CVE-2026-63837

UNRATEDCVSS · not yet scoredTrending — 5 sources updated this week

Also known asEUVD-2026-45521 (ENISA EUVD) · GHSA-g7h6-fhch-mvgh (GitHub Security Advisories)Source: ENISA EUVD

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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

net: ena: PHC: Check return code before setting timestamp output

ena_phc_gettimex64() is setting the output parameter regardless of whether ena_com_phc_get_timestamp() succeeded or failed.

When ena_com_phc_get_timestamp() returns an error, the timestamp parameter may contain uninitialized stack memory (e.g., when PHC is disabled or in blocked state) or invalid hardware values. Passing these to userspace via the PTP ioctl is both a security issue (information leak) and a correctness bug.

Fix by checking the return code after releasing the lock and only setting the output timestamp on success.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

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

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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
No SSVC decision: EchelonGraph has not assessed this CVECISA 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 BOD 26-04 block below.

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

July 19, 2026

Last Modified

July 27, 2026

Vendor Advisories for CVE-2026-63837(1)

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

Patch Availability(9)

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

(1 across 1 ecosystem)
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
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All Vendor Advisories

(8)

Data Freshness Timeline

(refreshed 12× in last 7d / 43× 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 143 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 43 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 17:11 UTCEG score recompute
  2. 2026-10-29 17:11 UTCVendor advisory
  3. 2026-10-29 17:11 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-25 14:13 UTCEG score recompute
  10. 2026-10-25 00:55 UTCOSV refresh
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  18. 2026-10-18 03:23 UTCEG score recompute
  19. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-10-12 15:48 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:33 UTCEG score recompute
  2. 2026-10-11 16:48 UTCEG score recompute
  3. 2026-10-11 14:09 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  15. 2026-10-01 09:08 UTCEG score recompute
  16. 2026-10-01 09:08 UTCVendor advisory
  17. 2026-10-01 09:08 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  19. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-09-28 07:39 UTCVendor advisory
  21. 2026-09-28 07:39 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  22. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  24. 2026-09-23 02:13 UTCVendor advisory
  25. 2026-09-23 02:13 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  26. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  27. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  28. 2026-09-17 10:05 UTCVendor advisory
  29. 2026-09-17 10:05 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  30. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  31. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  32. 2026-09-11 20:31 UTCVendor advisory
  33. 2026-09-11 20:31 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  34. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  35. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  36. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  37. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  38. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  39. 2026-09-05 20:14 UTCVendor advisory
  40. 2026-09-05 20:14 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  41. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  42. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  43. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  44. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  45. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  46. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  47. 2026-08-30 03:02 UTCVendor advisory
  48. 2026-08-30 03:02 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  49. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  50. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  51. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  52. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  53. 2026-08-26 04:33 UTCVendor advisory
  54. 2026-08-26 04:32 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  55. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  56. 2026-08-23 05:36 UTCVendor advisory
  57. 2026-08-23 05:35 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  58. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  59. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  60. 2026-08-20 07:08 UTCVendor advisory
  61. 2026-08-20 07:08 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  62. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  63. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  64. 2026-08-17 08:41 UTCVendor advisory
  65. 2026-08-17 08:41 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  66. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  67. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  68. 2026-08-14 10:14 UTCVendor advisory
  69. 2026-08-14 10:14 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  70. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  71. 2026-08-11 11:48 UTCVendor advisory
  72. 2026-08-11 11:48 UTCGHSA enrichmentGHSA-g7h6-fhch-mvgh
  73. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  74. 2026-08-09 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  75. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 6th percentile

Frequently asked(4)

What is CVE-2026-63837?
CVE-2026-63837 is a vulnerability whose severity is not yet rated; its CVE record was published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: net: ena: PHC: Check return code before setting timestamp output enaphcgettimex64() is setting the output parameter regardless of whether enacomphcgettimestamp() succeeded or failed. When enacomphcgettimestamp() returns an error,…
When was the CVE record for CVE-2026-63837 published?
The CVE record for CVE-2026-63837 was published on July 19, 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 July 27, 2026; the record at its source may have been updated since.
Is CVE-2026-63837 actively exploited?
CVE-2026-63837 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-63837?
A fix for CVE-2026-63837 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-63837 are linked in the Vendor Advisories panel on this page.

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