CVE-2026-43284

Published: Mag 08, 2026 Last Modified: Mag 08, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,8
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector: local
Attack Complexity: high
Privileges Required: low
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

In the Linux kernel, the following vulnerability has been resolved:

xfrm: esp: avoid in-place decrypt on shared skb frags

MSG_SPLICE_PAGES can attach pages from a pipe directly to an skb. TCP
marks such skbs with SKBFL_SHARED_FRAG after skb_splice_from_iter(),
so later paths that may modify packet data can first make a private
copy. The IPv4/IPv6 datagram append paths did not set this flag when
splicing pages into UDP skbs.

That leaves an ESP-in-UDP packet made from shared pipe pages looking
like an ordinary uncloned nonlinear skb. ESP input then takes the no-COW
fast path for uncloned skbs without a frag_list and decrypts in place
over data that is not owned privately by the skb.

Mark IPv4/IPv6 datagram splice frags with SKBFL_SHARED_FRAG, matching
TCP. Also make ESP input fall back to skb_cow_data() when the flag is
present, so ESP does not decrypt externally backed frags in place.
Private nonlinear skb frags still use the existing fast path.

This intentionally does not change ESP output. In esp_output_head(),
the path that appends the ESP trailer to existing skb tailroom without
calling skb_cow_data() is not reachable for nonlinear skbs:
skb_tailroom() returns zero when skb->data_len is nonzero, while ESP
tailen is positive. Thus ESP output will either use the separate
destination-frag path or fall back to skb_cow_data().

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0001
Percentile
0,0th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

123

Write-what-where Condition

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Confidentiality Availability Access Control Other
Potential Impacts:
Modify Memory Execute Unauthorized Code Or Commands Gain Privileges Or Assume Identity Dos: Crash, Exit, Or Restart Bypass Protection Mechanism Other
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 4.11 (inclusive)
To 5.10.255 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 6.2 (inclusive)
To 6.6.138 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 5.16 (inclusive)
To 6.1.171 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 5.12 (inclusive)
To 5.15.205 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 6.7 (inclusive)
To 6.12.87 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 7.0 (inclusive)
To 7.0.5 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 6.13 (inclusive)
To 6.18.28 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/V4bel/dirtyfrag
https://github.com/V4bel/dirtyfrag
https://git.kernel.org/stable/c/50ed1e7873100f77abad20fd31c…
https://git.kernel.org/stable/c/50ed1e7873100f77abad20fd31c51029bc49cd03
https://git.kernel.org/stable/c/52646cbd00e765a6db9c3afe953…
https://git.kernel.org/stable/c/52646cbd00e765a6db9c3afe9535f26218276034
https://git.kernel.org/stable/c/5d55c7336f8032d434adcc5fab9…
https://git.kernel.org/stable/c/5d55c7336f8032d434adcc5fab987ccc93a44aec
https://git.kernel.org/stable/c/71a1d9d985d26716f74d21f18ee…
https://git.kernel.org/stable/c/71a1d9d985d26716f74d21f18ee8cac821b06e97
https://git.kernel.org/stable/c/8253aab4659ca16116b522203c2…
https://git.kernel.org/stable/c/8253aab4659ca16116b522203c2a6b18dccacea7
https://git.kernel.org/stable/c/a6cb440f274a22456ef3e86b457…
https://git.kernel.org/stable/c/a6cb440f274a22456ef3e86b457344f1678f38f9
https://git.kernel.org/stable/c/ab8b995323e5237041472d07e50…
https://git.kernel.org/stable/c/ab8b995323e5237041472d07e5055f5f7dcdf15b
https://git.kernel.org/stable/c/b54edf1e9a3fd3491bdcb82a21f…
https://git.kernel.org/stable/c/b54edf1e9a3fd3491bdcb82a21f8d21315271e0d
https://git.kernel.org/stable/c/fe785bb3a8096dffcc4048a85cd…
https://git.kernel.org/stable/c/fe785bb3a8096dffcc4048a85cd0c83337eeecad
http://www.openwall.com/lists/oss-security/2026/05/08/7
http://www.openwall.com/lists/oss-security/2026/05/08/7