CVE-2026-98570: Linux kernel · net: ipv6: keep room for the mac header in dst_dev_overhead()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 87cd6b717e4069dca34e0866e57eaeb44d3b173e : patch Linux kernel soon.
Data as of 26 Oct 2026, 13:47 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 87cd6b717e4069dca34e0866e57eaeb44d3b173e, 36c07127924f11fc5741a780abcaaf808fe9ef13, 6.14 +5
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 to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been incorporated into Linux kernel versions 5.11, 5.16, 6.2, 6.7, 6.13, and 6.14. Users and administrators should upgrade to these or later kernel versions to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Description
CVE-2026-98570 is a vulnerability in the Linux kernel's IPv6 networking code where insufficient headroom is reserved for the MAC header in the dst_dev_overhead() function. This can cause a negative offset calculation and an out-of-bounds memory write during MAC header rebuilding when the MAC header is longer than expected, such as with VLAN devices with reorder_hdr off. The issue affects multiple seg6 encapsulation modes and related inline paths. The vulnerability has been fixed in Linux kernel versions 5.11, 5.16, 6.2, 6.7, 6.13, and 6.14.