CVE-2025-37899
Published May 20, 2025
Last updated 3 months ago
AI description
CVE-2025-37899 is a use-after-free vulnerability found in the ksmbd component of the Linux kernel, which is an in-kernel server implementing the SMB3 protocol for file sharing over networks. Specifically, the vulnerability exists in the session logoff handler. The vulnerability occurs because the `sess->user` object can be freed by one thread processing a logoff command while another thread, handling a new connection's session setup request, might still be accessing the same `sess->user` object. This concurrent access can lead to memory corruption and potentially allow attackers to execute arbitrary code with kernel privileges.
- Description
- In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in session logoff The sess->user object can currently be in use by another thread, for example if another connection has sent a session setup request to bind to the session being free'd. The handler for that connection could be in the smb2_sess_setup function which makes use of sess->user.
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- NVD status
- Awaiting Analysis
Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.
- Hype score
19
Zero day in Linux kernel’s SMB (CVE-2025-37899) using LLMs (OpenAI’s o3) https://t.co/1UdtbL2MhZ Credits @seanhn #infosec #llm https://t.co/7h6OCBHHjG
@0xor0ne
26 Aug 2025
9146 Impressions
52 Retweets
242 Likes
95 Bookmarks
0 Replies
0 Quotes
How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation – Sean Heelan's Blog https://t.co/bMdPz3FNgK
@akaclandestine
22 Aug 2025
1511 Impressions
6 Retweets
25 Likes
12 Bookmarks
0 Replies
0 Quotes
Vulnerability research using LLMs (OpenAI’s o3): Zero day in Linux kernel’s SMB (CVE-2025-37899) https://t.co/1UdtbL2MhZ Credits @seanhn #infsec #llm https://t.co/XSFT3MEyIB
@0xor0ne
29 Jul 2025
9983 Impressions
59 Retweets
278 Likes
109 Bookmarks
0 Replies
1 Quote
AI Finds CVE-2025-37899 Zero-Day In Linux SMB Kernel #CISO https://t.co/ywmEF3MdHW
@compuchris
25 Jul 2025
17 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
o3 found CVE-2025-37899, a use-after-free vulnerability in Linux kernel's SMB implementation. This is test-time compute scaling in action. More runs -> higher coverage - in a bechmark run @seanhn found that o3 can find CVE-2025-37778 (kerberos auth vuln) in 8 of the 100 runs
@phbenz
4 Jul 2025
32 Impressions
0 Retweets
0 Likes
0 Bookmarks
1 Reply
0 Quotes
🔍 Using AI to Find a Linux Kernel Zero-Day Sean Heelan explains how he used OpenAI’s o3 model to uncover CVE-2025-37899. This is a remote zero-day vulnerability in the Linux kernel’s SMB implementation. He found the vulnerability using just the o3 API—no extra framewo
@GotoNathan
12 Jun 2025
114 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
🔍 Using AI to Find a Linux Kernel Zero-Day Sean Heelan explains how he used OpenAI’s o3 model to uncover CVE-2025-37899. This is a remote zero-day vulnerability in the Linux kernel’s SMB implementation. He found the vulnerability using just the o3 API—no extra framewo
@GotoNathan
12 Jun 2025
116 Impressions
0 Retweets
1 Like
1 Bookmark
0 Replies
0 Quotes
🔍 Using AI to Find a Linux Kernel Zero-Day Sean Heelan explains how he used OpenAI’s o3 model to uncover CVE-2025-37899. This is a remote zero-day vulnerability in the Linux kernel’s SMB implementation. He found the vulnerability using just the o3 API—no extra framewo
@GotoNathan
12 Jun 2025
156 Impressions
0 Retweets
2 Likes
0 Bookmarks
0 Replies
0 Quotes
🔍 Using AI to Find a Linux Kernel Zero-Day Sean Heelan explains how he used OpenAI’s o3 model to uncover CVE-2025-37899. This is a remote zero-day vulnerability in the Linux kernel’s SMB implementation. He found the vulnerability using just the o3 API—no extra framewo
@GotoNathan
12 Jun 2025
116 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
LLM (OpenAI’s o3) for vulnerability research. Zero day in Linux kernel’s SMB (CVE-2025-37899) https://t.co/1UdtbL2MhZ Credits @seanhn #infsec #llm https://t.co/4Tsa3nFxLO
