CVE-2026-31638High· 7.5▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: rxrpc: Only put the call ref if one was acquired rxrpc_input_packet_on_conn() can process a to-client packet after the current client call on the channel has already b…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.6%
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Only put the call ref if one was acquired
rxrpc_input_packet_on_conn() can process a to-client packet after the current client call on the channel has already been torn down. In that case chan->call is NULL, rxrpc_try_get_call() returns NULL and there is no reference to drop.
The client-side implicit-end error path does not account for that and unconditionally calls rxrpc_put_call(). This turns a protocol error path into a kernel crash instead of rejecting the packet.
Only drop the call reference if one was actually acquired. Keep the existing protocol error handling unchanged.
Linux >= 5e6ef4f1017c7f844e305283bbd8875af475e2fc < b8f66447448d6c305a51413a67ec8ed26aa7d1ddLinux >= 5e6ef4f1017c7f844e305283bbd8875af475e2fc < 0c156aff8a2d4fa0d61db7837641975cf0e5452dLinux >= 5e6ef4f1017c7f844e305283bbd8875af475e2fc < 8299ca146489664e3c0c90a3b8900d8335b1ede4Linux >= 5e6ef4f1017c7f844e305283bbd8875af475e2fc < 9fb09861e2b8d1abfe2efaf260c9f1d30080ea38Linux >= 5e6ef4f1017c7f844e305283bbd8875af475e2fc < 6331f1b24a3e85465f6454e003a3e6c22005a5c5Linux 6.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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