net: gso: fix ownership in __udp_gso_segment

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-21926
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-04-01 16:15:23 UTC
Updated2026-07-14 13:17:27 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: gso: fix ownership in __udp_gso_segment In __udp_gso_segment the skb destructor is removed before segmenting the skb but the socket reference is kept as-is. This is an issue if the original skb is later orphaned as we can hit the following bug: kernel BUG at ./include/linux/skbuff.h:3312! (skb_orphan) RIP: 0010:ip_rcv_core+0x8b2/0xca0 Call Trace: ip_rcv+0xab/0x6e0 __netif_receive_skb_one_core+0x168/0x1b0 process_backlog+0x384/0x1100 __napi_poll.constprop.0+0xa1/0x370 net_rx_action+0x925/0xe50 The above can happen following a sequence of events when using OpenVSwitch, when an OVS_ACTION_ATTR_USERSPACE action precedes an OVS_ACTION_ATTR_OUTPUT action: 1. OVS_ACTION_ATTR_USERSPACE is handled (in do_execute_actions): the skb goes through queue_gso_packets and then __udp_gso_segment, where its destructor is removed. 2. The segments' data are copied and sent to userspace. 3. OVS_ACTION_ATTR_OUTPUT is handled (in do_execute_actions) and the same original skb is sent to its path. 4. If it later hits skb_orphan, we hit the bug. Fix this by also removing the reference to the socket in __udp_gso_segment.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 9f28205ddb76e86cac418332e952241d85fed0dc git Not specified
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 a2d1cca955ed34873e524cc2e6e885450d262f05 git Not specified
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 455217ac9db0cf9349b3933664355e907bb1a569 git Not specified
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 e8db70537878e1bb3fd83e5abcc6feefc0587828 git Not specified
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 01a83237644d6822bc7df2c5564fc81b0df84358 git Not specified
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 084819b0d8b1bd433b90142371eb9450d657f8ca git Not specified
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b git Not specified
CNA Linux Linux affected ad405857b174ed31a97982bb129c320d03321cf5 ee01b2f2d7d0010787c2343463965bbc283a497f git Not specified
CNA Linux Linux affected 4.18 Not specified
CNA Linux Linux unaffected 4.18 semver Not specified
CNA Linux Linux unaffected 5.4.291 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.235 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.179 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.131 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.83 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.19 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13.7 6.13.* semver Not specified
CNA Linux Linux unaffected 6.14 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/05/msg00030.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/455217ac9db0cf9349b3933664355e907bb1a569 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ee01b2f2d7d0010787c2343463965bbc283a497f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-019113.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
lists.debian.org/debian-lts-announce/2025/05/msg00045.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/01a83237644d6822bc7df2c5564fc81b0df84358 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/084819b0d8b1bd433b90142371eb9450d657f8ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9f28205ddb76e86cac418332e952241d85fed0dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e8db70537878e1bb3fd83e5abcc6feefc0587828 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a2d1cca955ed34873e524cc2e6e885450d262f05 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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