CVE-2026-74654

CVE CVE-2026-74654EUVD EUVD-2026-64591Published 2026-08-22T15:32:29.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dma: Clear stale RX state on shutdown serial8250_release_dma() terminates RX DMA and releases the channel, but leaves rx_running set. If the port is closed while an RX transfer is active, the stale state remains while rxchan is NULL until the channel is requested again on the next open. The DesignWare BUSY workaround added by commit a7b9ce39fbe4 ("serial: 8250_dw: Ensure BUSY is deasserted") calls serial8250_rx_dma_flush() from the LCR write path during startup. This happens before serial8250_request_dma() obtains a new RX channel. On reopen, the stale rx_running state therefore makes the flush path pass a NULL channel to dmaengine_pause(), causing a kernel Oops. Clear rx_running after terminating RX DMA, matching the TX cleanup. Also make the flush helper return if the DMA object or RX channel is not available so startup and teardown paths cannot pass a NULL channel to the DMAengine API.

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 patch: 0; patch: 6.18.45; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <d06cfb1add4a2d5b393e9e31f49ebbd168beea49; patch: 5.10.265; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <9f2444f4c0e4b06f61bae38da87c9c94c78efa86; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <e7e3cc6709caa49d1d6ce6c1f7cb305e38675cc9; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <e10f06ee050a08930e2339b6fec7148fd0b2a8f6; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <e7a5d792cf64a2096e18f1d573cc3d01cba15e92; 3.19; patch: 7.2; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <bf4fb620e02962b2b52500a4b3d8420f351eb46a; patch: 6.1.183; patch: 6.12.104; patch: 5.15.216; patch: 6.6.152; patch: 7.1.9; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <e2fe6a0efecbef00e3ecc2db64dd5afa8c212b41; 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe <ae05d9e50b6b9f246c110b3bdc03676145c2d0d4

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

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Linux — Linux

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