CVE-2026-74303: Linux kernel · Bluetooth: hci_qca: fix NULL pointer dereference in qca_dmp_hdr() for non-serdev device
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 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.
- Patch
- Available – fixed in 7.0.0-1014.14~24.04.1, 7.0.0-1017.17~24.04.1, 7.0.0-1016.16~24.04.1 +11
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 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
Upgrade to a fixed release listed under Affected software.
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 patch is available that fixes the NULL pointer dereference by adding appropriate NULL checks and fallback logic. Users should update to the fixed Linux kernel versions as provided by their distribution vendors. The vendor advisory confirms the availability of the fix. No additional mitigation steps are indicated.
Description
A NULL pointer dereference vulnerability in the Linux kernel Bluetooth hci_qca driver (CVE-2026-74303) has been fixed. The issue occurs because the qca_dmp_hdr() function dereferences a NULL pointer when handling non-serdev devices, leading to a potential kernel crash. The fix adds a NULL check and fallback logic to prevent the dereference. This vulnerability affects specific Linux kernel versions and has been addressed in updated kernel releases.
References
- nvd.nist.gov/vuln/detail/CVE-2026-74303 (opens in a new tab)
- git.kernel.org/stable/c/6b8cbcf08de0db62254d1981f83db0f94681ccd9 (opens in a new tab)
- git.kernel.org/stable/c/809230cc25dde1d6bb00de2a1eeb5f3199402fbe (opens in a new tab)
- git.kernel.org/stable/c/a209744230f9ce3d7a7e9a0839944f5cb5fa02a4 (opens in a new tab)
- git.kernel.org/stable/c/d54a5fb7d821b88c7c5569d450af59dafccaf414 (opens in a new tab)
- git.kernel.org/stable/c/e284bb94ad4512ec0bcd9b91bda99e67c507f7f8 (opens in a new tab)
- ubuntu.com/security/CVE-2026-74303 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74303 (opens in a new tab)
- git.kernel.org/linus/6b8cbcf08de0db62254d1981f83db0f94681ccd9 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-3 (opens in a new tab)