CVE-2026-98558: Linux kernel · net: flush skb_defer_nodes in dev_cpu_dead()
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to c68f4157463448a76893223e117170be8374d773 or 06e3f54e8b22040ada01a28343badf1990b4dd7d when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated Medium 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 c68f4157463448a76893223e117170be8374d773, 06e3f54e8b22040ada01a28343badf1990b4dd7d
Exploitation evidence
Disclosed: evidence found.
CVE published 18 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 c68f4157463448a76893223e117170be8374d773 or 06e3f54e8b22040ada01a28343badf1990b4dd7d.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in the Linux kernel commits c68f4157463448a76893223e117170be8374d773 and 06e3f54e8b22040ada01a28343badf1990b4dd7d. Users and administrators should update to a Linux kernel version that includes these fixes. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel's network subsystem was fixed involving the handling of skb_defer_nodes when a CPU goes offline. The flaw caused deferred socket buffers (skbs) to remain stranded if the CPU holding them went offline, potentially leading to indefinite stalls during network device or driver teardown. The fix ensures proper draining of these deferred skbs and addresses race conditions related to CPU and NUMA node offline events.