CVE-2026-52933

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 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(medium)
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 PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

June 24, 2026

Last Modified

August 5, 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(20)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-24ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-24ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-24ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-24ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-24ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-24ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-24ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-24ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-24ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-24ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-24ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-24ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-24ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-24ubuntu

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
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.86-1~bpo12+1 (19 versions)6.12.86-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.4-1~bpo13+1 (131 versions)7.0.4-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(20)

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 28× in last 7d / 146× 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 253 total refreshes for this CVE.

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

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 August 5, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 97.9% of all scored CVEs.
What is the CVSS score of CVE-2026-52933?
CVE-2026-52933 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-52933

Explore →

Is Your Infrastructure Affected by CVE-2026-52933?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs