CVE-2026-72084: Linux kernel · scsi: target: Bound PR-OUT TransportID parsing to the received buffer
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 9.8 Critical · fixed in 5.15.0-1117.124~20.04.1 : patch Linux kernel as a priority.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 54% 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 +43
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation 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 and should be applied to affected Linux kernel versions to address this vulnerability. The fix includes proper bounds checking and validation of PR-OUT TransportID parameters to prevent out-of-bounds reads. Users should update to patched kernel versions as provided by their Linux distribution vendors. No additional mitigations are required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's SCSI target subsystem involving improper bounds checking in parsing Persistent Reserve Out (PR-OUT) TransportID parameters has been resolved. The flaw allows an initiator to submit a malformed iSCSI TransportID that causes an out-of-bounds read, potentially leading to a kernel crash (KASAN vmalloc-out-of-bounds). The issue affects devices exported through iSCSI Target Portal Groups (TPG), including guests via vhost-scsi. The vulnerability is addressed by adding proper length checks and bounding string operations to prevent buffer over-reads.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72084 (opens in a new tab)
- git.kernel.org/stable/c/004ccd2d3b4ac36a300e05e01df152e5c02a5a82 (opens in a new tab)
- git.kernel.org/stable/c/03fbc7de8d5e85fc8420e57e8304c855efd453ab (opens in a new tab)
- git.kernel.org/stable/c/555a89846ed888d7401b3f7200934c0fbedcbb46 (opens in a new tab)
- git.kernel.org/stable/c/6ca5de8782e67573a61a6736b6dc0ffe58dcdf59 (opens in a new tab)
- git.kernel.org/stable/c/842248047ef28dbf3b3f7f49a0ec315054d4dab8 (opens in a new tab)
- git.kernel.org/stable/c/9298078a8f7d8181a04614a34ab655ccdf038204 (opens in a new tab)
- git.kernel.org/stable/c/d04a179085c262c9ed577d0a4cbc6482ff1fd9a3 (opens in a new tab)
- ubuntu.com/security/CVE-2026-72084 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72084 (opens in a new tab)
- git.kernel.org/linus/d04a179085c262c9ed577d0a4cbc6482ff1fd9a3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8781-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)