s390/crypto: Fix skcipher_walk return code handling in aes_s390
CVSS score
—
EPSS probability
%0.2
Risk score
—
Published
4 d 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
The Linux kernel aes_s390 crypto driver lacks proper return code checking for skcipher_walk_virt, potentially leading to uninitialized memory access.
Missing return checks can leave the walk structure in an undefined state during data processing loops, causing incorrect behavior and memory access issues.
What should be done?
- Follow vendor advisories and security updates
- Apply official code corrections
Chain of evidence and sources
Linux çekirdeği aes_s390 sürücüsünde skcipher_walk_virt dönüş kodları eksik kontrol edilmektedir.
Doğru kontrolün yapılmaması başlatılmamış belleğe erişime veya hatalı davranışa yol açabilir.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix skcipher_walk return code handling in aes_s390 The return codes from skcipher_walk_virt() were not properly checked before entering the processing loops in ecb_aes_crypt() and ctr_aes_crypt(). If skcipher_walk_virt() fails, the walk structure may be in an undefined state, and attempting to process data could lead to incorrect behavior or accessing uninitialized memory. Add proper return code checking to ensure correct handling of the walk initialization and walk advance and eventually return to the caller with that return code.
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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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-2026-98387 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-2026-98387 weaknesses.
Official Sources and Advisories
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