CVE-2026-53108

MEDIUMNVD 4.74.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 4.7 from GitHub Security Advisory published 2026-06-24. NVD baseline CVSS 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-38976 (ENISA EUVD) · GHSA-2377-3vvp-rhhq (GitHub Security Advisories)Source: ENISA EUVD

4.7EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: <0.1%CVSS: 4.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

powerpc/64s: Fix unmap race with PMD migration entries

The following race is possible with migration swap entries or device-private THP entries. e.g. when move_pages is called on a PMD THP page, then there maybe an intermediate state, where PMD entry acts as a migration swap entry (pmd_present() is true). Then if an munmap happens at the same time, then this VM_BUG_ON() can happen in pmdp_huge_get_and_clear_full().

This patch fixes that.

Thread A: move_pages() syscall add_folio_for_migration() mmap_read_lock(mm) folio_isolate_lru(folio) mmap_read_unlock(mm)

do_move_pages_to_node() migrate_pages() try_to_migrate_one() spin_lock(ptl) set_pmd_migration_entry() pmdp_invalidate() # PMD: _PAGE_INVALID | _PAGE_PTE | pfn set_pmd_at() # PMD: migration swap entry (pmd_present=0) spin_unlock(ptl) [page copy phase] # <--- RACE WINDOW -->

Thread B: munmap() mmap_write_downgrade(mm) unmap_vmas() -> zap_pmd_range() zap_huge_pmd() __pmd_trans_huge_lock() pmd_is_huge(): # !pmd_present && !pmd_none -> TRUE (swap entry) pmd_lock() -> # spin_lock(ptl), waits for Thread A to release ptl pmdp_huge_get_and_clear_full() VM_BUG_ON(!pmd_present(*pmdp)) # HITS!

[ 287.738700][ T1867] ------------[ cut here ]------------ [ 287.743843][ T1867] kernel BUG at arch/powerpc/mm/book3s64/pgtable.c:187! cpu 0x0: Vector: 700 (Program Check) at [c00000044037f4f0] pc: c000000000094ca4: pmdp_huge_get_and_clear_full+0x6c/0x23c lr: c000000000645dec: zap_huge_pmd+0xb0/0x868 sp: c00000044037f790 msr: 800000000282b033 current = 0xc0000004032c1a00 paca = 0xc000000004fe0000 irqmask: 0x03 irq_happened: 0x09 pid = 1867, comm = a.out kernel BUG at :187! Linux version 6.19.0-12136-g14360d4f917c-dirty (powerpc64le-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #27 SMP PREEMPT Sun Feb 22 10:38:56 IST 2026 enter ? for help [link register ] c000000000645dec zap_huge_pmd+0xb0/0x868 [c00000044037f790] c00000044037f7d0 (unreliable) [c00000044037f7d0] c000000000645dcc zap_huge_pmd+0x90/0x868 [c00000044037f840] c0000000005724cc unmap_page_range+0x176c/0x1f40 [c00000044037fa00] c000000000572ea0 unmap_vmas+0xb0/0x1d8 [c00000044037fa90] c0000000005af254 unmap_region+0xb4/0x128 [c00000044037fb50] c0000000005af400 vms_complete_munmap_vmas+0x138/0x310 [c00000044037fbe0] c0000000005b0f1c do_vmi_align_munmap+0x1ec/0x238 [c00000044037fd30] c0000000005b3688 __vm_munmap+0x170/0x1f8 [c00000044037fdf0] c000000000587f74 sys_munmap+0x2c/0x40 [c00000044037fe10] c000000000032668 system_call_exception+0x128/0x350 [c00000044037fe50] c00000000000d05c system_call_vectored_common+0x15c/0x2ec ---- Exception: 3000 (System Call Vectored) at 0000000010064a2c SP (7fff9b1ee9c0) is in userspace 0:mon> zh

commit a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages"), enabled migration for device-private PMD entries. Hence this is one other path where this warning could get trigger from.

------------[ cut here ]------------ WARNING: arch/powerpc/mm/book3s64/hash_pgtable.c:199 at hash__pmd_hugepage_update+0x48/0x284, CPU#3: hmm-tests/1905 Modules linked in: test_hmm CPU: 3 UID: 0 PID: 1905 Comm: hmm-tests Tainted: G B W L N 7.0.0-rc1-01438-g7e2f0ee7581c #21 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP, [N]=TEST Hardware name: IBM pSeries (emulated by qemu) POWER10 (architected) 0x801200 0xf000006 of:SLOF,git-ee03ae pSeries NIP [c000000000096b70] hash__pmd_hugepage_update+0x48/0x284 LR [c000000000096e7c] hash__pmdp_huge_get_and_clear+0xd0/0xd4 Call Trace: [c000000604707670] [c000000004e102b8] 0xc000000004e102b8 (unreliable) [c000000604707700] [c00000000064ec3c] set_pmd_migration_entry+0x414/0x498 [c000000604707760] [c00000000063e5a4] migrate_vma_col ---truncated---

CVSS v3
4.7
EG Score
4.7MEDIUMmedium confidence
EG Risk
21
EG Risk 21/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity47% × 45%
Impact severity (EG Severity): CVSS 4.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
<0.1%
EPSS %ILE
below the 1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.7): severity, escalated by confirmed exploitation. This CVE's 4.7 is its impact severity (EG Severity), not escalated.

