CVE-2026-53015

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-24. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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.

In the Linux kernel, the following vulnerability has been resolved:

erofs: unify lcn as u64 for 32-bit platforms

As sashiko reported [1], lcn was typed as unsigned long (or unsigned int sometimes), which is only 32 bits wide on 32-bit platforms, which causes (lcn << lclusterbits) to be truncated at 4 GiB.

In order to consolidate the logic, just use u64 consistently around the codebase.

[1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jul 15, 2026
No patch confirmed yet.
generic

erofs: unify lcn as u64 for 32-bit platforms - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5
generic

erofs: unify lcn as u64 for 32-bit platforms - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521
generic

erofs: unify lcn as u64 for 32-bit platforms - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253
generic

erofs: unify lcn as u64 for 32-bit platforms - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f

Vendor Advisories for CVE-2026-53015(2)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-30ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-30ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-30ubuntu

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
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (350 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

All Vendor Advisories

(22)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 60× 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 173 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53015?
CVE-2026-53015 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: erofs: unify lcn as u64 for 32-bit platforms As sashiko reported [1], lcn was typed as unsigned long (or unsigned int sometimes), which is only 32 bits wide on 32-bit platforms, which causes (lcn << lclusterbits) to be truncated at…
When was CVE-2026-53015 disclosed?
CVE-2026-53015 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53015 actively exploited?
CVE-2026-53015 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 97.8% of all scored CVEs.
What is the CVSS score of CVE-2026-53015?
CVE-2026-53015 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53015?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53015, 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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