CVE ID :CVE-2026-64528<\/p>\n
Published : July 25, 2026, 10:17 a.m. | 1\u00a0hour, 34\u00a0minutes ago<\/p>\n
Description :In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
tty: serial: samsung: Remove redundant port lock acquisition in rx helpers<\/p>\n
Sashiko identified a deadlock when the console flow is engaged [1].<\/p>\n
When console flow control is enabled (UPF_CONS_FLOW),
\ns3c24xx_serial_stop_tx() calls s3c24xx_serial_rx_enable() and
\ns3c24xx_serial_start_tx() calls s3c24xx_serial_rx_disable().<\/p>\n
The serial core framework invokes the .stop_tx() and .start_tx()
\ncallbacks with the port->lock spinlock already held. Furthermore, all
\ninternal driver paths that invoke stop_tx (such as the DMA TX
\ncompletion handler s3c24xx_serial_tx_dma_complete() or the PIO TX IRQ
\nhandler s3c24xx_serial_tx_irq()) also acquire port->lock prior to
\ncalling it. (Note that s3c24xx_serial_start_tx() is only invoked by the
\nserial core).<\/p>\n
However, s3c24xx_serial_rx_enable() and s3c24xx_serial_rx_disable()
\nunconditionally attempt to acquire port->lock again using
\nuart_port_lock_irqsave(). Since spinlocks are not recursive, this
\ncauses a deadlock on the same CPU when console flow control is engaged.<\/p>\n
Remove the redundant lock acquisition from both rx helper functions.<\/p>\n
Severity: 0.0 | NA<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID :CVE-2026-64528 Published : July 25, 2026, 10:17 a.m. | 1\u00a0hour, 34\u00a0minutes ago Description :In the Linux kernel, the following vulnerability has been resolved: tty: serial: samsung: Remove redundant port lock acquisition in rx helpers Sashiko identified a deadlock when the console flow is engaged [1]. When console flow control is enabled (UPF_CONS_FLOW), s3c24xx_serial_stop_tx() …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82549","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82549"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82549\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}