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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-43500

⇱ NVD - CVE-2026-43500

  1. Vulnerabilities

CVE-2026-43500 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea927f568 kernel.org
https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c kernel.org Patch 
https://git.kernel.org/stable/c/7c504ffab3efce8f7e4f463b314ae31030bdf18b kernel.org
https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 kernel.org Patch 
https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411 kernel.org Patch 
https://github.com/V4bel/dirtyfrag CISA-ADP

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write 👁 cwe source acceptance level
NIST   CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 6:49:49 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-05-11T15:51:19.227001Z","id":"CVE-2026-43500","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by kernel.org 6/17/2026 6:49:49 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/rxrpc/call_event.c","net/rxrpc/conn_event.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"d0d5c0cd1e711c98703f3544c1e6fc1372898de5","lessThan":"7c504ffab3efce8f7e4f463b314ae31030bdf18b","versionType":"git","status":"affected"},{"version":"d0d5c0cd1e711c98703f3544c1e6fc1372898de5","lessThan":"3711382a77342a9a1c3d2e7330dcfc7ea927f568","versionType":"git","status":"affected"},{"version":"d0d5c0cd1e711c98703f3544c1e6fc1372898de5","lessThan":"3eae0f4f9f7206a4801efa5e0235c25bbd5a412c","versionType":"git","status":"affected"},{"version":"d0d5c0cd1e711c98703f3544c1e6fc1372898de5","lessThan":"d45179f8795222ce858770dc619abe51f9d24411","versionType":"git","status":"affected"},{"version":"d0d5c0cd1e711c98703f3544c1e6fc1372898de5","lessThan":"aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/rxrpc/call_event.c","net/rxrpc/conn_event.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.3","status":"affected"},{"version":"0","lessThan":"5.3","versionType":"semver","status":"unaffected"},{"version":"6.6.140","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.88","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.29","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.0.6","lessThanOrEqual":"7.0.*","versionType":"semver","status":"unaffected"},{"version":"7.1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

CVE Modified by kernel.org 6/14/2026 2:16:56 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE Modified by kernel.org 5/17/2026 12:16:16 PM

Action Type Old Value New Value
Added Reference 
https://git.kernel.org/stable/c/7c504ffab3efce8f7e4f463b314ae31030bdf18b

CVE Modified by kernel.org 5/14/2026 11:16:47 AM

Action Type Old Value New Value
Added Reference 
https://git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea927f568

CVE Modified by CISA-ADP 5/11/2026 1:16:34 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Added CWE 
CWE-787
Added Reference 
https://github.com/V4bel/dirtyfrag

Initial Analysis by NIST 5/11/2026 8:17:27 AM

Action Type Old Value New Value
Added CVSS V3.1 
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Added CWE 
CWE-787
Added CPE Configuration 
OR
 *cpe:2.3:o:linux:linux_kernel:5.3:-:*:*:*:*:*:*
 *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:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (excluding) 5.3 up to (excluding) 6.18.29
 *cpe:2.3:o:linux:linux_kernel:5.3:rc7:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.6
Added Reference Type 
kernel.org: https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c Types: Patch
Added Reference Type 
kernel.org: https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 Types: Patch
Added Reference Type 
kernel.org: https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411 Types: Patch

New CVE Received from kernel.org 5/11/2026 4:16:16 AM

Action Type Old Value New Value
Added Description 
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.
Added Reference 
https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c
Added Reference 
https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71
Added Reference 
https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411

Quick Info

CVE Dictionary Entry:
CVE-2026-43500
NVD Published Date:
05/11/2026
NVD Last Modified:
06/17/2026
Source:
kernel.org