 UTCEPSS rescore
  42. 2026-08-11 15:46 UTCEG score recompute
  43. 2026-08-11 15:46 UTCVendor advisory
  44. 2026-08-11 15:46 UTCGHSA enrichment
  45. 2026-08-11 00:00 UTCEPSS rescore
  46. 2026-08-10 17:03 UTCGHSA enrichment
  47. 2026-08-09 18:20 UTCEG score recompute
  48. 2026-08-09 18:20 UTCVendor advisory
  49. 2026-08-09 18:20 UTCGHSA enrichment
  50. 2026-08-09 13:46 UTCEPSS rescore
  51. 2026-08-08 19:37 UTCEG score recompute
  52. 2026-08-08 19:37 UTCVendor advisory
  53. 2026-08-08 19:37 UTCGHSA enrichment
  54. 2026-08-08 16:37 UTCEPSS rescore
  55. 2026-08-07 20:54 UTCVendor advisory
  56. 2026-08-07 20:54 UTCGHSA enrichment
  57. 2026-08-06 22:10 UTCEG score recompute
  58. 2026-08-06 22:10 UTCVendor advisory
  59. 2026-08-06 22:10 UTCGHSA enrichment
  60. 2026-08-06 13:47 UTCEPSS rescore
  61. 2026-08-05 23:27 UTCEG score recompute
  62. 2026-08-05 23:27 UTCVendor advisory
  63. 2026-08-05 23:27 UTCGHSA enrichment
  64. 2026-08-05 19:17 UTCEPSS rescore
  65. 2026-08-05 00:44 UTCVendor advisory
  66. 2026-08-05 00:44 UTCGHSA enrichment
  67. 2026-08-04 01:58 UTCEG score recompute
  68. 2026-08-04 01:58 UTCVendor advisory
  69. 2026-08-04 01:58 UTCGHSA enrichment
  70. 2026-08-03 10:36 UTCEPSS rescore
  71. 2026-08-03 03:15 UTCVendor advisory
  72. 2026-08-03 03:15 UTCGHSA enrichment
  73. 2026-08-02 04:31 UTCEG score recompute
  74. 2026-08-02 04:31 UTCVendor advisory
  75. 2026-08-02 04:31 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-56288?
CVE-2026-56288 is a medium vulnerability published on July 9, 2026. GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer…
When was CVE-2026-56288 disclosed?
CVE-2026-56288 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56288 actively exploited?
CVE-2026-56288 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.7% of all scored CVEs.
What is the CVSS score of CVE-2026-56288?
CVE-2026-56288 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-56288?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56288, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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