CVE-2026-68188

UNRATEDCVSS · not yet scored

Also known asEUVD-2026-55289 (ENISA EUVD) · GHSA-qrj4-v2pf-wj3g (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:

Bluetooth: RFCOMM: Fix session UAF in set_termios

rfcomm_tty_set_termios() tests dlc->session without rfcomm_mutex and later passes the pointer to rfcomm_send_rpn(). The latter dereferences both session->initiator and session->sock. Meanwhile, krfcommd can unlink the DLC and free the session while holding rfcomm_mutex.

The race can proceed as follows:

TTY ioctl task krfcommd -------------- -------- load dlc->session enter rfcomm_send_rpn() lock rfcomm_mutex clear dlc->session free session unlock rfcomm_mutex read session->initiator

KASAN reported:

BUG: KASAN: slab-use-after-free in rfcomm_send_rpn+0x297/0x2a0 Read of size 4 at addr ffff88810012a850 by task poc/92

Call Trace: rfcomm_send_rpn+0x297/0x2a0 rfcomm_tty_set_termios+0x50d/0x850 tty_set_termios+0x596/0x950 set_termios+0x46a/0x6e0 tty_mode_ioctl+0x152/0xbd0 tty_ioctl+0x915/0x1240 __x64_sys_ioctl+0x134/0x1c0

Allocated by task 92: rfcomm_session_add+0x9e/0x2e0 rfcomm_dlc_open+0x8b1/0xe00 rfcomm_dev_activate+0x85/0x1a0 rfcomm_tty_open+0x90/0x280

Freed by task 68: kfree+0x131/0x3c0 rfcomm_session_del+0x119/0x180 rfcomm_run+0x737/0x4710

Add rfcomm_dlc_send_rpn(), which holds rfcomm_mutex while it verifies that the DLC is still attached and sends the RPN frame. Have the TTY path use the helper and drop its unlocked session check. This keeps the session valid through both the frame construction and socket send.

CVSS
—
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
—
EPSS PROB
0.2%
EPSS %ILE
12th
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 2026-11-06). 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: 60 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)60 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 Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

November 6, 2026

References (8)

Vendor Advisories for CVE-2026-68188(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-virtual-6.8 (6.8.0-147.147) @ noble2026-10-29ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-38.38~24.04.4) @ noble2026-10-29ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1071.79) @ noble2026-10-29ubuntu
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-virtual-hwe-26.04-edge (7.0.0-38.38) @ resolute2026-10-29ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1114.120~20.04.1) @ focal2026-10-29ubuntu
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-tools-gcp-lts-22.04 (5.15.0.1118.115) @ jammy2026-10-29ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1080 (5.15.0-1080.84) @ jammy2026-10-29ubuntu
ubuntulinux-tools-azure-lts-26.04 (7.0.0-1017.17) @ resolute2026-10-29ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1015.15) @ resolute2026-10-29ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1112.112) @ jammy2026-10-29ubuntu
redhatkernel-0:6.12.0-211.58.1.el10_22026-09-23redhat
redhatkernel-0:5.14.0-687.50.1.el9_82026-09-23redhat
redhatkernel-0:4.18.0-553.166.1.el8_102026-09-22redhat
redhatkernel-rt-0:4.18.0-553.166.1.rt7.507.el8_102026-09-22redhat
linuxKernel @ 5.10.265 (fixes >=2.6.14)—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 (164 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 12× in last 7d / 37× 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 its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 139 rows 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 39 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  6. 2026-11-06 17:31 UTCVendor advisory
  7. 2026-11-06 17:31 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  8. 2026-11-06 17:27 UTCNVD update
  9. 2026-11-06 16:53 UTCEchelonGraph re-scored
  10. 2026-11-06 16:53 UTCVendor advisory
  11. 2026-11-06 16:53 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  12. 2026-11-06 16:52 UTCMITRE cvelistV5
  13. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-29 17:31 UTCEchelonGraph re-scored
  22. 2026-10-29 17:31 UTCVendor advisory
  23. 2026-10-29 17:31 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  24. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
Show 75 more
  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-10-27 02:55 UTCOSV refresh
  3. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-25 14:10 UTCEchelonGraph re-scored
  6. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  7. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-18 03:20 UTCEchelonGraph re-scored
  14. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-12 15:45 UTCEchelonGraph re-scored
  20. 2026-10-11 19:30 UTCEchelonGraph re-scored
  21. 2026-10-11 16:45 UTCEchelonGraph re-scored
  22. 2026-10-11 14:06 UTCEchelonGraph re-scored
  23. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  26. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  27. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  28. 2026-10-07 02:24 UTCVendor advisory
  29. 2026-10-07 02:24 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  30. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  31. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  32. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  33. 2026-10-04 05:25 UTCVendor advisory
  34. 2026-10-04 05:25 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  35. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  36. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  37. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  38. 2026-09-30 22:41 UTCEchelonGraph re-scored
  39. 2026-09-30 22:41 UTCVendor advisory
  40. 2026-09-30 22:41 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  41. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  42. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  43. 2026-09-27 16:57 UTCVendor advisory
  44. 2026-09-27 16:57 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  45. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  46. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  47. 2026-09-23 21:13 UTCVendor advisory
  48. 2026-09-23 21:13 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  49. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  50. 2026-09-20 21:24 UTCVendor advisory
  51. 2026-09-20 21:24 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  52. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  53. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  54. 2026-09-18 00:50 UTCVendor advisory
  55. 2026-09-18 00:50 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  56. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  57. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  58. 2026-09-15 00:42 UTCVendor advisory
  59. 2026-09-15 00:42 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  60. 2026-09-12 02:26 UTCVendor advisory
  61. 2026-09-12 02:26 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  62. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  63. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  64. 2026-09-09 05:54 UTCVendor advisory
  65. 2026-09-09 05:54 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  66. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  67. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  68. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  69. 2026-09-06 03:08 UTCVendor advisory
  70. 2026-09-06 03:08 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  71. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  72. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  73. 2026-09-03 06:34 UTCVendor advisory
  74. 2026-09-03 06:34 UTCGHSA enrichmentGHSA-qrj4-v2pf-wj3g
  75. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2026-68188?
CVE-2026-68188 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: Bluetooth: RFCOMM: Fix session UAF in set_termios rfcomm_tty_set_termios() tests dlc->session without rfcomm_mutex and later passes the pointer to rfcomm_send_rpn(). The latter dereferences both session->initiator and…
When was the CVE record for CVE-2026-68188 published?
The CVE record for CVE-2026-68188 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 November 6, 2026; the record at its source may have been updated since.
Is CVE-2026-68188 actively exploited?
CVE-2026-68188 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-68188?
A fix for CVE-2026-68188 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-68188 are linked in the Vendor Advisories panel on this page.

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