crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption When decrypting data that is not in-place (src != dst), there is no need to save the high-order sequence bits in dst as it could simply be re-copied from the source. However, the data to be hashed need to be rearranged accordingly. Thanks,

Timeline

1. May 1, 2026, 2:15 PM UTCCVE published
2. Oct 16, 2026, 3:13 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 7:06 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in 8c62f618576519dbed6816fafc623ce592953025; From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in d589abd8b019b07075fda255ceab8c8e950cdb3f; From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in 5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5; From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in d0c4ff6812386880f30bc64c2921299cc4d7b47f; From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in 89fe118b6470119b20c04afc36e45b81a69ea11f; From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in 153d5520c3f9fd62e71c7e7f9e34b59cf411e555; From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in cded4002d22177e8deaca1f257ecd932c9582b6b; From 104880a6b470958ddc30e139c41aa4f6ed3a5234 · fixed in e02494114ebf7c8b42777c6cd6982f113bfdbec7

• Linux Linux

  4.3

• KernelLinux

  From 4.3.0 · fixed in 5.10.254; From 5.11.0 · fixed in 5.15.204; From 5.16.0 · fixed in 6.1.170; From 6.2.0 · fixed in 6.6.137; From 6.7.0 · fixed in 6.12.85; From 6.13.0 · fixed in 6.18.22; From 6.19.0 · fixed in 6.19.12

References 8