net: skbuff: propagate shared-frag marker through frag-transfer helpers
Title source: cnaExploitation Summary
EIP tracks 14 public exploits for CVE-2026-46300. PoCs published by nu11secur1ty, Unclecheng-li, 0xBlackash.
AI-analyzed exploit summary The provided content describes a Linux kernel privilege escalation exploit chain but lacks actual exploit code. It references external links (Patreon, GitHub) for the exploit and patch, which is characteristic of suspicious repositories.
Description
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.
Exploits (14)
The provided content describes a Linux kernel privilege escalation exploit chain but lacks actual exploit code. It references external links (Patreon, GitHub) for the exploit and patch, which is characteristic of suspicious repositories.
This repository contains a functional exploit for CVE-2026-46300, a Linux kernel local privilege escalation vulnerability. The exploit leverages page cache replacement via ESP-in-TCP/TCP coalesce to achieve byte-controlled pollution, allowing an attacker to modify the page cache of a read-only file (e.g., /usr/bin/su) to execute arbitrary code with elevated privileges.
The repository contains a functional local privilege escalation exploit for CVE-2026-46300, leveraging a logic flaw in the Linux kernel's socket buffer handling within the XFRM/ESP-in-TCP subsystem to achieve arbitrary byte writes in the kernel page cache.
This PoC demonstrates a local privilege escalation (LPE) exploit leveraging Linux namespace isolation (CLONE_NEWUSER and CLONE_NEWNET) to gain root access. It uses unshare() to create new user and network namespaces, then spawns a shell with elevated privileges.
This repository documents the analysis of CVE-2026-46300, a Linux kernel page-cache corruption vulnerability that allows local privilege escalation by modifying cached file pages without altering the underlying disk files. The content appears to be a technical writeup based on a TryHackMe lab project.
This repository contains a functional Go-based exploit for CVE-2026-46300, leveraging a kernel page-cache write primitive via TCP_ULP espintcp to achieve local privilege escalation (LPE). The exploit builds a keystream table for AES-GCM decryption, flips bytes in the page cache of /usr/bin/su, and spawns a root shell via a PTY.
This repository contains a functional exploit PoC for CVE-2026-46300, demonstrating a kernel memory corruption vulnerability via TCP_ULP setsockopt and namespace escape techniques. The exploit includes a Docker-based test environment to simulate both mitigated and unmitigated scenarios.
This repository contains a functional simulation of CVE-2026-46300, a privilege escalation vulnerability in Cisco Secure Command Center. The exploit leverages a logical flaw in the espintcp module to corrupt file-backed page cache, leading to arbitrary code execution with root privileges.
This repository contains a functional Go exploit for CVE-2026-46300, leveraging a Linux kernel vulnerability in the XFRM ESP-in-TCP subsystem to achieve local privilege escalation (LPE). The exploit uses a controlled single-byte write primitive via AES-GCM decryption in the page cache to overwrite /usr/bin/su with a root shell payload.
This repository contains a functional Go-based exploit for CVE-2026-46300, leveraging a Linux kernel vulnerability in the XFRM ESP-in-TCP subsystem to achieve local privilege escalation (LPE). The exploit uses a controlled single-byte write primitive via AES-GCM decryption in-place on page-cache pages, allowing arbitrary code execution as root.
This repository contains a Go-based tool that mitigates CVE-2026-43500 and CVE-2026-43284 by disabling vulnerable kernel modules (esp4, esp6, rxrpc) and applying kernel updates. It includes functionality to detect vulnerable modules, apply hotfixes, and clean up artifacts post-update.
This repository provides a detailed technical analysis of CVE-2026-46300, a local privilege escalation vulnerability in the Linux kernel's XFRM ESP-in-TCP subsystem. It includes root cause analysis, patch information, and remediation steps but does not contain exploit code.
The repository contains no actual exploit code, only a README with instructions to clone and run a non-existent 'exploit' file. This is a social engineering lure designed to trick users into downloading external content.
This repository contains a functional local privilege escalation (LPE) exploit for CVE-2026-46300, targeting a logic bug in the Linux XFRM ESP-in-TCP subsystem. The exploit achieves arbitrary byte writes into the kernel page cache of read-only files by manipulating the ESP-in-TCP ULP mode transition and AES-GCM keystream bytes.
References (19)
Scores
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H