CVE-2026-53370

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-19. 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:

perf/x86/intel: Improve validation and configuration of ACR masks

Currently there are several issues on the user space ACR mask validation and configuration.

  • The validation for user space ACR mask (attr.config2) is incomplete,
e.g., the ACR mask could include the index which belongs to another ACR events group, but it's not validated.
  • An early return on an invalid ACR mask caused all subsequent ACR groups
to be skipped.
  • The stale hardware ACR mask (hw.config1) is not cleared before setting
new hardware ACR mask.

The following changes address all of the above issues.

  • Figure out the event index group of an ACR group. Any bits in the
user-space mask not present in the index group are now dropped.
  • Instead of an early return on invalid bits, drop only the invalid
portions and continue iterating through all ACR events to ensure full configuration.
  • Explicitly clear the stale hardware ACR mask for each event prior to
writing the new configuration.

Besides, a non-leader event member of ACR group could be disabled in theory. This could cause bit-shifting errors in the acr_mask of remaining group members. But since ACR sampling requires all events to be active, this should not be a big concern in real use case. Add a "FIXME" comment to notice this risk.

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

July 19, 2026

Last Modified

July 29, 2026

Advisory Details (3)

Auto-updated Jul 29, 2026
No patch confirmed yet.
generic

perf/x86/intel: Improve validation and configuration of ACR masks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c05e01cef47d9b4969eae2dcf9467e2a555bcb4f
generic

perf/x86/intel: Improve validation and configuration of ACR masks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aab56b95bee3ff79176b13443cd9d7cfe9747df0
generic

perf/x86/intel: Improve validation and configuration of ACR masks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5ad732a56be46aabf158c16aa0c095291727aaef

Vendor Advisories for CVE-2026-53370(1)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (133 versions)7.0.7-1—

All Vendor Advisories

(5)

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 23× in last 7d / 113× 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 138 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53370?
CVE-2026-53370 is a medium vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Improve validation and configuration of ACR masks Currently there are several issues on the user space ACR mask validation and configuration. The validation for user space ACR mask (attr.config2) is incomplete,…
When was CVE-2026-53370 disclosed?
CVE-2026-53370 was first published in the National Vulnerability Database on July 19, 2026, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53370 actively exploited?
CVE-2026-53370 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-2026-53370?
CVE-2026-53370 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53370?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53370, 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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