CVE-2026-98878: Linux kernel · irqchip/gic-v5: Immediately exec priority drop following activate
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to c29bb5acd0cad0b49399d1399dd1bacb39e41438 or abf60331ebe9a9a7937a72aac7699c2907ab9307 soon.
Data as of 26 Oct 2026, 12:55 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in c29bb5acd0cad0b49399d1399dd1bacb39e41438, abf60331ebe9a9a7937a72aac7699c2907ab9307
Exploitation evidence
Disclosed: evidence found.
CVE published 23 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
Upgrade Linux kernel to c29bb5acd0cad0b49399d1399dd1bacb39e41438 or abf60331ebe9a9a7937a72aac7699c2907ab9307.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel. The priority drop now occurs immediately after interrupt acknowledgment rather than during irq_eoi(), preventing the blocking of interrupts. Users should update to the fixed Linux kernel version 6.17 or later containing the commits c29bb5acd0cad0b49399d1399dd1bacb39e41438 and abf60331ebe9a9a7937a72aac7699c2907ab9307.
Description
CVE-2026-98878 is a vulnerability in the Linux kernel's irqchip/gic-v5 driver where interrupts of equal or lower priority cannot be signaled until a priority drop occurs. This behavior can cause a denial of service by blocking incoming interrupts during long-running processes or virtual machine operations. The issue was fixed by changing when the priority drop occurs, moving it to immediately after interrupt acknowledgment rather than at the end of interrupt handling.