CVE-2026-53210

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

tee: shm: fix shm leak in register_shm_helper()

register_shm_helper() allocates shm before calling iov_iter_npages(). If iov_iter_npages() returns 0, the function jumps to err_ctx_put and leaks shm.

This can be triggered by TEE_IOC_SHM_REGISTER with struct tee_ioctl_shm_register_data where length is 0.

Jump to err_free_shm instead.

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
6%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 2, 2026

Advisory Details (4)

Auto-updated Jul 3, 2026
No patch confirmed yet.
generic

tee: shm: fix shm leak in register_shm_helper() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dbf779db927414f5b37c1f666013e9b48a88cfde
generic

tee: shm: fix shm leak in register_shm_helper() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c10c9c48b2903f41ed4c532043b0576e86228236
generic

tee: shm: fix shm leak in register_shm_helper() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4277759906b44d923a38c8f59f5576501b187b0d
generic

tee: shm: fix shm leak in register_shm_helper() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/26682f5efc276e3ad96d102019472bfbf03833b2

Vendor Advisories for CVE-2026-53210(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (145 versions)7.0.13-1

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 48× 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 159 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53210?
CVE-2026-53210 is a medium vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: tee: shm: fix shm leak in registershmhelper() registershmhelper() allocates shm before calling ioviternpages(). If ioviternpages() returns 0, the function jumps to errctxput and leaks shm. This can be triggered by…
When was CVE-2026-53210 disclosed?
CVE-2026-53210 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53210 actively exploited?
CVE-2026-53210 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 94.3% of all scored CVEs.
What is the CVSS score of CVE-2026-53210?
CVE-2026-53210 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53210?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53210, 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-2026-53210

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