CVE-2026-68188

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week
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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%CVSS v2: —Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 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%
EPSS %ILE
12%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 19, 2026

References (8)

Vendor Advisories for CVE-2026-68188(2)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-19 17:25 UTCGHSA enrichment
  3. 2026-08-19 17:21 UTCNVD update
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 16:55 UTCGHSA enrichment
  6. 2026-08-19 16:43 UTCMITRE cvelistV5
  7. 2026-08-18 13:49 UTCEPSS rescore
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-17 05:38 UTCGHSA enrichment
  11. 2026-08-17 05:26 UTCNVD update
  12. 2026-08-17 05:10 UTCGHSA enrichment
  13. 2026-08-17 05:05 UTCMITRE cvelistV5
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 06:31 UTCGHSA enrichment
  16. 2026-08-15 01:30 UTCEPSS rescore
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 09:59 UTCEG score recompute
  19. 2026-08-13 09:59 UTCGHSA enrichment
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-10 13:24 UTCNVD update
  22. 2026-08-10 12:20 UTCEG score recompute
  23. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-68188?
CVE-2026-68188 is a publicly disclosed vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: Fix session UAF in set_termios rfcommttysettermios() tests dlc->session without rfcommmutex and later passes the pointer to rfcommsendrpn(). The latter dereferences both session->initiator and session->sock.…
When was CVE-2026-68188 disclosed?
CVE-2026-68188 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68188 actively exploited?
CVE-2026-68188 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.4% of all scored CVEs.
How do I remediate CVE-2026-68188?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68188, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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