CVE-2026-52933

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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

io_uring/poll: fix signed comparison in io_poll_get_ownership()

io_poll_get_ownership() uses a signed comparison to check whether poll_refs has reached the threshold for the slowpath:

if (unlikely(atomic_read(&req->poll_refs) >= IO_POLL_REF_BIAS))

atomic_read() returns int (signed). When IO_POLL_CANCEL_FLAG (BIT(31)) is set in poll_refs, the value becomes negative in signed arithmetic, so the >= 128 comparison always evaluates to false and the slowpath is never taken.

Fix this by casting the atomic_read() result to unsigned int before the comparison, so that the cancel flag is treated as a large positive value and correctly triggers the slowpath.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
2.2%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 8, 2026

Advisory Details (6)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

io_uring/poll: fix signed comparison in io_poll_get_ownership() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18
generic

io_uring/poll: fix signed comparison in io_poll_get_ownership() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5
generic

io_uring/poll: fix signed comparison in io_poll_get_ownership() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763
generic

io_uring/poll: fix signed comparison in io_poll_get_ownership() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae
generic

io_uring/poll: fix signed comparison in io_poll_get_ownership() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3
generic

io_uring/poll: fix signed comparison in io_poll_get_ownership() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42

Vendor Advisories for CVE-2026-52933(2)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-07-16ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-07-16ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-07-16ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-07-16ubuntu

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

(4)

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 10× in last 7d / 95× 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. 2026-07-24 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:19 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:25 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 14:31 UTCEPSS rescore
  9. 2026-07-19 02:29 UTCEPSS rescore
  10. 2026-07-18 10:04 UTCEPSS rescore
  11. 2026-07-16 17:49 UTCVendor advisory
  12. 2026-07-16 17:49 UTCGHSA enrichment
  13. 2026-07-16 17:03 UTCEPSS rescore
  14. 2026-07-16 03:26 UTCVendor advisory
  15. 2026-07-16 03:26 UTCGHSA enrichment
  16. 2026-07-15 16:57 UTCEPSS rescore
  17. 2026-07-15 16:57 UTCEPSS rescore
  18. 2026-07-15 14:24 UTCVendor advisory
  19. 2026-07-15 14:24 UTCGHSA enrichment
  20. 2026-07-15 01:17 UTCVendor advisory
  21. 2026-07-15 01:17 UTCGHSA enrichment
  22. 2026-07-14 12:18 UTCVendor advisory
  23. 2026-07-14 12:18 UTCGHSA enrichment
  24. 2026-07-13 23:20 UTCVendor advisory
  25. 2026-07-13 23:19 UTCGHSA enrichment
Show 73 more
  1. 2026-07-13 22:31 UTCEPSS rescore
  2. 2026-07-13 10:20 UTCVendor advisory
  3. 2026-07-13 10:20 UTCGHSA enrichment
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-13 06:13 UTCEPSS rescore
  6. 2026-07-12 21:21 UTCVendor advisory
  7. 2026-07-12 21:21 UTCGHSA enrichment
  8. 2026-07-12 08:21 UTCVendor advisory
  9. 2026-07-12 08:21 UTCGHSA enrichment
  10. 2026-07-12 05:46 UTCEPSS rescore
  11. 2026-07-11 19:22 UTCVendor advisory
  12. 2026-07-11 19:22 UTCGHSA enrichment
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-11 06:23 UTCVendor advisory
  16. 2026-07-11 06:23 UTCGHSA enrichment
  17. 2026-07-10 17:15 UTCVendor advisory
  18. 2026-07-10 17:15 UTCGHSA enrichment
  19. 2026-07-10 04:16 UTCGHSA enrichment
  20. 2026-07-09 19:10 UTCEPSS rescore
  21. 2026-07-09 19:10 UTCEPSS rescore
  22. 2026-07-09 15:15 UTCVendor advisory
  23. 2026-07-09 15:14 UTCGHSA enrichment
  24. 2026-07-09 02:04 UTCGHSA enrichment
  25. 2026-07-08 15:16 UTCEPSS rescore
  26. 2026-07-08 15:16 UTCEPSS rescore
  27. 2026-07-08 13:02 UTCVendor advisory
  28. 2026-07-08 13:02 UTCGHSA enrichment
  29. 2026-07-08 00:01 UTCVendor advisory
  30. 2026-07-08 00:01 UTCGHSA enrichment
  31. 2026-07-07 13:46 UTCEPSS rescore
  32. 2026-07-07 13:46 UTCEPSS rescore
  33. 2026-07-07 11:02 UTCVendor advisory
  34. 2026-07-07 11:02 UTCGHSA enrichment
  35. 2026-07-06 21:10 UTCGHSA enrichment
  36. 2026-07-06 16:27 UTCEPSS rescore
  37. 2026-07-06 16:27 UTCEPSS rescore
  38. 2026-07-06 08:10 UTCVendor advisory
  39. 2026-07-06 08:10 UTCGHSA enrichment
  40. 2026-07-05 19:09 UTCVendor advisory
  41. 2026-07-05 19:09 UTCGHSA enrichment
  42. 2026-07-05 06:11 UTCVendor advisory
  43. 2026-07-05 06:11 UTCGHSA enrichment
  44. 2026-07-04 17:11 UTCVendor advisory
  45. 2026-07-04 17:11 UTCGHSA enrichment
  46. 2026-07-04 04:12 UTCVendor advisory
  47. 2026-07-04 04:12 UTCGHSA enrichment
  48. 2026-07-03 15:07 UTCGHSA enrichment
  49. 2026-07-03 02:07 UTCVendor advisory
  50. 2026-07-03 02:06 UTCGHSA enrichment
  51. 2026-07-02 13:08 UTCVendor advisory
  52. 2026-07-02 13:08 UTCGHSA enrichment
  53. 2026-07-02 00:07 UTCVendor advisory
  54. 2026-07-02 00:06 UTCGHSA enrichment
  55. 2026-07-01 15:07 UTCEPSS rescore
  56. 2026-07-01 11:07 UTCGHSA enrichment
  57. 2026-06-30 23:22 UTCEPSS rescore
  58. 2026-06-30 22:08 UTCGHSA enrichment
  59. 2026-06-30 09:09 UTCGHSA enrichment
  60. 2026-06-29 20:10 UTCEG score recompute▲ 7.80
  61. 2026-06-29 20:10 UTCGHSA enrichment
  62. 2026-06-29 14:06 UTCEPSS rescore
  63. 2026-06-29 14:06 UTCEPSS rescore
  64. 2026-06-28 14:07 UTCEPSS rescore
  65. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  66. 2026-06-28 04:56 UTCEPSS rescore
  67. 2026-06-28 04:56 UTCEPSS rescore
  68. 2026-06-27 03:08 UTCEPSS rescore
  69. 2026-06-27 02:25 UTCGHSA enrichment
  70. 2026-06-25 13:49 UTCEPSS rescore
  71. 2026-06-24 14:05 UTCEPSS rescore
  72. 2026-06-24 08:41 UTCEG score recompute
  73. 2026-06-24 08:40 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-52933?
CVE-2026-52933 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: iouring/poll: fix signed comparison in iopollgetownership() iopollget_ownership() uses a signed comparison to check whether poll_refs has reached the threshold for the slowpath: if (unlikely(atomicread(&req->pollrefs) >=…
When was CVE-2026-52933 disclosed?
CVE-2026-52933 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52933 actively exploited?
CVE-2026-52933 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52933?
CVE-2026-52933 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-52933?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52933, 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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