CVE-2026-98888: Linux kernel · arm64: kprobes: Allow reentering kprobes while single-stepping
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f96a0606de6bcc8d937b80e6470fd7a174c17e26 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:07 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 f96a0606de6bcc8d937b80e6470fd7a174c17e26, c8e84e292ed4cfc199824146da71bb4397b02a1f, bb0fe9121aa0824211aafa33c7d0151fd25ddb75 +4
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 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
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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 kernel version including these fixes to resolve the issue. No additional mitigation steps are required beyond applying the official patch.
Description
This vulnerability in the Linux kernel arm64 kprobes subsystem involves improper handling of reentrant kprobes during single-stepping. The kernel previously treated a kprobe hit during single-step state as unrecoverable, which could lead to issues such as permanently disabled interrupts. The fix allows handling one-level reentry correctly by saving and restoring interrupt flags, preventing system instability.
References
- git.kernel.org/stable/c/bb0fe9121aa0824211aafa33c7d0151fd25ddb75 (opens in a new tab)
- git.kernel.org/stable/c/f96a0606de6bcc8d937b80e6470fd7a174c17e26 (opens in a new tab)
- git.kernel.org/stable/c/1f342b3e44c3035a837b53b217d816f7511c0d0a (opens in a new tab)
- git.kernel.org/stable/c/c8e84e292ed4cfc199824146da71bb4397b02a1f (opens in a new tab)
- git.kernel.org/stable/c/68774caca799e9695db56d426c69acebd041c2ed (opens in a new tab)
- git.kernel.org/stable/c/a21bf9cb893126e8d9730995708d0be5eb167652 (opens in a new tab)
- git.kernel.org/stable/c/23f851ac0078a908bf3422d6467ebc1db5828c46 (opens in a new tab)