[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Xen Security Advisory 525 v1 (CVE-2024-36350,CVE-2024-36357,CVE-2026-0004) - x86: Transient Scheduler Attacks (update)
- To: "Xen.org security team" <security@xxxxxxx>, xen-announce@xxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxx, oss-security@xxxxxxxxxxxxxxxxxx
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 10 Nov 2026 23:51:08 +0000
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=XbP1YOaEu2PHMTVOo/IAULgMh8tNX2fZCTaWWZXFXrI=; b=ZuZ/L+cwQOLV4Z5xxotj7Q8y9cYs4pQ390wM0idY4RjM5vQetuQvXba/GKk+tvVY0jTJ3lQ27LTslfXUIOuMdDDmqw/Ic9f6OQet2oW32BYbqwfPWPh/Kd0A42oxOgf6lkWrlkgh9JWygPDA5/hJ5DqvGMTdSyEUN7W6mUGGFTDoqN88hLf7on5YIZdiG5OP05BH9L0XWfKXZ6B/k5YirZm2Dd887UPLSB6eVnQWVMSLIVaMmJF3K75RIK6WT1ujIwR0lr3qmoyov0q7F0xhwf9HtAIvWnneDgllY1IU9OeXyLMvQqhisW4O26Gf2a2IfjYvLDExnKpDbHNAsV1qBw==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=KXLAeqNBCNfw4Dh2xdMGoHAH+1Z5FYg6UatP+lz8trV7QyIuCDdzrDs9U5I/d3gs2oWjDEdIn5RV1/1eaYOGA9mokD1vniYOJA2Lra/J/6+pAsUBtVbutI8BP3yDWehKXP0YOwGqiBCO0x7YrPvsQSx6PQ2KuaWUWJiarEuu3kb/6RGtHVtS0G7AxTO3R3aB7xb3NMIGKnhRvquoqJdcLeOnnQn3FG94AQUpOiz4wZgmDkHNoX0KRAYIyjpHSG/93dBqDvh7Ig9LPiKUmh96vw9Ig0WbyJeCJoRed7pxciPp+di4xxNFCVqPDsGoiHwsmoxjmeSPssDmF/XvPaPUXw==
- Authentication-results: eu.smtp.expurgate.cloud; dkim=pass header.s=selector1 header.d=citrix.com header.i="@citrix.com" header.h="From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck"
- Authentication-results: mx.microsoft.com 1; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=citrix.com;
- Autocrypt: addr=andrew.cooper3@xxxxxxxxxx; keydata= xsFNBFLhNn8BEADVhE+Hb8i0GV6mihnnr/uiQQdPF8kUoFzCOPXkf7jQ5sLYeJa0cQi6Penp VtiFYznTairnVsN5J+ujSTIb+OlMSJUWV4opS7WVNnxHbFTPYZVQ3erv7NKc2iVizCRZ2Kxn srM1oPXWRic8BIAdYOKOloF2300SL/bIpeD+x7h3w9B/qez7nOin5NzkxgFoaUeIal12pXSR Q354FKFoy6Vh96gc4VRqte3jw8mPuJQpfws+Pb+swvSf/i1q1+1I4jsRQQh2m6OTADHIqg2E ofTYAEh7R5HfPx0EXoEDMdRjOeKn8+vvkAwhviWXTHlG3R1QkbE5M/oywnZ83udJmi+lxjJ5 YhQ5IzomvJ16H0Bq+TLyVLO/VRksp1VR9HxCzItLNCS8PdpYYz5TC204ViycobYU65WMpzWe LFAGn8jSS25XIpqv0Y9k87dLbctKKA14Ifw2kq5OIVu2FuX+3i446JOa2vpCI9GcjCzi3oHV e00bzYiHMIl0FICrNJU0Kjho8pdo0m2uxkn6SYEpogAy9pnatUlO+erL4LqFUO7GXSdBRbw5 gNt25XTLdSFuZtMxkY3tq8MFss5QnjhehCVPEpE6y9ZjI4XB8ad1G4oBHVGK5LMsvg22PfMJ ISWFSHoF/B5+lHkCKWkFxZ0gZn33ju5n6/FOdEx4B8cMJt+cWwARAQABzSlBbmRyZXcgQ29v cGVyIDxhbmRyZXcuY29vcGVyM0BjaXRyaXguY29tPsLBegQTAQgAJAIbAwULCQgHAwUVCgkI CwUWAgMBAAIeAQIXgAUCWKD95wIZAQAKCRBlw/kGpdefoHbdD/9AIoR3k6fKl+RFiFpyAhvO 59ttDFI7nIAnlYngev2XUR3acFElJATHSDO0ju+hqWqAb8kVijXLops0gOfqt3VPZq9cuHlh IMDquatGLzAadfFx2eQYIYT+FYuMoPZy/aTUazmJIDVxP7L383grjIkn+7tAv+qeDfE+txL4 SAm1UHNvmdfgL2/lcmL3xRh7sub3nJilM93RWX1Pe5LBSDXO45uzCGEdst6uSlzYR/MEr+5Z JQQ32JV64zwvf/aKaagSQSQMYNX9JFgfZ3TKWC1KJQbX5ssoX/5hNLqxMcZV3TN7kU8I3kjK mPec9+1nECOjjJSO/h4P0sBZyIUGfguwzhEeGf4sMCuSEM4xjCnwiBwftR17sr0spYcOpqET ZGcAmyYcNjy6CYadNCnfR40vhhWuCfNCBzWnUW0lFoo12wb0YnzoOLjvfD6OL3JjIUJNOmJy RCsJ5IA/Iz33RhSVRmROu+TztwuThClw63g7+hoyewv7BemKyuU6FTVhjjW+XUWmS/FzknSi dAG+insr0746cTPpSkGl3KAXeWDGJzve7/SBBfyznWCMGaf8E2P1oOdIZRxHgWj0zNr1+ooF /PzgLPiCI4OMUttTlEKChgbUTQ+5o0P080JojqfXwbPAyumbaYcQNiH1/xYbJdOFSiBv9rpt TQTBLzDKXok86M7BTQRS4TZ/ARAAkgqudHsp+hd82UVkvgnlqZjzz2vyrYfz7bkPtXaGb9H4 Rfo7mQsEQavEBdWWjbga6eMnDqtu+FC+qeTGYebToxEyp2lKDSoAsvt8w82tIlP/EbmRbDVn 7bhjBlfRcFjVYw8uVDPptT0TV47vpoCVkTwcyb6OltJrvg/QzV9f07DJswuda1JH3/qvYu0p vjPnYvCq4NsqY2XSdAJ02HrdYPFtNyPEntu1n1KK+gJrstjtw7KsZ4ygXYrsm/oCBiVW/OgU g/XIlGErkrxe4vQvJyVwg6YH653YTX5hLLUEL1NS4TCo47RP+wi6y+TnuAL36UtK/uFyEuPy wwrDVcC4cIFhYSfsO0BumEI65yu7a8aHbGfq2lW251UcoU48Z27ZUUZd2Dr6O/n8poQHbaTd 6bJJSjzGGHZVbRP9UQ3lkmkmc0+XCHmj5WhwNNYjgbbmML7y0fsJT5RgvefAIFfHBg7fTY/i kBEimoUsTEQz+N4hbKwo1hULfVxDJStE4sbPhjbsPCrlXf6W9CxSyQ0qmZ2bXsLQYRj2xqd1 bpA+1o1j2N4/au1R/uSiUFjewJdT/LX1EklKDcQwpk06Af/N7VZtSfEJeRV04unbsKVXWZAk uAJyDDKN99ziC0Wz5kcPyVD1HNf8bgaqGDzrv3TfYjwqayRFcMf7xJaL9xXedMcAEQEAAcLB XwQYAQgACQUCUuE2fwIbDAAKCRBlw/kGpdefoG4XEACD1Qf/er8EA7g23HMxYWd3FXHThrVQ HgiGdk5Yh632vjOm9L4sd/GCEACVQKjsu98e8o3ysitFlznEns5EAAXEbITrgKWXDDUWGYxd pnjj2u+GkVdsOAGk0kxczX6s+VRBhpbBI2PWnOsRJgU2n10PZ3mZD4Xu9kU2IXYmuW+e5KCA vTArRUdCrAtIa1k01sPipPPw6dfxx2e5asy21YOytzxuWFfJTGnVxZZSCyLUO83sh6OZhJkk b9rxL9wPmpN/t2IPaEKoAc0FTQZS36wAMOXkBh24PQ9gaLJvfPKpNzGD8XWR5HHF0NLIJhgg 4ZlEXQ2fVp3XrtocHqhu4UZR4koCijgB8sB7Tb0GCpwK+C4UePdFLfhKyRdSXuvY3AHJd4CP 4JzW0Bzq/WXY3XMOzUTYApGQpnUpdOmuQSfpV9MQO+/jo7r6yPbxT7CwRS5dcQPzUiuHLK9i nvjREdh84qycnx0/6dDroYhp0DFv4udxuAvt1h4wGwTPRQZerSm4xaYegEFusyhbZrI0U9tJ B8WrhBLXDiYlyJT6zOV2yZFuW47VrLsjYnHwn27hmxTC/7tvG3euCklmkn9Sl9IAKFu29RSo d5bD8kMSCYsTqtTfT6W4A3qHGvIDta3ptLYpIAOD2sY3GYq2nf3Bbzx81wZK14JdDDHUX2Rs 6+ahAA==
- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, "Xen.org security team" <security-team-members@xxxxxxx>
- Delivery-date: Tue, 10 Nov 2026 23:52:18 +0000
- List-id: "Xen announcements \(low volume\)" <xen-announce.lists.xenproject.org>
On 10/11/2026 6:00 pm, Xen.org security team wrote:
> Xen Security Advisory CVE-2024-36350,CVE-2024-36357,CVE-2026-0004 /
> XSA-525
>
> x86: Transient Scheduler Attacks (update)
>
> ISSUE DESCRIPTION
> =================
>
> AMD have discovered further properties of Transient Scheduler Attacks.
>
> The previously published XSA-471 dealt with two TSA variants, TSA-SQ
> and TSA-L1 on Zen3 and Zen4 CPUs. For details, see XSA-471.
>
> AMD had previously said that Zen5 CPUs were not vulnerable to TSA-SQ and
> TSA-L1. This statement has been corrected, and is being tracked as
> AMD-SB-7073 using the existing CVE-2024-36350 and CVE-2024-36357.
>
> AMD have also disclosed a new TSA variant, TSA-Fill, which is being
> tracked as AMD-SB-3031 and CVE-2026-0004.
>
> For more information, see:
> https://xenbits.xen.org/xsa/advisory-471.html
>
> https://www.amd.com/content/dam/amd/en/documents/resources/bulletin/technical-guidance-for-mitigating-transient-scheduler-attacks.pdf
>
> https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7073.html
>
> https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3031.html
My apologies. Both references to 3031 should have been 3055 instead.
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3055.html
~Andrew
|
