CVE-2026-98353: Linux kernel · RDMA/erdma: Use IRQ-safe XArray helpers for QP and CQ tables
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 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 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 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-aws-6.14pkg:deb/ubuntu/linux-aws-6.14?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-aws-6.17pkg:deb/ubuntu/linux-aws-6.17?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.11pkg:deb/ubuntu/linux-azure-6.11?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.14pkg:deb/ubuntu/linux-azure-6.14?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.17pkg:deb/ubuntu/linux-azure-6.17?arch=source&distro=nobleOther 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 address this issue by using IRQ-safe XArray helpers and proper initialization flags. Users should apply the official kernel updates that include this fix. Since this is a kernel-level issue, upgrading to patched kernel versions is the recommended remediation.
Description
A vulnerability in the Linux kernel's RDMA/erdma subsystem involving the use of non-IRQ-safe XArray helpers for QP and CQ tables has been resolved. The issue caused locked QP and CQ lookups from EQ interrupts to deadlock with create-path XArray updates due to improper locking. This could result in a lookup spinning indefinitely when an interrupt arrives while the create path holds the plain xa_lock. The fix involves using IRQ-safe XArray helpers for all QP and CQ create-path updates and initializing arrays with XA_FLAGS_LOCK_IRQ to preserve interrupt state during sleeping allocations.
References
- ubuntu.com/security/CVE-2026-98353 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98353 (opens in a new tab)
- git.kernel.org/linus/00baeade709fb66da647e8327e8398bb532e30f7 (opens in a new tab)
- git.kernel.org/stable/c/00baeade709fb66da647e8327e8398bb532e30f7 (opens in a new tab)
- git.kernel.org/stable/c/74d4085221a7ec5440996af199ccadfa75b9eb0e (opens in a new tab)