@0xor0ne
12 Jun 2025
10416 Impressions
60 Retweets
227 Likes
91 Bookmarks
1 Reply
0 Quotes
#exploit 1. CVE-2025-32756: https://t.co/1w8oAjYxV0 Fortinet (FortiVoice, FortiMail, FortiNDR, FortiRecorder, FortiCamera) Stack-based BoF 2. CVE-2025-49223: https://t.co/0HK0aFCF70 Prototype Pollution in Billboard.js 3. CVE-2025-37899: https://t.co/RnMzAPQJjW Linux kernel SMB
@ksg93rd
8 Jun 2025
1165 Impressions
4 Retweets
14 Likes
9 Bookmarks
1 Reply
0 Quotes
🚩 AI Discovers Linux Kernel SMB Zero-Day Vulnerability CVE-2025-37899 https://t.co/cKh8aMKJ8A A critical use-after-free vulnerability (CVE-2025-37899) in the Linux kernel's ksmbd module was uncovered using OpenAI's o3 language model. The flaw arises when multiple threads
@Huntio
6 Jun 2025
583 Impressions
4 Retweets
14 Likes
2 Bookmarks
0 Replies
0 Quotes
What if we could codify expert reasoning and scale it? @seanheelan’s latest work using the O3 reasoning model led to the discovery of CVE-2025-37899—a remote Linux kernel SMB zero-day. A standout example of intelligence amplification in action. https://t.co/sIdSOu6tBg https:
@nuroshift
6 Jun 2025
39 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Great example of the power of @OpenAI's o3 model. o3 spotted a CVE-2025-37899, a remote zero-day use-after-free bug in the Linux kernel’s SMB (ksmbd) implementation by reasoning across12,000 lines of code. ⚙️ The Core Concepts Use-after-free appears when freed memory is
@rohanpaul_ai
4 Jun 2025
3709 Impressions
6 Retweets
24 Likes
12 Bookmarks
1 Reply
0 Quotes
How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation https://t.co/64aIViHRgW #security #cybersecurity
@eyalestrin
2 Jun 2025
19 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
chatgpt нашел уязвимость в Linux, неделю назад ⚠️ Модель o3 OpenAI обнаружила уязвимость (CVE-2025-37899) в модуле ksmbd ядра Linux была, позволяющая выполнять код на уровне я
@warnetik
1 Jun 2025
34 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Believe it or not, #OpenAI's o3 just uncovered a remote 0-day in the #Linux #kernel's SMB code—CVE-2025-37899. A patch has already been rolled out. https://t.co/EfMN8eHpf5
@linuxiac
29 May 2025
1406 Impressions
16 Retweets
64 Likes
3 Bookmarks
1 Reply
1 Quote
AI Discovers Zero-Day Vulnerability in Linux Kernel 🚨 OpenAI's o3 model just made cybersecurity history by discovering CVE-2025-37899 - a critical zero-day vulnerability buried deep in Linux kernel's SMB implementation. What makes this groundbreaking? ✅ o3 analyzed 12,000+
@simbianai
29 May 2025
52 Impressions
0 Retweets
2 Likes
0 Bookmarks
1 Reply
0 Quotes
How OpenAI’s o3 Model was used to find zeroday Vulnerability in the Linux kernel (CVE-2025-37899 for the SMB implementation) - Blog post by Sean Heelan @seanhn #LLM #Cybersecurity https://t.co/hg0JHdzfGu
@lcheylus
28 May 2025
146 Impressions
2 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Un chercheur en sécurité a identifié la vulnérabilité CVE-2025-37899 dans le noyau Linux grâce à l’IA. 👉 https://t.co/IDLQSMPp1L 👉 La CVE : https://t.co/Zo8VF9YzRi https://t.co/CH4Oe65poV
@bearstech
28 May 2025
1626 Impressions
5 Retweets
18 Likes
7 Bookmarks
0 Replies
0 Quotes
La IA demuestra su potencial en #ciberseguridad: usando OpenAI, se descubrió la vulnerabilidad zero-day CVE-2025-37899 en la implementación SMB del kernel de Linux. Los modelos de lenguaje ya pueden identificar fallos complejos y acelerar este trabajo https://t.co/j90kOG49u7 h
@henryraul
28 May 2025
220 Impressions
11 Retweets
7 Likes
1 Bookmark
0 Replies
0 Quotes
o3によるCVE-2025-37899発見の解析と解説 https://t.co/DFzmxNbMpW
@GithubMatome
28 May 2025
25 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
🚨 OpenAI’s new o3 model just helped spot a zero-day Linux kernel bug (CVE-2025-37899) — no tools, just code + prompts. 🔍🐧 Researcher Sean Heelan used o3 to uncover a use-after-free vulnerability with kernel-level impact. AI + cybersecurity = real-world breakthrough
@moaijobs
27 May 2025
55 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
