CVE-2025-68289: Linux kernel · usb: gadget: f_eem: Fix memory leak in eem_unwrap
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1103.110~20.04.1 : 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
- 0.2% 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 5.15.0-1103.110~20.04.1, 5.15.0-1110.119~20.04.1, 5.15.0-1103.112~20.04.1 +74
Exploitation evidence
Disclosed: evidence found.
CVE published 16 Dec 2025
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 25.10linuxpkg:deb/ubuntu/linux?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=questingOther 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-azure kernel versions to fix the memory leak in the f_eem driver. The vendor advisory from Ubuntu confirms that this issue has been resolved in updated kernel releases. Users should update to the fixed kernel versions to mitigate this vulnerability.
Description
A memory leak vulnerability was identified and fixed in the Linux kernel's USB gadget function f_eem, specifically in the eem_unwrap function. The issue was due to improper error handling of usb_ep_queue failures, which could lead to allocated resources not being freed. This flaw was addressed by improving error handling to ensure all resources are released on failure. The vulnerability affects certain versions of the linux-azure kernel prior to specific patch levels. A patch is available to resolve this issue.
References
- ubuntu.com/security/CVE-2025-68289 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68289 (opens in a new tab)
- git.kernel.org/linus/e4f5ce990818d37930cd9fb0be29eee0553c59d9 (opens in a new tab)
- git.kernel.org/stable/c/0ac07e476944a5e4c2b8b087dd167dec248c1bdf (opens in a new tab)
- git.kernel.org/stable/c/0dea2e0069a7e9aa034696f8065945b7be6dd6b7 (opens in a new tab)
- git.kernel.org/stable/c/41434488ca714ab15cb2a4d0378418d1be8052d2 (opens in a new tab)
- git.kernel.org/stable/c/5a1628283cd9dccf1e44acfb74e77504f4dc7472 (opens in a new tab)
- git.kernel.org/stable/c/a9985a88b2fc29fbe1657fe8518908e261d6889c (opens in a new tab)
- git.kernel.org/stable/c/e4f5ce990818d37930cd9fb0be29eee0553c59d9 (opens in a new tab)
- git.kernel.org/stable/c/e72c963177c708a167a7e17ed6c76320815157cf (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8100-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-4 (opens in a new tab)