PT-2026-51973 · Linux · Linux
Published
2026-06-24
·
Updated
2026-06-24
·
CVE-2026-53079
None
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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.
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Related Identifiers
Affected Products
Linux