ショーン・ヒーラン氏が「OpenAI o3」を使ってLinuxカーネルサーバー「ksmbd」のゼロデイ脆弱性を発見！正式に「CVE-2025-37899」として報告される https://t.co/IjK0IryqO4 @nikkeimatomeより
@nikkeimatome
27 May 2025
66 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Zero-day vulnerability in Linux kernel SMB discovered via ChatGPT CVE-2025-37899 #UPDATE https://t.co/6OOM0uVaGw
@JadenJohnsNews
26 May 2025
6 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Vulnerabilidad de día cero en SMB del kernel de Linux descubierta mediante ChatGPT CVE-2025-37899 https://t.co/9cRF5dUzW3 https://t.co/epjijWu26j
@elhackernet
26 May 2025
20448 Impressions
127 Retweets
422 Likes
109 Bookmarks
4 Replies
2 Quotes
Using only OpenAI’s new o3 model, researcher Sean Heelan uncovered CVE-2025-37899 — a high-risk use-after-free flaw in the Linux kernel’s ksmbd module. The AI identified the bug without any extra tools, showcasing the power of LLMs in accelerating vulnerability research. ht
@deeptechstars
26 May 2025
46 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Artificial intelligence is helping with #cybersecurity How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation – Sean Heelan's Blog https://t.co/EM35479Ei9
@MHiesboeck
26 May 2025
694 Impressions
0 Retweets
4 Likes
1 Bookmark
1 Reply
0 Quotes
OpenAI's o3 API Helps Find Linux Zero-Day Vulnerability A security researcher details how he used OpenAI's o3 API to find a zero-day vulnerability (CVE-2025-37899) in the Linux kernel's SMB implementation by analyzing code. #OpenAI #Security #Linux https://t.co/6PHf7Lw6ek
@AI_Techie_Arun
26 May 2025
63 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel's SMB implementation https://t.co/Mu2xcIgseB
@TimCohn
26 May 2025
5 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
o3独立发现了Linux的0-day漏洞 (CVE-2025-37899) 看起来在量子计算实现之前，似乎只有实体资产和离线冷钱包是真正安全的资产，其他的数字和产权类资产都有重大风险。
@iamai_eth
25 May 2025
1070 Impressions
1 Retweet
7 Likes
2 Bookmarks
0 Replies
0 Quotes
https://t.co/gx76MCZz2V - 使用OpenAI的o3模型找到Linux核心SMB實作的零日漏洞CVE-2025-37899。 - 該漏洞是SMB 'logoff'指令處理器中的Use-After-Free。 - o3成功分析並找出漏洞，展現其程式碼推理能力。 - o3也協助找到另一個相似的
@Evan_Lin
25 May 2025
677 Impressions
4 Retweets
8 Likes
1 Bookmark
0 Replies
1 Quote
https://t.co/iGMVuOYh5e “How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation”
@TheRealAdamG
25 May 2025
4468 Impressions
5 Retweets
89 Likes
14 Bookmarks
4 Replies
0 Quotes
How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation – Sean Heelan's Blog https://t.co/AeCCzfkZeH
@rocky2rockz4
25 May 2025
27 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
#OpenAI's o3 model independently discovered a Linux kernel SMB zero-day vulnerability (CVE-2025-37899) 😱! No complex tools needed—just API code analysis, and its fix even outperformed humans 👏. A new era of AI security testing? https://t.co/j0Gqusj69w
@dlimeng192048
25 May 2025
39 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
最近独立研究员Seen Heelan用OpenAI的o3模型发现了Linux内核的远程零日漏洞CVE-2025-37899，还是首次由大语言模型独立发现的内核级漏洞 仅用o3的API，检查12000行代码100次就揪出了“释放后使用”漏洞，还能给出超棒的
@daizhe9898
25 May 2025
63 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
この記事をおすすめしました "How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation" via @techfeedapp #techfeed https://t.co/elTLtQVUW9
@yume_piece1010
25 May 2025
62 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation https://t.co/FyrGqQiiln
@yousukezan
25 May 2025
2528 Impressions
1 Retweet
13 Likes
8 Bookmarks
0 Replies
0 Quotes
CVE-2025-37899 revealed via O3: a significant Linux kernel SMB RCE. Real-world impact underscores O3's capability in automating complex vulnerability discovery. Expect higher scrutiny on kernel security while automated tools gain credibility. https://t.co/zX7wgRAZLv
@0xOnlyCalls
25 May 2025
125 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
Security researcher Sean Heelan used OpenAI’s o3 model to discover a critical zero-day (CVE-2025-37899) in the Linux kernel’s SMB server. o3 flagged a race condition leading to a use-after-free bug showing how AI can now spot real, complex vulns in kernel code.
