Integrity bypass via skipped asynchronous decrypt hash
Published May 1, 2026 · Updated May 1, 2026
Integrity verification bypass in the Linux Kernel krb5enc component allows remote attackers to inject unauthenticated decrypted data. The krb5enc_dispatch_decrypt() asynchronous path installs the caller's completion handler directly, so completion skips krb5enc_dispatch_decrypt_hash() and accepts plaintext without the required hash check. Exploitation requires the asynchronous skcipher path; accepted modified data compromises integrity, while no confidentiality or availability impact is reported.
Summary
What happened
Integrity verification bypass in the Linux Kernel krb5enc component allows remote attackers to inject unauthenticated decrypted data. The krb5enc_dispatch_decrypt() asynchronous path installs the caller's completion handler directly, so completion skips krb5enc_dispatch_decrypt_hash() and accepts plaintext without the required hash check. Exploitation requires the asynchronous skcipher path; accepted modified data compromises integrity, while no confidentiality or availability impact is reported.
The record
- CVE
- CVE-2026-31719
- Published
- May 1, 2026
- Updated
- May 1, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 1, 2026CVE publishedPublication date reported by the CVE source.
- May 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=6.15
- Affected versionversion=d1775a177f7f38156d541c8a3e3c91eaa6e69699 <07cbb1bd424370671814a862913c99a6e1441588
- Affected versionversion=d1775a177f7f38156d541c8a3e3c91eaa6e69699 <3bfbf5f0a99c991769ec562721285df7ab69240b
- Affected versionversion=d1775a177f7f38156d541c8a3e3c91eaa6e69699 <e51f42114abbdf47f29dda43e7826be28907fcd2
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What is affected?
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Attacks
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Technologies
Your stack
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Your stack
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