CVE-2026-52933

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM 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
Trending — Patch released 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

September 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(7)

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

Patch Availability(25)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-18ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-18ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-18ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-09-18ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1059.62~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-09-18ubuntu
redhatkernel-0:5.14.0-427.150.1.el9_42026-09-16redhat
redhatkernel-0:6.12.0-55.104.1.el10_02026-09-14redhat
redhatkernel-0:5.14.0-570.140.1.el9_62026-09-09redhat
redhatkernel-0:6.12.0-211.52.1.el10_22026-09-08redhat
redhatkernel-0:5.14.0-687.45.1.el9_82026-09-08redhat

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 (134 versions)7.0.4-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(19)

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 13× in last 7d / 59× 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 287 total refreshes for this CVE.

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

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 September 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 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 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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