CVE-2026-23054: Linux kernel · net: hv_netvsc: reject RSS hash key programming without RX indirection table
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 6.8.0-1057.60~22.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 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 6.8.0-1057.60~22.04.1, 6.8.0-1059.65~22.04.1, 6.8.0-1060.63~22.04.1 +27
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Feb 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 25.10linuxpkg:deb/ubuntu/linux@6.17.0-40.40?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1019.19?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1020.20?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp@6.17.0-1020.22?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle@6.17.0-1018.18?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 from the vendor and should be applied promptly. The vulnerability is fixed by updating the linux-azure kernel to versions 6.8.0-1057.60~22.04.1 or later as listed in the vendor advisory. After applying the update, a system reboot is required to complete the remediation. Due to an ABI change, recompilation and reinstallation of third-party kernel modules may be necessary. Follow the vendor's official update instructions to ensure full remediation.
Description
A vulnerability in the Linux kernel's hv_netvsc driver was resolved that prevented proper handling of RSS hash key programming when no RX indirection table is configured. This flaw could cause the system to hang if RSS hash key updates were accepted without a valid RX indirection table. The issue was fixed by gating the relevant function to check for the presence of the RX indirection table and returning an error if absent. This vulnerability affects specific linux-azure kernel versions prior to 6.8.0-1057.60~22.04.1 and related versions. A patch is available and should be applied to prevent system hangs related to this issue.
References
- ubuntu.com/security/CVE-2026-23054 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-23054 (opens in a new tab)
- git.kernel.org/linus/d23564955811da493f34412d7de60fa268c8cb50 (opens in a new tab)
- git.kernel.org/stable/c/11dd9a9ef4dc4507a15a69b8511a0013c6c28fa3 (opens in a new tab)
- git.kernel.org/stable/c/4cd55c609e85ae2313248ef1a33619a3eef44a16 (opens in a new tab)
- git.kernel.org/stable/c/82c9039c8ebb715753a40434df714f865a3aec9c (opens in a new tab)
- git.kernel.org/stable/c/d23564955811da493f34412d7de60fa268c8cb50 (opens in a new tab)
- ubuntu.com/security/notices/USN-8278-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8289-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8296-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8296-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8289-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8278-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8393-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8440-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8499-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8570-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8594-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8604-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8605-1 (opens in a new tab)