CVE-2025-21926
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net: gso: fix ownership in __udp_gso_segment
In 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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | 9f28205ddb76e86cac418332e952241d85fed0dc | Unavailable | None listed |
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | a2d1cca955ed34873e524cc2e6e885450d262f05 | Unavailable | None listed |
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | 455217ac9db0cf9349b3933664355e907bb1a569 | Unavailable | None listed |
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | e8db70537878e1bb3fd83e5abcc6feefc0587828 | Unavailable | None listed |
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | 01a83237644d6822bc7df2c5564fc81b0df84358 | Unavailable | None listed |
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | 084819b0d8b1bd433b90142371eb9450d657f8ca | Unavailable | None listed |
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b | Unavailable | None listed |
| ad405857b174ed31a97982bb129c320d03321cf5 | affected | git | ee01b2f2d7d0010787c2343463965bbc283a497f | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.18 | Unavailable | None listed |
| 5.4.291 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.235 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.179 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.131 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.83 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.19 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.7 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |