drm/amdgpu: fix IP instance memory leak on kobject add failure
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EPSS probability
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Risk score
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Published
12 h ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%63
Short explanation
A memory leak vulnerability exists in the Linux kernel drm/amdgpu subsystem within amdgpu_discovery_sysfs_ips() because failing to check kobject_add() prevents the initial kobject reference from being dropped.
Failing to release resources during registration errors can lead to memory leaks and system instability.
What should be done?
- Follow vendor advisories and updates
Chain of evidence and sources
amdgpu_discovery_sysfs_ips() fonksiyonu ip_hw_instance nesnesini kzalloc_flex() ile tahsis eder.
kobject_add() başarısız olduğunda dönüş değeri yoksayılır ve kobject_put() çağrılmaz.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix IP instance memory leak on kobject add failure amdgpu_discovery_sysfs_ips() allocates ip_hw_instance with kzalloc_flex() and initializes its embedded kobject before calling kobject_add(). If kobject_add() fails, the return value is ignored and execution continues without dropping the initial kobject reference. The failed kobject is not retained in the kset list, so the normal sysfs teardown path cannot find it. As a result, ip_hw_instance_release() is never called and the ip_hw_instance allocation is leaked. Call kobject_put() when kobject_add() fails so the initial reference is dropped and ip_hw_instance_release() can free the allocation. Keep the existing best-effort sysfs behavior by continuing with the remaining IP entries after the failed registration. The issue was identified by a static analysis tool I developed and confirmed by manual review. (cherry picked from commit 5c75fbcca8af1096d8d9415b91d8ea6212c22ee1)
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
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SCORING: CVSS from Multiple Sources
CVSS Scores
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Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-98780 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-98780 weaknesses.
Official Sources and Advisories
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