CVE-2026-93247: Linux kernel · Bluetooth: mgmt: fix 'hdev->discovery.uuids' NULL dereference
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available that adds proper locking around the 'uuid_count' and 'uuids' members of the 'discovery_state' structure and ensures 'uuid_count' is assigned only after successful memory allocation. Users should apply the official Linux kernel updates that include this fix. Since this is a kernel-level vulnerability, updating to patched kernel versions is the recommended remediation.
Description
A vulnerability in the Linux kernel's Bluetooth management subsystem (CVE-2026-93247) involves a NULL pointer dereference due to a race condition when accessing 'uuid_count' and 'uuids' members of the 'discovery_state' structure without proper locking. This can cause kernel crashes (NULL pointer dereference) during Bluetooth device discovery. The issue arises because 'uuid_count' may be non-zero while 'uuids' is NULL, leading to a NULL dereference in functions processing Bluetooth discovery data. The fix involves adding proper locking around all accesses to these members and ensuring 'uuid_count' is only set after successful memory allocation for 'uuids'.
References
- ubuntu.com/security/CVE-2026-93247 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93247 (opens in a new tab)
- git.kernel.org/stable/c/bbd262d2d750b67b15a5e1008d3848309c87e7a7 (opens in a new tab)
- git.kernel.org/stable/c/ee2135a14fb2a3e176149122764d293f0796b1eb (opens in a new tab)
- git.kernel.org/stable/c/c3f63610bceaa182e4683b23cc47baf36b5f1496 (opens in a new tab)
- git.kernel.org/stable/c/59eecbe2f2f38d8f3e1104bd11da97f9a2c58998 (opens in a new tab)
- git.kernel.org/stable/c/18fda026a13c5abd6c1e0dfd3549f490b73378fb (opens in a new tab)
- git.kernel.org/stable/c/f02c01ccd12cb2b8a290077d4c90f29a6e109b16 (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-93247.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)