CVE-2026-53342

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-01. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 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

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:

arm64: mm: call pagetable dtor when freeing hot-removed page tables

Since 5e8eb9aeeda3 ("arm64: mm: always call PTE/PMD ctor in __create_pgd_mapping()") page-table allocation on ARM64 always calls pagetable_{pte,pmd,pud,p4d}_ctor(). This sets the page_type to PGTY_table, increments NR_PAGETABLE and possible allocates a PTL. However the matching pagetable_dtor() calls were never added.

With DEBUG_VM enabled on kernel versions prior to v6.17 without 2dfcd1608f3a9 ("mm/page_alloc: let page freeing clear any set page type") this leads to the following warning when freeing these pages due to page->page_type sharing page->_mapcount:

BUG: Bad page state in process ... pfn:284fbb page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x284fbb flags: 0x17fffc000000000(node=0|zone=2|lastcpupid=0x1ffff) page_type: f2(table) page dumped because: nonzero mapcount Call trace: bad_page+0x13c/0x160 __free_frozen_pages+0x6cc/0x860 ___free_pages+0xf4/0x180 free_pages+0x54/0x80 free_hotplug_page_range.part.0+0x58/0x90 free_empty_tables+0x438/0x500 __remove_pgd_mapping.constprop.0+0x60/0xa8 arch_remove_memory+0x48/0x80 try_remove_memory+0x158/0x1d8 offline_and_remove_memory+0x138/0x180

It can also lead to leaking the ptl allocation if ALLOC_SPLIT_PTLOCKS is defined and incorrect NR_PAGETABLE stats. Fix this by calling pagetable_dtor() in free_hotplug_pgtable_page() prior to freeing the page to undo the effects of calling pagetable_*_ctor().

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
5%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jul 24, 2026
No patch confirmed yet.
generic

arm64: mm: call pagetable dtor when freeing hot-removed page tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c594b83457ccdee76d458416fb3bc9348a37592f
generic

arm64: mm: call pagetable dtor when freeing hot-removed page tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aaa688ac9f18207f7452c6472e647c1febaea6a3
generic

arm64: mm: call pagetable dtor when freeing hot-removed page tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/95f27fcda681021ed3906d3cae7e68b6a57a1d8e

Vendor Advisories for CVE-2026-53342(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (145 versions)7.0.13-1—

