CVE-2026-53021

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
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.

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

scsi: target: core: Fix integer overflow in UNMAP bounds check

sbc_execute_unmap() checks LBA + range does not exceed the device capacity, but does not guard against LBA + range wrapping around on 64-bit overflow.

Add an overflow check matching the pattern already used for WRITE_SAME in the same file.

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 (8)

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

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d7aef29573c7c5cdb2dfad939253287a6329c2a4
generic

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c08ab702c4699c6efb9d60bdb15b73e7a627ee7e
generic

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5efc3ef4758f8d98c257419fa21daca3227de61a
generic

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/51075df70c46e60a9773f2dcd28299e40dac36fb
generic

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3facdecc3fcf115cc4f9b3d8f118d6705e2456a8
generic

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2e1ed9a7b6ea5bfefb5d80a02b1c71c7dee1f0dd
generic

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2bf2d65f76697820dbc4227d13866293576dd90a
generic

scsi: target: core: Fix integer overflow in UNMAP bounds check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/02115986d027ade793e7f6be87e91d6a796d0aa3

Vendor Advisories for CVE-2026-53021(2)

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

Patch Availability(26)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-07-29ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-07-29ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-07-29ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-07-29ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-07-29ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-07-29ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-07-29ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-07-29ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-07-29ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-07-29ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-07-29ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-07-29ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-07-29ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-07-29ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-07-29ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-07-29ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-07-29ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1059.62~22.04.1) @ jammy2026-07-29ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-07-29ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-07-29ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-07-29ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-07-29ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-07-29ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-07-29ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-07-29ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-07-29ubuntu

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

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 16× in last 7d / 61× 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.

  1. 2026-07-29 00:55 UTCEG score recompute
  2. 2026-07-29 00:55 UTCVendor advisory
  3. 2026-07-29 00:54 UTCGHSA enrichment
  4. 2026-07-28 15:37 UTCEPSS rescore
  5. 2026-07-27 17:38 UTCEG score recompute
  6. 2026-07-27 17:38 UTCVendor advisory
  7. 2026-07-27 17:38 UTCGHSA enrichment
  8. 2026-07-26 15:34 UTCEG score recompute
  9. 2026-07-26 15:34 UTCVendor advisory
  10. 2026-07-26 15:34 UTCGHSA enrichment
  11. 2026-07-26 14:54 UTCEPSS rescore
  12. 2026-07-25 14:18 UTCEPSS rescore
  13. 2026-07-24 14:18 UTCEPSS rescore
  14. 2026-07-23 14:18 UTCEPSS rescore
  15. 2026-07-23 03:19 UTCEG score recompute
  16. 2026-07-22 14:08 UTCEPSS rescore
  17. 2026-07-21 15:25 UTCEPSS rescore
  18. 2026-07-20 17:08 UTCEPSS rescore
  19. 2026-07-19 14:31 UTCEPSS rescore
  20. 2026-07-19 14:31 UTCEPSS rescore
  21. 2026-07-19 02:29 UTCEPSS rescore
  22. 2026-07-18 10:04 UTCEPSS rescore
  23. 2026-07-16 17:46 UTCEG score recompute▲ 5.50
  24. 2026-07-16 17:46 UTCVendor advisory
  25. 2026-07-16 17:46 UTCGHSA enrichment
Show 44 more
  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 14:22 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-13 23:44 UTCGHSA enrichment
  8. 2026-07-13 22:31 UTCEPSS rescore
  9. 2026-07-13 06:13 UTCEPSS rescore
  10. 2026-07-13 06:13 UTCEPSS rescore
  11. 2026-07-12 05:46 UTCEPSS rescore
  12. 2026-07-11 08:27 UTCEPSS rescore
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-11 05:54 UTCVendor advisory
  15. 2026-07-11 05:54 UTCGHSA enrichment
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-08 15:16 UTCEPSS rescore
  19. 2026-07-08 15:16 UTCEPSS rescore
  20. 2026-07-08 12:04 UTCGHSA enrichment
  21. 2026-07-07 13:46 UTCEPSS rescore
  22. 2026-07-07 13:46 UTCEPSS rescore
  23. 2026-07-06 16:27 UTCEPSS rescore
  24. 2026-07-06 16:27 UTCEPSS rescore
  25. 2026-07-06 02:23 UTCEPSS rescore
  26. 2026-07-06 02:23 UTCEPSS rescore
  27. 2026-07-05 17:41 UTCGHSA enrichment
  28. 2026-07-05 02:31 UTCEPSS rescore
  29. 2026-07-05 02:30 UTCEPSS rescore
  30. 2026-07-04 06:31 UTCEPSS rescore
  31. 2026-07-02 23:51 UTCGHSA enrichment
  32. 2026-07-01 15:07 UTCEPSS rescore
  33. 2026-06-30 23:22 UTCEPSS rescore
  34. 2026-06-30 06:01 UTCGHSA enrichment
  35. 2026-06-29 14:06 UTCEPSS rescore
  36. 2026-06-29 14:06 UTCEPSS rescore
  37. 2026-06-28 14:07 UTCEPSS rescore
  38. 2026-06-28 04:56 UTCEPSS rescore
  39. 2026-06-28 04:56 UTCEPSS rescore
  40. 2026-06-27 12:11 UTCGHSA enrichment
  41. 2026-06-27 03:08 UTCEPSS rescore
  42. 2026-06-25 13:49 UTCEPSS rescore
  43. 2026-06-24 18:21 UTCEG score recompute
  44. 2026-06-24 18:02 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-53021?
CVE-2026-53021 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: scsi: target: core: Fix integer overflow in UNMAP bounds check sbcexecuteunmap() checks LBA + range does not exceed the device capacity, but does not guard against LBA + range wrapping around on 64-bit overflow. Add an overflow…
When was CVE-2026-53021 disclosed?
CVE-2026-53021 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-2026-53021 actively exploited?
CVE-2026-53021 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 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-53021?
CVE-2026-53021 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53021, 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

Explore the affected products and dependency analysis for CVE-2026-53021

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