CVE-2026-100075: Linux kernel · RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 9.8 Critical.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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 25 Sep 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
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
The vulnerability has been resolved in updated versions of the linux-azure kernel. Users should apply the official kernel updates that fix the srpt_alloc_rw_ctxs() unwind counter handling to remediate this issue. Patch status is not explicitly stated in the input data, so users should consult the vendor advisory for the exact fixed versions and apply those updates promptly.
Description
A vulnerability in the Linux kernel's RDMA/srpt subsystem was fixed that involved improper cleanup of counters and pointers when srpt_alloc_rw_ctxs() fails partway through processing. This flaw could cause incorrect accounting of send queue credits, potentially leading to resource mismanagement. The issue affects specific linux-azure kernel versions listed. The vulnerability has a high CVSS score of 9.8, indicating critical impact on confidentiality, integrity, and availability.
References
- ubuntu.com/security/CVE-2026-100075 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-100075 (opens in a new tab)
- git.kernel.org/stable/c/f1f2252da52cdda912da9993f39f58783b01b38f (opens in a new tab)
- git.kernel.org/stable/c/af073bd245180393bcb15d33d3990a6bdc32593a (opens in a new tab)
- git.kernel.org/stable/c/bd02d644bd19a2795c018635d273d91e45d2bb95 (opens in a new tab)
- git.kernel.org/stable/c/717ab4d0614e9446bf8e2de6229464499e4008d6 (opens in a new tab)
- git.kernel.org/stable/c/af00051dbc9f467d4840ec709680660a3f8990fa (opens in a new tab)
- git.kernel.org/stable/c/be1478849e1abb1e12dc12e14cdbf800cc6fa99a (opens in a new tab)
- git.kernel.org/stable/c/f65f45dfa1e6e2eaa9e11c8b8ce8857799cb189d (opens in a new tab)
- git.kernel.org/stable/c/b38f98e176050850f41bb6415f3a71400056623e (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-100075.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)