binder: fix is_failure flag for superseded transaction cleanup
CVSS score
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EPSS probability
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Risk score
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Published
9 h ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
2
Source agreement
Tam uyum
Evidence confidence
%63
Short explanation
A vulnerability exists in the Linux kernel binder subsystem due to an incorrect is_failure flag during the cleanup of superseded asynchronous transactions. This flaw causes the cleanup handler to interpret stale buffer contents as file descriptor numbers, closing unrelated file descriptors.
This vulnerability can lead to the closure of unrelated file descriptors, potentially causing system instability or improper file access conditions. The patch status is currently assessed as UNKNOWN.
What should be done?
- Follow vendor advisories for updates and remediation guidance
Chain of evidence and sources
Geçersiz kılınan asenkron işlemlerin temizlenmesi sırasında is_failure bayrağının yanlış ayarlanması güvenlik açığına yol açar.
İnceleme sonucunda yama durumu UNKNOWN olarak belirlenmiştir.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: binder: fix is_failure flag for superseded transaction cleanup When a TF_UPDATE_TXN transaction supersedes a pending async transaction, binder_release_entire_buffer() is called with is_failure=false. Since the superseded transaction was never delivered, binder_apply_fd_fixups() was never called and no fds were installed in the target process. With is_failure=false, the BINDER_TYPE_FDA cleanup handler interprets stale buffer contents as installed fd numbers and passes them to binder_deferred_fd_close(), closing unrelated file descriptors. Pass is_failure=true since the transaction was never delivered to the target, matching the semantics of all other undelivered-transaction cleanup paths.
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
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
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| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
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-2026-98778 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-2026-98778 weaknesses.
Official Sources and Advisories
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