CVE-2026-43033

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

HIGH
7.8
CVSS Score
Published: May 1, 2026 at 02:15 PM UTC
Updated: October 19, 2026 at 08:18 PM UTC
4 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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,

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.3 ≤ v < 5.10.2545.11 ≤ v < 5.15.2045.16 ≤ v < 6.1.1706.13 ≤ v < 6.18.226.19 ≤ v < 6.19.126.2 ≤ v < 6.6.1376.7 ≤ v < 6.12.85104880a6b470958ddc30e139c41aa4f6ed3a52347.07.0 rc17.0 rc27.0 rc37.0 rc47.0 rc57.0 rc6
Vendor states this is fixed in 153d5520c3f9fd62e71c7e7f9e34b59cf411e555 (fixed)
Vendor states this is fixed in 5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5 (fixed)
Vendor states this is fixed in 89fe118b6470119b20c04afc36e45b81a69ea11f (fixed)
Vendor states this is fixed in 8c62f618576519dbed6816fafc623ce592953025 (fixed)
Vendor states this is fixed in cded4002d22177e8deaca1f257ecd932c9582b6b (fixed)
Vendor states this is fixed in d0c4ff6812386880f30bc64c2921299cc4d7b47f (fixed)
Vendor states this is fixed in d589abd8b019b07075fda255ceab8c8e950cdb3f (fixed)
Vendor states this is fixed in e02494114ebf7c8b42777c6cd6982f113bfdbec7 (fixed)
Vendor states this is fixed in 4.3 (unaffected)
Vendor states this is fixed in 5.10.254 (unaffected)
Vendor states this is fixed in 5.15.204 (unaffected)
Vendor states this is fixed in 6.1.170 (unaffected)
Vendor states this is fixed in 6.12.85 (unaffected)
Vendor states this is fixed in 6.18.22 (unaffected)
Vendor states this is fixed in 6.19.12 (unaffected)
Vendor states this is fixed in 6.6.137 (unaffected)
Vendor states this is fixed in 7.0 (unaffected)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-682

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