EG Severity
4.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
<0.1% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 24, 2026

Last Modified

October 21, 2026

Advisory Details (2)

Auto-updated Jul 24, 2026
Patch available.
Web page

powerpc/64s: Fix unmap race with PMD migration entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bbcbf045d6c778e82b47a35fc8728387708e9a3d
Web page

powerpc/64s: Fix unmap race with PMD migration entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/829367e55012c053738ebe7db20c4a90d6609ece

Vendor Advisories for CVE-2026-53108(2)

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

Patch Availability(12)

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 rangeFix by version rangeDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (358 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (181 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)
  • every version up to 7.0.10-1: fixed in 7.0.10-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(11)

Data Freshness Timeline

(refreshed 13× in last 7d / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 202 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 102 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  2. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-10-25 14:20 UTCEG score recompute
  5. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-10-21 13:52 UTCVendor advisory
  10. 2026-10-21 13:51 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  11. 2026-10-21 12:58 UTCEG score recompute
  12. 2026-10-21 12:58 UTCVendor advisory
  13. 2026-10-21 12:58 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  14. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-18 03:32 UTCEG score recompute
  17. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  20. 2026-10-15 11:26 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  21. 2026-10-15 10:32 UTCEG score recompute
  22. 2026-10-15 10:32 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  23. 2026-10-14 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  24. 2026-10-14 02:24 UTCOSV refresh
  25. 2026-10-13 16:34 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
Show 75 more
  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  2. 2026-10-12 15:58 UTCEG score recompute
  3. 2026-10-11 19:41 UTCEG score recompute
  4. 2026-10-11 16:55 UTCEG score recompute
  5. 2026-10-11 14:19 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  9. 2026-10-08 17:12 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  11. 2026-10-06 15:18 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  12. 2026-10-05 17:43 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  13. 2026-10-03 14:26 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  15. 2026-09-29 15:22 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  16. 2026-09-28 13:51 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  17. 2026-09-26 15:59 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  18. 2026-09-26 00:27 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  19. 2026-09-23 17:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  20. 2026-09-23 09:58 UTCEG score recompute
  21. 2026-09-23 09:58 UTCVendor advisory
  22. 2026-09-23 09:58 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  23. 2026-09-18 07:50 UTCEG score recompute
  24. 2026-09-18 07:50 UTCVendor advisory
  25. 2026-09-18 07:50 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  26. 2026-09-16 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  27. 2026-09-14 01:37 UTCEG score recompute
  28. 2026-09-14 01:37 UTCVendor advisory
  29. 2026-09-14 01:37 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  30. 2026-09-13 16:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  31. 2026-09-12 16:11 UTCEG score recompute
  32. 2026-09-12 16:11 UTCVendor advisory
  33. 2026-09-12 16:11 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  34. 2026-09-11 14:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  35. 2026-09-10 09:35 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  36. 2026-09-06 13:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  37. 2026-09-04 05:06 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  38. 2026-09-01 13:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  39. 2026-09-01 04:40 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  40. 2026-08-30 19:53 UTCEG score recompute
  41. 2026-08-30 19:53 UTCVendor advisory
  42. 2026-08-30 19:53 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  44. 2026-08-30 01:22 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  45. 2026-08-28 03:42 UTCEG score recompute
  46. 2026-08-28 03:42 UTCVendor advisory
  47. 2026-08-28 03:41 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  48. 2026-08-27 14:25 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  49. 2026-08-26 14:46 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  50. 2026-08-24 15:14 UTCEG score recompute
  51. 2026-08-24 15:14 UTCVendor advisory
  52. 2026-08-24 15:14 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  53. 2026-08-23 13:26 UTCVendor advisory
  54. 2026-08-23 13:26 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  55. 2026-08-22 11:31 UTCVendor advisory
  56. 2026-08-22 11:31 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  57. 2026-08-21 09:13 UTCVendor advisory
  58. 2026-08-21 09:13 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  59. 2026-08-20 07:19 UTCVendor advisory
  60. 2026-08-20 07:19 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  61. 2026-08-19 01:59 UTCEG score recompute
  62. 2026-08-19 01:59 UTCVendor advisory
  63. 2026-08-19 01:59 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  64. 2026-08-18 13:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  65. 2026-08-17 13:05 UTCVendor advisory
  66. 2026-08-17 13:05 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  67. 2026-08-16 11:19 UTCEG score recompute
  68. 2026-08-16 11:19 UTCVendor advisory
  69. 2026-08-16 11:19 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  70. 2026-08-16 02:14 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  71. 2026-08-15 09:33 UTCVendor advisory
  72. 2026-08-15 09:33 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  73. 2026-08-14 07:47 UTCVendor advisory
  74. 2026-08-14 07:47 UTCGHSA enrichmentGHSA-2377-3vvp-rhhq · GitHub CVSS 4.7
  75. 2026-08-13 06:01 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-53108?
CVE-2026-53108 is a medium-severity vulnerability; its CVE record was published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unmap race with PMD migration entries The following race is possible with migration swap entries or device-private THP entries. e.g. when move_pages is called on a PMD THP page, then there maybe an intermediate…
When was the CVE record for CVE-2026-53108 published?
The CVE record for CVE-2026-53108 was published on June 24, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 21, 2026; the record at its source may have been updated since.
Is CVE-2026-53108 actively exploited?
CVE-2026-53108 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a <0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53108?
CVE-2026-53108 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-53108?
A fix for CVE-2026-53108 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53108 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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