PT-2026-51973 · Linux · Linux

Publicado 2026-06-24 · Atualizado 2026-06-24 · CVE-2026-53079

NVD

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

net sched: fix skb memory leak in deferred qdisc drops

When the network stack cleans up the deferred list via qdisc run end(), it operates on the root qdisc. If the root qdisc do not implement the TCQ F DEQUEUE DROPS flag the packets queue to free are never freed and gets stranded on the child's local to free list.

Fix this by making qdisc dequeue drop() aware of the root qdisc. It fetches the root qdisc and check for the TCQ F DEQUEUE DROPS flag. If the flag is present, the packet is appended directly to the root's to free list. Otherwise, drop it directly as it was done before the optimization was implemented.

Identificadores relacionados

CVE-2026-53079

Produtos afetados

Linux

Referências · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-53079 · Nota de Segurança
• https://git.kernel.org/stable/c/bf26ad92ffda7884825d67b46bd5efe615c3babf · Nota
• https://git.kernel.org/stable/c/a6bd339dbb3514bce690fdcf252e788dfab4ee76 · Nota