CVE-2025-68229: Linux kernel · scsi: target: tcm_loop: Fix segfault in tcm_loop_tpg_address_show()
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
Official patches are available and should be applied to affected Linux Azure kernel versions. The vendor advisory confirms that this issue has been fixed. Users should update their kernel packages to versions including the fix to prevent this NULL pointer dereference and consequent kernel crash.
Description
A vulnerability in the Linux kernel's scsi target tcm_loop driver caused a NULL pointer dereference leading to a kernel crash (segfault) when a specific allocation failed. This issue was fixed by adding a check before dereferencing a pointer. The flaw affected certain Linux Azure kernel versions prior to specific patch releases. The vulnerability is rated medium severity and has been addressed in official patches.
References
- ubuntu.com/security/CVE-2025-68229 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68229 (opens in a new tab)
- git.kernel.org/linus/e6965188f84a7883e6a0d3448e86b0cf29b24dfc (opens in a new tab)
- git.kernel.org/stable/c/13aff3b8a7184281b134698704d6c06863a8361b (opens in a new tab)
- git.kernel.org/stable/c/1c9ba455b5073253ceaadae4859546e38e8261fe (opens in a new tab)
- git.kernel.org/stable/c/3d8c517f6eb27e47b1a198e05f8023038329b40b (opens in a new tab)
- git.kernel.org/stable/c/63f511d3855f7f4b35dd63dbc58fc3d935a81268 (opens in a new tab)
- git.kernel.org/stable/c/72e8831079266749a7023618a0de2f289a9dced6 (opens in a new tab)
- git.kernel.org/stable/c/a6ef60898ddaf1414592ce3e5b0d94276d631663 (opens in a new tab)
- git.kernel.org/stable/c/e6965188f84a7883e6a0d3448e86b0cf29b24dfc (opens in a new tab)
- git.kernel.org/stable/c/f449a1edd7a13bb025aaf9342ea6f8bf92684bbf (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)