CVE-2026-98387
Description
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.
How to fix
- Linux Linux89b58645646d1dac34162cc2597f42266bfbf930, 35c3f97569306050e818fa18e17fa97c358f0f28, aea3e1588f08e381a7a57b2bf1a60cc2347904cd, 15fa028589c3a2545f0bff355eff06d5844196bf or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 7988fb2c03c8cf9936f851ab19a6d21b3c3411c0 ≤ v < 89b58645646d1dac34162cc2597f42266bfbf930, 7988fb2c03c8cf9936f851ab19a6d21b3c3411c0 ≤ v < 35c3f97569306050e818fa18e17fa97c358f0f28, 7988fb2c03c8cf9936f851ab19a6d21b3c3411c0 ≤ v < aea3e1588f08e381a7a57b2bf1a60cc2347904cd, 7988fb2c03c8cf9936f851ab19a6d21b3c3411c0 ≤ v < 15fa028589c3a2545f0bff355eff06d5844196bf, 5.5 | 89b58645646d1dac34162cc2597f42266bfbf930, 35c3f97569306050e818fa18e17fa97c358f0f28, aea3e1588f08e381a7a57b2bf1a60cc2347904cd, 15fa028589c3a2545f0bff355eff06d5844196bf |
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