Jump-over-ASLR-BTB

分岐予測子 & ASLR 著者: Byte Reaper 説明 このリポジトリには、アドレス空間配置のランダム化（ASLR）の文脈における分岐予測子、投機的実行、キャッシュベースのサイドチャネルに関連する概念を示す研究用C実装が含まれています。 必要条件 : root@kitploit: Linux x8664 GCC CPU that supports BTB ビルド : root@kitploit: gcc btb.c -o BTB ./BTB クイック出力（例）: root@kitploit: + check System Security for Check branch...

CVE-2021-33624

CVE-2021-33624 の概念実証 コンパイル方法 gcc -pthread -o bpfspectretypeconfusion bpfspectretypeconfusion.c -Wall -ggdb -std=gnu99 実行方法 sudo ./bpfspectretypeconfusion 1 2 ffffffffa4925620 0x10 ここで、1 と 2 は異なるハードウェアコアで動作する CPU スレッド、ffffffffa4925620 は漏洩させたい対象メモリ、0x10 は漏洩させるバイト数です。このエクスプロイトは修正されていますが、sudo...

CVE-2023-0045

Linux における Spectre-BTI ユーザー空間緩和策の回避 これは作業中のドキュメントです。誤りがあると思われる場合や引用漏れがある場合は、フィードバックをお送りください。 バージョン 1.0 José Oliveira esoj Rodrigo Branco BSDaemon はじめに Spectre-BTI攻撃の成功率をテストした際、カーネルAPIを緩和策として使用したときに奇妙なパターンを検出しました1。私たちのテストにより、Linuxカーネルが攻撃を正しく緩和できず、syscall後にプロセスが短時間露出したままになることが明らかになりました。...

spectre-attack-example

Spectre 攻撃の例 2018年1月2日 CVE-2017-5753 および CVE-2017-5715 「ゴースト」Spectre 脆弱性の悪用例 これは何か？ メモリにテキスト "The Magic Words are Squeamish Ossifrage." を配置し、脆弱性を利用して読み出そうとします。システムが脆弱であれば、標準出力に同じテキストが表示されます。 このコードでは、victimfunction 内のコンパイル命令が厳密なプログラム順に実行されると、array1size = 16 のため、関数は array10..15...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: x86/vmscape: Added conditional IBPB mitigation VMSCAPE is a vulnerability that exploits insufficient branch predictor isolation between a guest and a userspace hypervisor such as QEMU. Existing mitigations already protect the...

Astra Linux – Vulnerability in Linux, Linux 5.10

The non-transparent sharing of the branch predictor within the context of some Intel processors may allow an authorized user to potentially enable information disclosure through local access...

Astra Linux – Vulnerability in Linux, Linux 5.10

The non-transparent sharing of branch predictor selectors between contexts in some Intel processors may allow an authorized user to potentially enable information disclosure through local access...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ibprctlset function updates the Thread Information Flags TIFs for the task and updates the SPECCTRL MSR in the function speculationctrlupdate, but the IBPB is only issued at the next schedul...

Astra Linux – Vulnerability in Linux 5.15, Linux

Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type, potentially leading to information disclosure...

ROS-20260904-73-0001

The vulnerabilities of the Branch Target Buffer BTB and Indirect Branch Predictor IBP in Intel microprogramming devices stem from the state of the race within the pipeline. Exploiting these vulnerabilities can allow attackers to disclose protected information by executing specially crafted...

CVE-2026-64507

A flaw was found in the Linux kernel. This vulnerability involves an incomplete defense against Spectre-v2, a type of attack that can expose sensitive information by exploiting how modern processors predict future operations. Specifically, when the Berkeley Packet Filter BPF Just-In-Time JIT...

SUSE CVE-2026-64508

In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is...

CVE-2026-64508

In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is...

AZL-93857 CVE-2026-64508 affecting package kernel for versions less than 6.6.145.2-1

In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is...

UBUNTU-CVE-2026-64508

In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is...

CVE-2026-64508 bpf: Support for hardening against JIT spraying

In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is...

CVE-2026-64508

CVE-2026-64508 relates to a Linux kernel vulnerability in BPF JIT memory reuse. The issue arises when the BPF JIT allocator reuses space for new programs, potentially letting indirect jumps reuse stale branch predictions. Fix implemented: flush indirect branch predictors on JIT memory reuse via a...

CVE-2026-64508

In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is...

CVE-2026-64508 bpf: Support for hardening against JIT spraying

In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is...

CVE-2026-64507 x86/bugs: Enable IBPB flush on BPF JIT allocation

In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Enable IBPB flush on BPF JIT allocation Enable hardening against JIT spraying when Spectre-v2 mitigations are in use. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip enabling the IBPB flush if the BPF...