CVE-2026-98641: Linux kernel · bpf, arm64: set up the frame pointer for the exception callback
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ef1fb82f12186dd26153b14d9fbcf4ec98db81b3 : patch Linux kernel 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 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in ef1fb82f12186dd26153b14d9fbcf4ec98db81b3, ecdd770a9fc3eaf6c3127c5991312b84774a7b0f, d7cd5ebe13989f265015910faa25e5d50faa4c22 +1
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 ef1fb82f12186dd26153b14d9fbcf4ec98db81b3, ecdd770a9fc3eaf6c3127c5991312b84774a7b0f, d7cd5ebe13989f265015910faa25e5d50faa4c22 or b67b4c763f211e7a6391c356fef552e2ea63f08a.
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– |
AI-suggested
The vulnerability is fixed in Linux kernel version 6.12 with patches identified by commits ef1fb82f12186dd26153b14d9fbcf4ec98db81b3, ecdd770a9fc3eaf6c3127c5991312b84774a7b0f, d7cd5ebe13989f265015910faa25e5d50faa4c22, and b67b4c763f211e7a6391c356fef552e2ea63f08a. Users should upgrade to Linux kernel 6.12 or later to remediate this issue. No other mitigation is indicated or required.
Description
A vulnerability in the Linux kernel's BPF subsystem on arm64 architecture involves improper setup of the frame pointer for the exception callback. This flaw can cause a helper function to write over its own return address, potentially leading to a kernel panic due to a fatal exception in interrupt context. The issue arises because the frame pointer register (x25) is not correctly set during exception callbacks, causing stack accesses to reference invalid memory frames.
References
- git.kernel.org/stable/c/ecdd770a9fc3eaf6c3127c5991312b84774a7b0f (opens in a new tab)
- git.kernel.org/stable/c/b67b4c763f211e7a6391c356fef552e2ea63f08a (opens in a new tab)
- git.kernel.org/stable/c/d7cd5ebe13989f265015910faa25e5d50faa4c22 (opens in a new tab)
- git.kernel.org/stable/c/ef1fb82f12186dd26153b14d9fbcf4ec98db81b3 (opens in a new tab)