CVE-2026-89529: Linux kernel · svcrdma: Reject oversized Read segments at decode time
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 11 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
A fix has been implemented in the Linux kernel to reject oversized Read segments during decoding and to ensure proper resource cleanup on overrun detection. Users should apply the updated kernel versions that include this fix. Patch status is not explicitly stated in the input data; therefore, check the vendor advisory for current remediation guidance.
Description
A vulnerability in the Linux kernel's svcrdma component allows oversized Read segments to be processed without proper validation, potentially causing resource leaks. The issue arises because the RPC/RDMA Read list decoder does not cap segment lengths, leading to large dynamic allocations that may exceed the receive context's page budget. This can trigger a page-overrun guard, which leaks the resource by not returning the acquired read-write context. The vulnerability has been addressed by rejecting segments that exceed the page budget during decoding and ensuring proper resource cleanup on overrun detection.
References
- nvd.nist.gov/vuln/detail/CVE-2026-89529 (opens in a new tab)
- git.kernel.org/stable/c/5120fe54e0e2f5b62797a432115cc61d61117a5b (opens in a new tab)
- git.kernel.org/stable/c/af6f0e06bed818ee7fc8b869915964410020a1c5 (opens in a new tab)
- ubuntu.com/security/CVE-2026-89529 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89529 (opens in a new tab)
- git.kernel.org/linus/af6f0e06bed818ee7fc8b869915964410020a1c5 (opens in a new tab)