It's always a bug to use RDRAND or RDSEED from Linux userspace. Use getrandom(). I will die on this hill.
November 8, 2025 at 5:47 PM
It's always a bug to use RDRAND or RDSEED from Linux userspace. Use getrandom(). I will die on this hill.
Chipmaker AMD has confirmed a major security bug in the RDSEED entropy generator impacting Zen 5 processors.
The RDSEED process has been failing to produce random numbers on Linux systems.
AMD is planning to release patches through November for all affected CPU models.
www.amd.com/en/resources...
The RDSEED process has been failing to produce random numbers on Linux systems.
AMD is planning to release patches through November for all affected CPU models.
www.amd.com/en/resources...
November 4, 2025 at 5:28 PM
Chipmaker AMD has confirmed a major security bug in the RDSEED entropy generator impacting Zen 5 processors.
The RDSEED process has been failing to produce random numbers on Linux systems.
AMD is planning to release patches through November for all affected CPU models.
www.amd.com/en/resources...
The RDSEED process has been failing to produce random numbers on Linux systems.
AMD is planning to release patches through November for all affected CPU models.
www.amd.com/en/resources...
-CryLock couple profile
-Zendesk email bomb attacks
-20 ASNs responsible for most brute-force badness
-Lumma operators get doxxed
-APT35 linked to Shuhada base in Tehran
-AMD RDSEED vulnerability
-Dolby 0-click vuln
-ConnectWise security update
-SimpleHelp RCE
-Companies are getting deputy CISOs
-Zendesk email bomb attacks
-20 ASNs responsible for most brute-force badness
-Lumma operators get doxxed
-APT35 linked to Shuhada base in Tehran
-AMD RDSEED vulnerability
-Dolby 0-click vuln
-ConnectWise security update
-SimpleHelp RCE
-Companies are getting deputy CISOs
October 20, 2025 at 7:54 AM
-CryLock couple profile
-Zendesk email bomb attacks
-20 ASNs responsible for most brute-force badness
-Lumma operators get doxxed
-APT35 linked to Shuhada base in Tehran
-AMD RDSEED vulnerability
-Dolby 0-click vuln
-ConnectWise security update
-SimpleHelp RCE
-Companies are getting deputy CISOs
-Zendesk email bomb attacks
-20 ASNs responsible for most brute-force badness
-Lumma operators get doxxed
-APT35 linked to Shuhada base in Tehran
-AMD RDSEED vulnerability
-Dolby 0-click vuln
-ConnectWise security update
-SimpleHelp RCE
-Companies are getting deputy CISOs
The Linux kernel has patched a bug in the RDSEED entropy generator that caused AMD Zen5 chips to fail to produce random numbers.
The patch disables RDSEED and forces all AMD Zen5 processors to use RDRAND for generating random numbers.
lore.kernel.org/lkml/2025101...
The patch disables RDSEED and forces all AMD Zen5 processors to use RDRAND for generating random numbers.
lore.kernel.org/lkml/2025101...
October 19, 2025 at 2:47 PM
The Linux kernel has patched a bug in the RDSEED entropy generator that caused AMD Zen5 chips to fail to produce random numbers.
The patch disables RDSEED and forces all AMD Zen5 processors to use RDRAND for generating random numbers.
lore.kernel.org/lkml/2025101...
The patch disables RDSEED and forces all AMD Zen5 processors to use RDRAND for generating random numbers.
lore.kernel.org/lkml/2025101...
Updated Linux Patch Would Disable RDSEED For All AMD Zen 5 CPUs - https://www.phoronix.com/news/RDSEED-Disable-All-Zen-5
Updated Linux Patch Would Disable RDSEED For All AMD Zen 5 CPUs
A few days back we reported on a Meta engineer uncovering an architectural issue with RDSEED usage on AMD EPYC 9005 "Turin" CPUs. It ended up being found to affect more CPU models than originally anticipated and a new patch posted to the Linux kernel mailing list would disable RDSEED usage across all AMD Zen 5 processors...
