CVE-2026-43500

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43500
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries externally-owned paged fragments (e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via __ip_append_data, or a chained skb_has_frag_list()) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate to also unshare when skb_has_frag_list() or skb_has_shared_frag() is true. This catches the splice-loopback vector and other externally-shared frag sources while preserving the zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC page_pool RX, GRO). The OOM/trace handling already in place is reused.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea927f568
https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c Patch
https://git.kernel.org/stable/c/7c504ffab3efce8f7e4f463b314ae31030bdf18b
https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 Patch
https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411 Patch
https://github.com/V4bel/dirtyfrag
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.3:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.3:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.3:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
History

17 May 2026, 16:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/7c504ffab3efce8f7e4f463b314ae31030bdf18b -

14 May 2026, 15:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea927f568 -

11 May 2026, 17:16

Type Values Removed Values Added
References
  • () https://github.com/V4bel/dirtyfrag -

11 May 2026, 12:17

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:5.3:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.3:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.3:rc7:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c - () https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c - Patch
References () https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 - () https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 - Patch
References () https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411 - () https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
First Time Linux linux Kernel
Linux
CWE CWE-787

11 May 2026, 08:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-11 08:16

Updated : 2026-05-17 16:16

NVD link : CVE-2026-43500

Mitre link : CVE-2026-43500

CVE.ORG link : CVE-2026-43500

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-787

Out-of-bounds Write