CVE-2026-98968: Linux kernel · amt: send the relay's General Query directly from the receive path
Affects Linux kernelSource CVE Database V5
Not known to be exploited · CVSS 8.1 High · fixed in e7183b7d518ce8b3e1f7284f9881d7a87569df14 : patch Linux kernel soon.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in e7183b7d518ce8b3e1f7284f9881d7a87569df14, e7ea63b4195a150604993044ab574d8240f2a399, afae89de73dd693cfa329580ba0fba63bd3f0a11 +2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation 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 to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel versions identified by the fixed commit hashes. Users should update to a Linux kernel version that includes these fixes to remediate the vulnerability. No additional mitigation actions are required beyond applying the official patch.
Description
CVE-2026-98968 is a use-after-free vulnerability in the Linux kernel's AMT (Automatic Multicast Tunneling) relay implementation. It occurs because a socket buffer (skb) queued in a queuing discipline (qdisc) can outlive the tunnel it references via a raw pointer, leading to a use-after-free in the amt_dev_xmit() function. The vulnerability has been fixed by changing the relay's General Query sending logic to avoid queuing the query and dereferencing the tunnel only within a safe RCU read lock section.
References
- git.kernel.org/stable/c/95114e421196250e3d9662f12df442799477d3c3 (opens in a new tab)
- git.kernel.org/stable/c/e7183b7d518ce8b3e1f7284f9881d7a87569df14 (opens in a new tab)
- git.kernel.org/stable/c/181cb48c1e9af6b402567e132f879f89d1c54131 (opens in a new tab)
- git.kernel.org/stable/c/e7ea63b4195a150604993044ab574d8240f2a399 (opens in a new tab)
- git.kernel.org/stable/c/afae89de73dd693cfa329580ba0fba63bd3f0a11 (opens in a new tab)