Vulnerability-Lookup

FKIE_CVE-2026-43500

Vulnerability from fkie_nvd - Published: 2026-05-11 08:16 - Updated: 2026-05-14 15:16

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea927f568
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411	Patch
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/V4bel/dirtyfrag

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.3
linux	linux_kernel	5.3
linux	linux_kernel	5.3
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Also unshare DATA/RESPONSE packets when paged frags are present\n\nThe DATA-packet handler in rxrpc_input_call_event() and the RESPONSE\nhandler in rxrpc_verify_response() copy the skb to a linear one before\ncalling into the security ops only when skb_cloned() is true.  An skb\nthat is not cloned but still carries externally-owned paged fragments\n(e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via\n__ip_append_data, or a chained skb_has_frag_list()) falls through to\nthe in-place decryption path, which binds the frag pages directly into\nthe AEAD/skcipher SGL via skb_to_sgvec().\n\nExtend the gate to also unshare when skb_has_frag_list() or\nskb_has_shared_frag() is true.  This catches the splice-loopback vector\nand other externally-shared frag sources while preserving the\nzero-copy fast path for skbs whose frags are kernel-private (e.g. NIC\npage_pool RX, GRO).  The OOM/trace handling already in place is reused."
    }
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      "type": "Secondary"
    }
  ]
}

CVE-2026-43500 (GCVE-0-2026-43500)

Vulnerability from cvelistv5 – Published: 2026-05-11 06:26 – Updated: 2026-05-14 14:30

Title

rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present

Summary

Severity ?

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-787 - Out-of-bounds Write

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/3711382a77342a9a1…
https://git.kernel.org/stable/c/3eae0f4f9f7206a48…
https://git.kernel.org/stable/c/d45179f8795222ce8…
https://git.kernel.org/stable/c/aa54b1d27fe0c2b78…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 , < 3711382a77342a9a1c3d2e7330dcfc7ea927f568 (git) Affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 , < 3eae0f4f9f7206a4801efa5e0235c25bbd5a412c (git) Affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 , < d45179f8795222ce858770dc619abe51f9d24411 (git) Affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 , < aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 (git)
Linux	Linux	Affected: 5.3 Unaffected: 0 , < 5.3 (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.29 , ≤ 6.18.* (semver) Unaffected: 7.0.6 , ≤ 7.0.* (semver) Unaffected: 7.1-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43500

CVE-2026-43500 (GCVE-0-2026-43500)

Tags

Sightings

Nomenclature