What’s Vulnerable › Vulnerabilities

CVE-2026-80737: serial: amba-pl011: synchronize DMA teardown

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-03 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: serial: amba-pl011: synchronize DMA teardown dmaengine_terminate_all() does not wait for a running callback, so the TX callback can still touch the TX buffer after it is freed. The RX poll timer reads the RX buffers without the port lock. Switch to dmaengine_terminate_sync() and delete the RX timer before freeing the buffers.

Affected products

• Linux kernel: 2.6.39 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/440915499231e9db1c361aa45bb702e8fd3b4a32
• https://git.kernel.org/stable/c/44bd0ecc3444882d08ecfbc2b2418d2f463d3186
• https://git.kernel.org/stable/c/5974cb66681eac367107b05924744d7e3b49d41c
• https://git.kernel.org/stable/c/9f6989e477f03a4721d34bb4b09b17accd40283e
• https://git.kernel.org/stable/c/a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e
• https://git.kernel.org/stable/c/c8c8e895f65fbf71ea6224e27cf8dab91b776e0d
• https://git.kernel.org/stable/c/f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03
• https://git.kernel.org/stable/c/fdfb46c387241b4eddd36d746793764413285913

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