Към съдържанието

CVE-2026-80982: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

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.

Засегнати продукти

  • Linux Linux: 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f преди dadd97c8296b23aa816e91ed70041820ae087baa; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f преди df441f3efbb50eb0f120b8de4bf441c31fb0551d; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f преди 6a644a7340df978785f3109d1e0726a982ce2c6f; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f преди 0761e49aa78c2f1362511054c6e9670653858837; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f преди 0926f59ca0f94120895b92180c636a48d0ed3a6d; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f преди c924884743e948e25625b7fbf3ee2a9325a204a7
  • Linux Linux: 4.18; преди 4.18; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

История

  • 11 септември 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-80982: Linux | freedomonline.bg