A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.
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History
Wed, 14 Oct 2026 11:30:00 +0000
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Status: PUBLISHED
Assigner: redhat
Published: 2022-08-24T15:07:31.000Z
Updated: 2026-10-14T10:04:07.798Z
Reserved: 2022-01-24T00:00:00.000Z
Link: CVE-2021-4209
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Status : Modified
Published: 2022-08-24T16:15:09.927
Modified: 2026-10-14T11:16:55.207
Link: CVE-2021-4209