www.phoronix.com
October 18, 2025 at 10:59 AM
Updated Linux Patch Would Disable RDSEED For All AMD Zen 5 CPUs - https://www.phoronix.com/news/RDSEED-Disable-All-Zen-5
Meta Uncovers RDSEED Architectural Issue In AMD EPYC Zen 5 CPUs - https://www.phoronix.com/news/AMD-EPYC-Turin-RDSEED-Bug
Meta Uncovers RDSEED Architectural Issue In AMD EPYC Zen 5 CPUs
Over the years we have seen various workarounds like disabling RDSEED for select AMD CPUs due to hardware bugs and early on in the Zen days were also some RdRand issues due to different problems. It turns out the newest AMD EPYC 5th Gen "Turin" processors have a new RDSEED issue...
www.phoronix.com
October 16, 2025 at 6:59 PM
Meta Uncovers RDSEED Architectural Issue In AMD EPYC Zen 5 CPUs - https://www.phoronix.com/news/AMD-EPYC-Turin-RDSEED-Bug
Re: [PATCH v2 1/1] x86/rdrand: disable RDSEED on AMD Cyan Skillfish Borislav Petkov writes: (Summ...
http://lkml.org/lkml/2025/5/24/253
Result Details
http://lkml.org/lkml/2025/5/24/253
Result Details
Awakari App
awakari.com
May 24, 2025 at 5:13 PM
Re: [PATCH v2 1/1] x86/rdrand: disable RDSEED on AMD Cyan Skillfish Borislav Petkov writes: (Summ...
http://lkml.org/lkml/2025/5/24/253
Result Details
http://lkml.org/lkml/2025/5/24/253
Result Details
AMD Errata: RDSEED failure on AMD Zen 5 Processors
L: https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7055.html
C: https://news.ycombinator.com/item?id=45799816
posted on 2025.11.03 at 10:05:14 (c=1, p=4)
L: https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7055.html
C: https://news.ycombinator.com/item?id=45799816
posted on 2025.11.03 at 10:05:14 (c=1, p=4)
November 3, 2025 at 3:13 PM
AMD Errata: RDSEED failure on AMD Zen 5 Processors
L: https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7055.html
C: https://news.ycombinator.com/item?id=45799816
posted on 2025.11.03 at 10:05:14 (c=1, p=4)
L: https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7055.html
C: https://news.ycombinator.com/item?id=45799816
posted on 2025.11.03 at 10:05:14 (c=1, p=4)
📰 Bug Serius di AMD “Zen 5” RDSEED Dapat Melemahkan Keamanan Kriptografi
👉 Baca artikel lengkap di sini: https://ahmandonk.com/2025/11/04/amd-zen5-rdseed-bug-cryptographic-key-risk/
#agesa #am#agesap#amda#cryptography-#cve6 #firmware-#firmwaredseed #s#rdseed #securityi#vulnerabilityref="/hashtag/zen5" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#zen5
👉 Baca artikel lengkap di sini: https://ahmandonk.com/2025/11/04/amd-zen5-rdseed-bug-cryptographic-key-risk/
#agesa #am#agesap#amda#cryptography-#cve6 #firmware-#firmwaredseed #s#rdseed #securityi#vulnerabilityref="/hashtag/zen5" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#zen5
November 4, 2025 at 2:03 AM
📰 Bug Serius di AMD “Zen 5” RDSEED Dapat Melemahkan Keamanan Kriptografi
👉 Baca artikel lengkap di sini: https://ahmandonk.com/2025/11/04/amd-zen5-rdseed-bug-cryptographic-key-risk/
#agesa #am#agesap#amda#cryptography-#cve6 #firmware-#firmwaredseed #s#rdseed #securityi#vulnerabilityref="/hashtag/zen5" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#zen5
👉 Baca artikel lengkap di sini: https://ahmandonk.com/2025/11/04/amd-zen5-rdseed-bug-cryptographic-key-risk/
#agesa #am#agesap#amda#cryptography-#cve6 #firmware-#firmwaredseed #s#rdseed #securityi#vulnerabilityref="/hashtag/zen5" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#zen5
AMD Acknowledges RDSEED Failure On AMD Zen 5 With Software Fix Coming - https://www.phoronix.com/news/AMD-SB-7055-RDSEED-Zen-5
AMD Acknowledges RDSEED Failure On AMD Zen 5 With Software Fix Coming
In mid-October a Meta engineer uncovered an RDSEED architectural issue with AMD Zen 5 CPUs. A patch in turn was sent out to the Linux kernel mailing list to disable RDSEED usage on affected Zen 5 processors. AMD this week issued a security bulletin to acknowledge the issue and report that a microcode fix is coming...
www.phoronix.com
November 1, 2025 at 10:36 AM
AMD Acknowledges RDSEED Failure On AMD Zen 5 With Software Fix Coming - https://www.phoronix.com/news/AMD-SB-7055-RDSEED-Zen-5
AMD Zen 5 processors face a critical RDSEED vulnerability compromising random number generation, impacting encryption and security protocols. #CyberSecurity #AMD #RDSEEDVulnerability Link: thedailytechfeed.com/critical-vul...
November 5, 2025 at 4:03 PM
AMD Zen 5 processors face a critical RDSEED vulnerability compromising random number generation, impacting encryption and security protocols. #CyberSecurity #AMD #RDSEEDVulnerability Link: thedailytechfeed.com/critical-vul...
RDSEED Failure on AMD “Zen 5” Processors (CVE-2025-62626) #patchmanagement
RDSEED Failure on AMD “Zen 5” Processors (CVE-2025-62626)
Eyal Estrin
unread,
12:28 AM (1 hour ago)
to
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7055.html
Eyal Estrin
CISSP, CCSP, CISM, CISA, CDPSE, CCSK
Blog: https://security-24-7.com | Books: https://amzn.to/42Xai9A | https://amzn.to/3Sggbtv
Twitter: @eyalestrin | Bluesky: @eyalestrin.bsky.social
groups.google.com
November 5, 2025 at 8:00 AM
RDSEED Failure on AMD “Zen 5” Processors (CVE-2025-62626) #patchmanagement
[PATCH v2 1/1] x86/rdrand: disable RDSEED on AMD Cyan Skillfish Mikhail Paulyshka writes: (Summar...
http://lkml.org/lkml/2025/5/24/235
Result Details
http://lkml.org/lkml/2025/5/24/235
Result Details
Awakari App
awakari.com
May 24, 2025 at 3:40 PM
[PATCH v2 1/1] x86/rdrand: disable RDSEED on AMD Cyan Skillfish Mikhail Paulyshka writes: (Summar...
http://lkml.org/lkml/2025/5/24/235
Result Details
http://lkml.org/lkml/2025/5/24/235
Result Details
AMD potwierdza krytyczną wadę RDSEED w procesorach Zen 5 Firma AMD potwierdziła lukę w zabezpieczeniach instrukcji RDSEED w swoich procesorach opartych na Zen 5, oznaczoną jako AMD-SB-7055któ...
#Cybersecurity #News #AMD #AMD-SB-7055
Origin | Interest | Match
#Cybersecurity #News #AMD #AMD-SB-7055
Origin | Interest | Match
November 4, 2025 at 11:36 AM
AMD potwierdza krytyczną wadę RDSEED w procesorach Zen 5 Firma AMD potwierdziła lukę w zabezpieczeniach instrukcji RDSEED w swoich procesorach opartych na Zen 5, oznaczoną jako AMD-SB-7055któ...
#Cybersecurity #News #AMD #AMD-SB-7055
Origin | Interest | Match
#Cybersecurity #News #AMD #AMD-SB-7055
Origin | Interest | Match
[PATCH v2 1/1] x86/rdrand: disable RDSEED on AMD Cyan Skillfish Mikhail Paulyshka writes: (Summary) 1 + 3 files changed, 11 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index e7d2f460fcc6..2333f4e7bc2f 1...
| Details | Interest | Feed |
| Details | Interest | Feed |
Origin
lkml.org
May 24, 2025 at 3:38 PM
AMD Akui Ada Bug RDSEED di CPU Zen 5, Apa Itu? - https://www.jagatreview.com/2025/11/amd-bug-rdseed-di-cpu-zen-5/
AMD Akui Ada Bug RDSEED di CPU Zen 5, Apa Itu? • Jagat Review
AMD baru-baru ini mengonfirmasi adanya bug serius pada CPU berbasis arsitektur Zen 5 yang berkaitan dengan fungsi generator angka acak perangkat keras, atau
www.jagatreview.com
November 4, 2025 at 8:44 AM
AMD Akui Ada Bug RDSEED di CPU Zen 5, Apa Itu? - https://www.jagatreview.com/2025/11/amd-bug-rdseed-di-cpu-zen-5/
Visualised AMD-SB-7055 issue on a #Zen5 #AMD #Ryzen 9 9950X. The zeroed #RDSEED rate can exceed the 3% under concurrent execution...
www.amd.com/en/resources...
www.amd.com/en/resources...
