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CVE-2025-37913

7.8 high SSVC exploitation: none Modified
NVD · CVE.org

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/

Fix

Patch, vendor advisory and mitigation references on NVD 8

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.8 · linux, debianNVD modified 2026-10-15 22:18

Affected (CPE criteria) 13

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.0:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.0:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.0:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.0:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.0:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.0:rc8:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References 10