@sharathnryn
25 May 2025
53 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
Security researcher Sean Heelan used OpenAI’s o3 model to discover a critical zero-day (CVE-2025-37899) in the Linux kernel’s SMB server. o3 flagged a race condition leading to a use-after-free bug — showing how AI can now spot real, complex vulns in kernel code.
@sharathnryn
25 May 2025
8 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
OPENAI’S O3 UNCOVERS LINUX ZERO-DAY FLAW! A researcher used OpenAI’s o3 model to discover CVE-2025-37899, a critical remote zero-day vulnerability in the Linux kernel’s SMB, showcasing AI’s power in cybersecurity. #AI https://t.co/s0c0fXtvXT
@ai_24x7
25 May 2025
52 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
【ニュース速報：Tech blogs】2025-05-25 1. 私がo3を使用して、LinuxカーネルのSMB実装におけるリモートゼロデイ脆弱性CVE-2025-37899を発見した方法について説明します。 https://t.co/ndzCPyRE1X 2. f2 https://t.co/qLxDZkcxzb #T
@Masato1864646
25 May 2025
41 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
LinuxカーネルのSMB実装にゼロデイ脆弱性（CVE-2025-37899）が発見されたんだけど、実はOpenAIのLLM「o3」が見つけたんだよ。AIが並列処理の危険なバグを人間より先に発見したってことで、セキュリティ分野に衝撃
@techandeco4242
25 May 2025
82 Impressions
1 Retweet
1 Like
0 Bookmarks
0 Replies
0 Quotes
Linux kernel vulnerability found using o3. The vulnerability CVE-2025-37899, a use-after-free in the handler for the SMB ‘logoff’ command was found by training o3. Understanding the vulnerability requires reasoning about concurrent connections to the server, and how they may
@mukulneetika
25 May 2025
450 Impressions
0 Retweets
2 Likes
0 Bookmarks
0 Replies
1 Quote
【ニュース速報：Tech blogs】2025-05-25 1. 私がo3を使用して、LinuxカーネルのSMB実装におけるリモートゼロデイ脆弱性CVE-2025-37899を見つけた方法について説明します。 https://t.co/ndzCPyRE1X 2. f2 https://t.co/qLxDZkcxzb #T
@Masato1864646
25 May 2025
40 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Unlocking vulnerabilities with AI: A deep dive into how the o3 model identified CVE-2025-37899— a zero-day in Linux's SMB implementation. Key takeaways: - Methodical engineering practices and thoughtful prompt design are essential for effective vulnerability detection. - Th
@TechRandomizer
24 May 2025
38 Impressions
0 Retweets
0 Likes
1 Bookmark
1 Reply
0 Quotes
この記事をおすすめしました "How I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation" via @techfeedapp #techfeed https://t.co/GaqdvpFYAf
@hossuii
24 May 2025
57 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
2025. május 22-én Sean Hn bejelentette, hogy az OpenAI o3 modelljének segítségével egy eddig ismeretlen, távoli zeroday sebezhetőséget (CVE-2025-37899) fedezett fel a Linux-kernel SMB-implementációjában. https://t.co/qvOxzvotWS
@PingvinBazis
24 May 2025
25 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
Jak jsem pomocí o3 nalezl CVE-2025-37899, tj. vzdálenou 0-day zranitelnost v Linuxu v SMB https://t.co/ZZLTEqJGQ3
@abclinuxu
24 May 2025
141 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes