CVE-2026-99152: Linux kernel · scsi: libiscsi: Validate the task named by a management response
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 03:59 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther 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 fix has been implemented in the Linux kernel to validate that the task referenced by management responses is in flight and not a SCSI command, preventing NULL pointer dereferences. Users should update to a patched kernel version that includes this fix. Since this is a kernel vulnerability, applying the official kernel update is the recommended remediation.
Description
A vulnerability in the Linux kernel's SCSI libiscsi component allows a target to specify an invalid task index in management responses, leading to a NULL pointer dereference and kernel crash. The flaw occurs because the task index is only bounds-checked against the maximum command slots but not verified to be in flight or valid, causing dereferencing of a NULL connection pointer. This can be triggered by sending a single unsolicited NOP-In or a Text Response with the same invalid task identifier. The issue has been resolved by requiring the task to be in flight and not a SCSI command, preventing invalid task references.
References
- ubuntu.com/security/CVE-2026-99152 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-99152 (opens in a new tab)
- git.kernel.org/stable/c/55a65ef61e2775aeb18fda63bd1959fa8b41f936 (opens in a new tab)
- git.kernel.org/stable/c/11bffcd9cb346732eab2914ef44fe777a3f0b585 (opens in a new tab)
- git.kernel.org/stable/c/f721487523d45941aed4b0ac8d829b0461a7d860 (opens in a new tab)