Data Freshness Timeline

(refreshed 7× in last 7d / 50× 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 406 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. 2026-09-06 02:31 UTCEG score recompute
  7. 2026-09-06 02:31 UTCGHSA enrichment
  8. 2026-09-04 05:06 UTCEPSS rescore
  9. 2026-09-02 14:12 UTCEPSS rescore
  10. 2026-09-01 13:54 UTCEPSS rescore
  11. 2026-09-01 04:40 UTCEPSS rescore
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 13:14 UTCEG score recompute
  14. 2026-08-30 13:14 UTCGHSA enrichment
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:41 UTCEPSS rescore
  17. 2026-08-27 22:28 UTCEG score recompute
  18. 2026-08-27 22:28 UTCGHSA enrichment
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 14:46 UTCEPSS rescore
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-25 02:01 UTCEG score recompute
  23. 2026-08-25 02:01 UTCGHSA enrichment
  24. 2026-08-24 04:11 UTCGHSA enrichment
  25. 2026-08-23 05:26 UTCEG score recompute
Show 75 more
  1. 2026-08-23 05:25 UTCGHSA enrichment
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-22 07:22 UTCGHSA enrichment
  4. 2026-08-21 04:34 UTCEG score recompute
  5. 2026-08-21 04:34 UTCGHSA enrichment
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-20 04:46 UTCGHSA enrichment
  8. 2026-08-18 21:00 UTCEG score recompute
  9. 2026-08-18 21:00 UTCGHSA enrichment
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-17 13:20 UTCGHSA enrichment
  13. 2026-08-16 15:31 UTCEG score recompute
  14. 2026-08-16 15:31 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 17:42 UTCEG score recompute
  18. 2026-08-15 17:42 UTCGHSA enrichment
  19. 2026-08-15 01:30 UTCEPSS rescore
  20. 2026-08-14 19:52 UTCGHSA enrichment
  21. 2026-08-13 22:02 UTCEG score recompute
  22. 2026-08-13 22:02 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-13 00:13 UTCEG score recompute
  25. 2026-08-13 00:13 UTCGHSA enrichment
  26. 2026-08-12 13:51 UTCEPSS rescore
  27. 2026-08-12 02:24 UTCGHSA enrichment
  28. 2026-08-11 04:33 UTCEG score recompute
  29. 2026-08-11 04:33 UTCGHSA enrichment
  30. 2026-08-11 00:00 UTCEPSS rescore
  31. 2026-08-10 06:43 UTCEG score recompute
  32. 2026-08-10 06:43 UTCGHSA enrichment
  33. 2026-08-09 13:46 UTCEPSS rescore
  34. 2026-08-09 08:54 UTCEG score recompute
  35. 2026-08-09 08:54 UTCGHSA enrichment
  36. 2026-08-08 16:37 UTCEPSS rescore
  37. 2026-08-08 11:05 UTCGHSA enrichment
  38. 2026-08-07 13:15 UTCGHSA enrichment
  39. 2026-08-06 15:26 UTCEG score recompute
  40. 2026-08-06 15:26 UTCGHSA enrichment
  41. 2026-08-06 13:47 UTCEPSS rescore
  42. 2026-08-05 19:17 UTCEPSS rescore
  43. 2026-08-05 17:33 UTCGHSA enrichment
  44. 2026-08-04 19:40 UTCEG score recompute
  45. 2026-08-04 19:40 UTCGHSA enrichment
  46. 2026-08-04 15:10 UTCEPSS rescore
  47. 2026-08-04 10:39 UTCEPSS rescore
  48. 2026-08-03 21:51 UTCEG score recompute
  49. 2026-08-03 21:51 UTCGHSA enrichment
  50. 2026-08-03 10:36 UTCEPSS rescore
  51. 2026-08-03 00:02 UTCGHSA enrichment
  52. 2026-08-02 02:12 UTCGHSA enrichment
  53. 2026-08-01 04:23 UTCEG score recompute
  54. 2026-08-01 04:23 UTCGHSA enrichment
  55. 2026-08-01 04:16 UTCEPSS rescore
  56. 2026-07-31 06:33 UTCEG score recompute
  57. 2026-07-31 06:33 UTCGHSA enrichment
  58. 2026-07-30 16:28 UTCEPSS rescore
  59. 2026-07-30 08:39 UTCEG score recompute
  60. 2026-07-30 08:39 UTCGHSA enrichment
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-29 08:34 UTCEG score recompute
  63. 2026-07-29 08:34 UTCGHSA enrichment
  64. 2026-07-28 15:37 UTCEPSS rescore
  65. 2026-07-28 09:09 UTCEG score recompute
  66. 2026-07-28 09:09 UTCGHSA enrichment
  67. 2026-07-27 11:10 UTCEG score recompute
  68. 2026-07-27 11:10 UTCGHSA enrichment
  69. 2026-07-26 14:54 UTCEPSS rescore
  70. 2026-07-26 13:21 UTCEG score recompute
  71. 2026-07-26 13:21 UTCGHSA enrichment
  72. 2026-07-24 14:18 UTCEPSS rescore
  73. 2026-07-23 22:13 UTCEG score recompute▲ 5.50
  74. 2026-07-23 22:13 UTCGHSA enrichment
  75. 2026-07-23 22:11 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM

Frequently asked(5)

What is CVE-2026-53342?
CVE-2026-53342 is a medium vulnerability published on July 1, 2026. In the Linux kernel, the following vulnerability has been resolved: arm64: mm: call pagetable dtor when freeing hot-removed page tables Since 5e8eb9aeeda3 ("arm64: mm: always call PTE/PMD ctor in createpgdmapping()") page-table allocation on ARM64 always calls pagetable{pte,pmd,pud,p4d}ctor(). This…
When was CVE-2026-53342 disclosed?
CVE-2026-53342 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53342 actively exploited?
CVE-2026-53342 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 94.5% of all scored CVEs.
What is the CVSS score of CVE-2026-53342?
CVE-2026-53342 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53342?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53342, 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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