CVE-2026-68363

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week

Also known asEUVD-2026-55464 (ENISA EUVD) · GHSA-x3fw-jwr8-ppm9 (GitHub Security Advisories)Source: ENISA EUVD

—
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:

wifi: ath9k: hif_usb: don't dereference hif_dev after re-arming firmware request

ath9k_hif_request_firmware() re-arms an asynchronous firmware load via request_firmware_nowait(), passing hif_dev as the completion context, and then still dereferences hif_dev:

dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", hif_dev->fw_name);

The re-armed callback ath9k_hif_usb_firmware_cb() runs on the "events" workqueue and, when the firmware is missing, walks the retry chain into ath9k_hif_usb_firmware_fail() -> complete_all(&hif_dev->fw_done). That releases the wait_for_completion(&hif_dev->fw_done) in a concurrent ath9k_hif_usb_disconnect(), which then kfree()s hif_dev. The trailing dev_info() in the frame that re-armed the request can therefore read freed memory (hif_dev->udev, the first field of struct hif_device_usb):

BUG: KASAN: slab-use-after-free in ath9k_hif_request_firmware Read of size 8 ... by task kworker/... ath9k_hif_request_firmware ath9k_hif_usb_firmware_cb drivers/net/wireless/ath/ath9k/hif_usb.c:1247 request_firmware_work_func Allocated by ...: ath9k_hif_usb_probe drivers/net/wireless/ath/ath9k/hif_usb.c Freed by ...: ath9k_hif_usb_disconnect -> kfree drivers/net/wireless/ath/ath9k/hif_usb.c

The fw_done barrier only makes disconnect wait for the firmware chain to *terminate*; it does not protect the outer ath9k_hif_request_firmware() frame that re-armed the request and keeps touching hif_dev afterwards.

Drop the post-request dev_info(): it is the only use of hif_dev after the async request is armed, and it is purely informational (the dev_err() on the failure path runs only when request_firmware_nowait() did not arm a callback, so hif_dev is still alive there).

This was first reported by syzbot as a single, non-reproduced crash that was later auto-obsoleted, and was independently rediscovered by the reFuzz fuzzer, which produced a C reproducer (USB-gadget connect/disconnect of an ath9k_htc device whose firmware download fails). The vulnerable code is unchanged and still present in v7.1-rc6, where the slab-use-after-free reproduces under KASAN once the (sub-microsecond) race window is widened.

CVSS v3
—
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
—
EG Risk
—
EPSS PROB
0.2%
EPSS %ILE
8th
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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

August 10, 2026

Last Modified

August 19, 2026

References (8)

Vendor Advisories for CVE-2026-68363(6)

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

Patch Availability(19)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1122.131) @ jammy2026-10-29ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1118.128~20.04.1) @ focal2026-10-29ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.198.208~20.04.1) @ focal2026-10-29ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1015.15) @ resolute2026-10-29ubuntu
ubuntulinux-tools-azure-lts-26.04 (7.0.0-1017.17) @ resolute2026-10-29ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-38.38) @ resolute2026-10-29ubuntu
ubuntulinux-tools-aws-edge (7.0.0-1014.14~24.04.1) @ noble2026-10-29ubuntu
ubuntulinux-tools-azure-fde-edge (7.0.0-1016.16~24.04.1) @ noble2026-10-29ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1112.112) @ jammy2026-10-29ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-38.38~24.04.4) @ noble2026-10-29ubuntu
ubuntulinux-virtual-6.8 (6.8.0-147.147) @ noble2026-10-29ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1071.79) @ noble2026-10-29ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1118.115) @ jammy2026-10-29ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1114.120~20.04.1) @ focal2026-10-29ubuntu
redhatkernel-0:5.14.0-687.49.1.el9_82026-09-17redhat
redhatkernel-0:6.12.0-211.56.1.el10_22026-09-17redhat
redhatkernel-0:4.18.0-553.163.1.el8_102026-09-15redhat
redhatkernel-rt-0:4.18.0-553.163.1.rt7.504.el8_102026-09-15redhat
linuxKernel @ 5.10.265 (fixes >=4.4.0)—osv

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 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
linux-6.126.12.100-1~deb12u1
  • every version up to 6.12.101-1~deb12u1: fixed in 6.12.101-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)
  • every version up to 6.12.101-1: fixed in 6.12.101-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (161 versions)
  • every version up to 7.1.6-1: fixed in 7.1.6-1
—

Additional Vendor Advisories

(14)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× 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 121 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 21 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  2. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  3. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  6. 2026-10-29 17:17 UTCEG score recompute
  7. 2026-10-29 17:17 UTCVendor advisory
  8. 2026-10-29 17:17 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  9. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  10. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  11. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-26 09:55 UTCOSV refresh
  14. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-25 14:10 UTCEG score recompute
  16. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-18 03:19 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 75 more
  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-10-12 15:45 UTCEG score recompute
  6. 2026-10-11 19:30 UTCEG score recompute
  7. 2026-10-11 16:45 UTCEG score recompute
  8. 2026-10-11 14:06 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-04 05:22 UTCVendor advisory
  18. 2026-10-04 05:22 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  19. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-09-30 22:38 UTCEG score recompute
  23. 2026-09-30 22:38 UTCVendor advisory
  24. 2026-09-30 22:38 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  26. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  27. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  28. 2026-09-27 13:03 UTCVendor advisory
  29. 2026-09-27 13:03 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  30. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  31. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  32. 2026-09-22 21:17 UTCVendor advisory
  33. 2026-09-22 21:17 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  34. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  35. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  36. 2026-09-19 12:32 UTCVendor advisory
  37. 2026-09-19 12:32 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  38. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  39. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  40. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  41. 2026-09-16 02:33 UTCVendor advisory
  42. 2026-09-16 02:33 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  43. 2026-09-12 11:54 UTCVendor advisory
  44. 2026-09-12 11:54 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  45. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  46. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  47. 2026-09-09 05:52 UTCVendor advisory
  48. 2026-09-09 05:52 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  49. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  50. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  51. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  52. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  53. 2026-09-05 03:56 UTCVendor advisory
  54. 2026-09-05 03:56 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  55. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  56. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  57. 2026-09-01 21:54 UTCVendor advisory
  58. 2026-09-01 21:54 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  59. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  60. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  61. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  62. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  63. 2026-08-29 15:29 UTCVendor advisory
  64. 2026-08-29 15:29 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  65. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  66. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  67. 2026-08-26 05:28 UTCVendor advisory
  68. 2026-08-26 05:28 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  69. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  70. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  71. 2026-08-22 23:26 UTCVendor advisory
  72. 2026-08-22 23:26 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9
  73. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  74. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  75. 2026-08-19 17:24 UTCGHSA enrichmentGHSA-x3fw-jwr8-ppm9

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2026-68363?
CVE-2026-68363 is a vulnerability whose severity is not yet rated; its CVE record was published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: hif_usb: don't dereference hif_dev after re-arming firmware request ath9k_hif_request_firmware() re-arms an asynchronous firmware load via request_firmware_nowait(), passing hif_dev as the completion context, and then…
When was the CVE record for CVE-2026-68363 published?
The CVE record for CVE-2026-68363 was published on August 10, 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 19, 2026; the record at its source may have been updated since.
Is CVE-2026-68363 actively exploited?
CVE-2026-68363 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-68363?
A fix for CVE-2026-68363 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-68363 are linked in the Vendor Advisories panel on this page.

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