November 7, 2025 at 10:38 AM
Visualised AMD-SB-7055 issue on a #Zen5 #AMD #Ryzen 9 9950X. The zeroed #RDSEED rate can exceed the 3% under concurrent execution...
www.amd.com/en/resources...
www.amd.com/en/resources...
AMD Zen 5 Processors RDSEED Vulnerability breaks Integrity with Randomness:
cybersecuritynews.com/amd-zen-5-rd...
cybersecuritynews.com/amd-zen-5-rd...
November 4, 2025 at 6:52 AM
AMD Zen 5 Processors RDSEED Vulnerability breaks Integrity with Randomness:
cybersecuritynews.com/amd-zen-5-rd...
cybersecuritynews.com/amd-zen-5-rd...
AMD Zen 5 Processors RDSEED Vulnerability Breaks Integrity With Randomness
AMD Zen 5 Processors RDSEED Vulnerability Breaks Integrity With Randomness
cybersecuritynews.com
November 4, 2025 at 4:49 AM
AMD Zen 5 Processors RDSEED Vulnerability Breaks Integrity With Randomness
AMD Zen5プロセッサに重大なセキュリティ脆弱性「RDSEED」
暗号鍵の予測可能性で深刻な懸念広がる
わかりやすく詳細を徹底解説❗️ご視聴はこちら👇
www.youtube.com/watch?v=RT2h...
AMD Zen 5 processors suffer from a critical security vulnerability called "RDSEED,"
raising serious concerns about predictable encryption keys.
CPU 乱数生成
暗号鍵の予測可能性で深刻な懸念広がる
わかりやすく詳細を徹底解説❗️ご視聴はこちら👇
www.youtube.com/watch?v=RT2h...
AMD Zen 5 processors suffer from a critical security vulnerability called "RDSEED,"
raising serious concerns about predictable encryption keys.
CPU 乱数生成
AMD Zen 5プロセッサに重大なセキュリティ脆弱性「RDSEED」暗号鍵の予測可能性で深刻な懸念広がる/CPU・セキュリティー
YouTube video by 情報の灯台【パソコン】ソース有り
www.youtube.com
November 5, 2025 at 12:00 AM
AMD Zen5プロセッサに重大なセキュリティ脆弱性「RDSEED」
暗号鍵の予測可能性で深刻な懸念広がる
わかりやすく詳細を徹底解説❗️ご視聴はこちら👇
www.youtube.com/watch?v=RT2h...
AMD Zen 5 processors suffer from a critical security vulnerability called "RDSEED,"
raising serious concerns about predictable encryption keys.
CPU 乱数生成
暗号鍵の予測可能性で深刻な懸念広がる
わかりやすく詳細を徹底解説❗️ご視聴はこちら👇
www.youtube.com/watch?v=RT2h...
AMD Zen 5 processors suffer from a critical security vulnerability called "RDSEED,"
raising serious concerns about predictable encryption keys.
CPU 乱数生成
Generátor náhodných čísel založený na instrukcích RDSEED a RDRAND
Generátor náhodných čísel založený na instrukcích RDSEED a RDRAND
V informatice existuje několik oblastí, ve kterých je nutné používat generátory náhodných nebo alespoň pseudonáhodných hodnot. Moderní procesory s architekturou x86–64 pro tento účel nabízí instrukce RDRAND a RDSEED.
www.root.cz
August 13, 2025 at 10:05 PM
Generátor náhodných čísel založený na instrukcích RDSEED a RDRAND
random: fenestrasX: add RDSEED support Reviewed by: cem Fixes: 3a1298 random: add RDSEED as a provably unique entropy source Differential Revision: https://reviews.freebsd.org/D53291
Interest | Match | Feed
Interest | Match | Feed
Origin
cgit.freebsd.org
October 23, 2025 at 5:55 PM