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CVE-2025-39804

In the Linux kernel, the following vulnerability has been resolved:

lib/crypto: arm64/poly1305: Fix register corruption in no-SIMD contexts

Restore the SIMD usability check that was removed by commit a59e5468a921
("crypto: arm64/poly1305 - Add block-only interface").

This safety check is cheap and is well worth eliminating a footgun.
While the Poly1305 functions should not be called when SIMD registers
are unusable, if they are anyway, they should just do the right thing
instead of corrupting random tasks' registers and/or computing incorrect
MACs.  Fixing this is also needed for poly1305_kunit to pass.

Just use may_use_simd() instead of the original crypto_simd_usable(),
since poly1305_kunit won't rely on crypto_simd_disabled_for_test.

Verknüpft mit AI von unstrukturierten Daten zu bestehenden CPE der NVD
This information is available to logged-in users.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
VendorLinux
≫
Product Linux
Default Statusunaffected
Version < ef74efa598b7bbc5c24509f7f56af2806f81c339
Version a59e5468a921937cb7317892779c67046ad9f5cc
Status affected
Version < eec76ea5a7213c48529a46eed1b343e5cee3aaab
Version a59e5468a921937cb7317892779c67046ad9f5cc
Status affected
VendorLinux
≫
Product Linux
Default Statusaffected
Version 6.16
Status affected
Version < 6.16
Version 0
Status unaffected
Version <= 6.16.*
Version 6.16.4
Status unaffected
Version <= *
Version 6.17-rc1
Status unaffected
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.02% 0.05
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string