CVE-2026-72017

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: macb: drop in-flight Tx SKBs on close

The MACB driver has since forever leaked the outgoing SKBs that have not yet been marked as completed. They live in queue->tx_skb which gets freed without remorse nor checking.

macb_free_consistent() gets called in a few codepaths, but only close will trigger the added expressions. In macb_open() and macb_alloc_consistent() failure cases, queues' tx_skb just got allocated and are empty.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux89e5785fc8a6b9eafd37f2318a9a76d479c796be < 6124bd785073659c99385094657b77382ebce11baffected
LinuxLinux89e5785fc8a6b9eafd37f2318a9a76d479c796be < 2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4affected
LinuxLinux89e5785fc8a6b9eafd37f2318a9a76d479c796be < 26b131b2d5b55a81ef6182769d28105a870c0eb2affected
LinuxLinux89e5785fc8a6b9eafd37f2318a9a76d479c796be < 109241d9880488aafd8e104832b4d4859ad57244affected
LinuxLinux89e5785fc8a6b9eafd37f2318a9a76d479c796be < 27f575836cfebbf872dec020428742b10650a955affected
LinuxLinux2.6.20affected
LinuxLinux0 < 2.6.20unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc3 <= *unaffected

Weaknesses

References