CVE-2026-64234

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory published 2026-07-24. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
5.5EG
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: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

tty: serial: pch_uart: add check for dma_alloc_coherent()

Add a check for dma_alloc_coherent() failure to prevent a potential NULL pointer dereference in dma_handle_rx(). Properly release DMA channels and the PCI device reference using a goto ladder if the allocation fails.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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 (value × EchelonGraph’s weight)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation0.2% × 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
0.2%
EPSS %ILE
5th
KEV
Not listed

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

July 24, 2026

Last Modified

August 12, 2026

Advisory Details (8)

Auto-updated Aug 12, 2026
Patch available.
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59
Web page

tty: serial: pch_uart: add check for dma_alloc_coherent() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf

Vendor Advisories for CVE-2026-64234(1)

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

Patch Availability(6)

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 ... 5.10.92-2 (54 versions)
  • every version up to 5.10.259-1: fixed in 5.10.259-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)
  • every version up to 6.1.176-1: fixed in 6.1.176-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)
  • every version up to 6.12.94-1: fixed in 6.12.94-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (142 versions)
  • every version up to 7.0.12-1: fixed in 7.0.12-1
—

Weakness Classification(1)

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

All Vendor Advisories

(6)

Data Freshness Timeline

(refreshed 11× in last 7d / 58× 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 199 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 99 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-12 15:48 UTCEG score recompute
  4. 2026-10-11 19:32 UTCEG score recompute
  5. 2026-10-11 16:48 UTCEG score recompute
  6. 2026-10-11 14:09 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-04 07:43 UTCEG score recompute
  16. 2026-10-04 07:43 UTCVendor advisory
  17. 2026-10-04 07:43 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-10-03 03:19 UTCEG score recompute
  20. 2026-10-03 03:19 UTCVendor advisory
  21. 2026-10-03 03:19 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-10-01 06:03 UTCEG score recompute
  25. 2026-10-01 06:03 UTCVendor advisory
Show 75 more
  1. 2026-10-01 06:03 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-09-28 04:28 UTCEG score recompute
  5. 2026-09-28 04:28 UTCVendor advisory
  6. 2026-09-28 04:28 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-09-25 10:10 UTCEG score recompute
  9. 2026-09-25 10:10 UTCVendor advisory
  10. 2026-09-25 10:10 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  11. 2026-09-23 22:18 UTCVendor advisory
  12. 2026-09-23 22:18 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  13. 2026-09-22 22:15 UTCEG score recompute
  14. 2026-09-22 22:15 UTCVendor advisory
  15. 2026-09-22 22:15 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  16. 2026-09-20 01:41 UTCEG score recompute
  17. 2026-09-20 01:41 UTCVendor advisory
  18. 2026-09-20 01:41 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-09-18 08:39 UTCEG score recompute
  21. 2026-09-18 08:39 UTCVendor advisory
  22. 2026-09-18 08:39 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  23. 2026-09-17 09:14 UTCEG score recompute
  24. 2026-09-17 09:14 UTCVendor advisory
  25. 2026-09-17 09:14 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  26. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-09-16 06:40 UTCEG score recompute
  28. 2026-09-16 06:40 UTCVendor advisory
  29. 2026-09-16 06:40 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  30. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-09-14 16:07 UTCEG score recompute
  32. 2026-09-14 16:07 UTCVendor advisory
  33. 2026-09-14 16:07 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  34. 2026-09-13 15:26 UTCVendor advisory
  35. 2026-09-13 15:26 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  36. 2026-09-12 15:47 UTCVendor advisory
  37. 2026-09-12 15:47 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  38. 2026-09-11 16:37 UTCEG score recompute
  39. 2026-09-11 16:37 UTCVendor advisory
  40. 2026-09-11 16:37 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  41. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  42. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  43. 2026-09-10 14:44 UTCEG score recompute
  44. 2026-09-10 14:44 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  45. 2026-09-09 08:47 UTCEG score recompute
  46. 2026-09-09 08:47 UTCVendor advisory
  47. 2026-09-09 08:47 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  48. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  49. 2026-09-07 21:25 UTCEG score recompute
  50. 2026-09-07 21:25 UTCVendor advisory
  51. 2026-09-07 21:25 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  52. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  53. 2026-09-06 18:34 UTCEG score recompute
  54. 2026-09-06 18:34 UTCVendor advisory
  55. 2026-09-06 18:34 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  56. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  57. 2026-09-05 19:24 UTCEG score recompute
  58. 2026-09-05 19:24 UTCVendor advisory
  59. 2026-09-05 19:23 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  60. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  61. 2026-09-04 12:51 UTCEG score recompute
  62. 2026-09-04 12:51 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  63. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  64. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  65. 2026-09-01 23:16 UTCEG score recompute
  66. 2026-09-01 23:16 UTCVendor advisory
  67. 2026-09-01 23:16 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  68. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  69. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  70. 2026-08-30 23:27 UTCEG score recompute
  71. 2026-08-30 23:27 UTCVendor advisory
  72. 2026-08-30 23:27 UTCGHSA enrichmentGHSA-hhmc-qrcv-x7hv · GitHub CVSS 5.5
  73. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  74. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  75. 2026-08-30 00:18 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-64234?
CVE-2026-64234 is a medium-severity vulnerability; its CVE record was published on July 24, 2026. In the Linux kernel, the following vulnerability has been resolved: tty: serial: pchuart: add check for dmaalloc_coherent() Add a check for dmaalloccoherent() failure to prevent a potential NULL pointer dereference in dmahandlerx(). Properly release DMA channels and the PCI device reference using a…
When was the CVE record for CVE-2026-64234 published?
The CVE record for CVE-2026-64234 was published on July 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 August 12, 2026; the record at its source may have been updated since.
Is CVE-2026-64234 actively exploited?
CVE-2026-64234 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64234?
CVE-2026-64234 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64234?
A fix for CVE-2026-64234 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64234 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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