CVE-2026-93209: Linux kernel · Bluetooth: hci_core: use skb_get() instead of skb_clone() for req_skb
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% 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 replaces skb_clone() with skb_get() in the Bluetooth hci_core code. Users should apply the updated Linux kernel versions that include this patch to resolve the issue.
Description
A vulnerability in the Linux kernel's Bluetooth hci_core component caused intermittent failures of the Bluetooth enable command due to improper handling of command buffers under memory pressure. The issue was that skb_clone() could fail, leading to a NULL pointer and a timeout error. This was fixed by replacing skb_clone() with skb_get(), which cannot fail as it only increments a reference count.
References
- ubuntu.com/security/CVE-2026-93209 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93209 (opens in a new tab)
- git.kernel.org/stable/c/0337fb092873a4146aa854acb554675b49c8f6b5 (opens in a new tab)
- git.kernel.org/stable/c/d0b28e9655f4b3195210627577f81883dc1d0162 (opens in a new tab)
- git.kernel.org/stable/c/f5afdff569a09d1cb8cf19826199d024725576cb (opens in a new tab)
- git.kernel.org/stable/c/d5eef0747071934a1c080ee617fa4fd3566394c5 (opens in a new tab)
- git.kernel.org/stable/c/26f66d5b8a5663af498f7ccc94fc79fb47a2191f (opens in a new tab)
- git.kernel.org/stable/c/d7723320db4c9cb9ec2b9a36140e6c641dd77814 (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-93209.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)