DEBIAN-CVE-2025-37913
Record from OSV · Published May 20, 2025
In the Linux kernel, the following vulnerability has been resolved: net_sched: qfq: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of qfq, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. This patch checks whether the class was already added to the agg->active list (cl_is_active) before doing the addition to cater for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
Fixed versions
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| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:13 | 6.12.29-1 |
| linux | Debian:12 | 6.1.140-1 |
| linux | Debian:14 | 6.12.29-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | linux | 0 |
| Debian:12 | linux | 0, 6.1.106-1, 6.1.106-2 |
| Debian:14 | linux | 0 |
Timeline
- May 20, 2025 CVE Published
- Oct 16, 2026 CVE Updated
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