CVE-2026-64505: Linux kernel · usb: gadget: function: rndis: add length check for header
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +58
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Jul 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 and should be applied to affected Linux kernel versions. The vendor advisory confirms that this issue has been fixed. Users should update their Linux kernel to a patched version to remediate this vulnerability.
Description
A vulnerability in the Linux kernel's USB gadget RNDIS function was resolved by adding a length check for the RNDIS header. This check ensures that critical fields such as MessageType, MessageLength, DataOffset, and DataLength are present before being accessed, preventing potential improper memory access. The issue affects specific Linux kernel versions and has been patched. No known exploits are reported in the wild.
References
- ubuntu.com/security/CVE-2026-64505 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-64505 (opens in a new tab)
- git.kernel.org/linus/21b5bf155435008e0fb0736795289788e63d426f (opens in a new tab)
- git.kernel.org/stable/c/200dd5092296ad4d5ae47f8445a2fb1edd1da973 (opens in a new tab)
- git.kernel.org/stable/c/21b5bf155435008e0fb0736795289788e63d426f (opens in a new tab)
- git.kernel.org/stable/c/7515a6d4a9e9e4838b833825882efa00e85f8901 (opens in a new tab)
- git.kernel.org/stable/c/9facd79028a7807879eb441d12f0e00720980aa3 (opens in a new tab)
- git.kernel.org/stable/c/9ffd567d7bf269824dfac06f8ab9a32fef72699b (opens in a new tab)
- git.kernel.org/stable/c/b73c0142e3acdc063b50c33afb7be19cdb2cd410 (opens in a new tab)
- git.kernel.org/stable/c/ba2cc601e59fe68716646199a33303493513e2e3 (opens in a new tab)
- git.kernel.org/stable/c/d6ef5af7d0fe1ac31e5653a77e6d775dd36bc433 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8727-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8760-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8800-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8760-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-2 (opens in a new tab)