CVE-2026-80982
CVE CVE-2026-80982EUVD EUVD-2026-76305Published 2026-09-11T19:42:42.000ZLast changed 2026-09-14T11:59:25.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix use-after-free in smc_rx_pipe_buf_release() smc_rx_splice() hands RMB pages to a pipe and takes a socket reference per entry so the smc_sock stays alive until the reader finishes. The connection does not: a concurrent close runs smc_conn_free(), which releases the receive buffer back to the link group pool. smc_rx_pipe_buf_release() tests sk_state before taking the socket lock. The state can change between the test and the lock, and smc_rx_update_cons() then dereferences conn->rmb_desc and walks conn->lgr, which smc_conn_free() has already released. On the is_reg_err path smcr_buf_unuse() frees the descriptor outright, so this is a use-after-free. Take the socket lock first and test conn->freed instead. smc_conn_free() sets that flag before releasing anything, and every caller holds the socket lock. The two paths exclude each other: either the pipe release runs first with everything valid, or it sees the flag and skips the update.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <0761e49aa78c2f1362511054c6e9670653858837; patch: 6.12.109; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <df441f3efbb50eb0f120b8de4bf441c31fb0551d; patch: 7.2.4; patch: 6.6.157; patch: 6.18.50; patch: 6.1.188; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <6a644a7340df978785f3109d1e0726a982ce2c6f; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <c924884743e948e25625b7fbf3ee2a9325a204a7; patch: 7.3-rc1; patch: 0; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <0926f59ca0f94120895b92180c636a48d0ed3a6d; 4.18; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <dadd97c8296b23aa816e91ed70041820ae087baa
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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