CVE-2026-98552: Linux kernel · perf/core: Fix a refcount leak in attach_perf_ctx_data()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in cca4980630b3c7a85f53cb43c6018184ce5d4e37 : update Linux kernel 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 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in cca4980630b3c7a85f53cb43c6018184ce5d4e37, 23250517cd475367653f1e99396967f54c6f1b7c, 5286d4eb5cd7e10d7d93c3cc596e18bc8ad80f72
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 cca4980630b3c7a85f53cb43c6018184ce5d4e37, 23250517cd475367653f1e99396967f54c6f1b7c or 5286d4eb5cd7e10d7d93c3cc596e18bc8ad80f72.
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– |
AI-suggested
A fix for this vulnerability has been committed in the Linux kernel, as indicated by the fixed commit hashes. Users should update to a Linux kernel version that includes these fixes to remediate the issue. No additional mitigation steps are indicated.
Description
A reference count leak vulnerability was fixed in the Linux kernel function attach_perf_ctx_data(). The flaw occurs due to a race condition between global and non-global cases, potentially causing a reference count leak when the global field is not set correctly. This can lead to resource management issues in the kernel's performance context data handling.