CVE - CVE-2025-37915

CVE-ID
CVE-2025-37915	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: drr: 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 drr, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. In addition to checking for qlen being zero, this patch checks whether the class was already added to the active_list (cl_is_active) before adding to the list to cover for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/26e75716b94d6ff9be5ea07d63675c4d189f30b4 URL:https://git.kernel.org/stable/c/26e75716b94d6ff9be5ea07d63675c4d189f30b4 MISC:https://git.kernel.org/stable/c/2968632880f1792007eedd12eeedf7f6e2b7e9f3 URL:https://git.kernel.org/stable/c/2968632880f1792007eedd12eeedf7f6e2b7e9f3 MISC:https://git.kernel.org/stable/c/4f0ecf50cdf76da95828578a92f130b653ac2fcf URL:https://git.kernel.org/stable/c/4f0ecf50cdf76da95828578a92f130b653ac2fcf MISC:https://git.kernel.org/stable/c/ab2248110738d4429668140ad22f530a9ee730e1 URL:https://git.kernel.org/stable/c/ab2248110738d4429668140ad22f530a9ee730e1 MISC:https://git.kernel.org/stable/c/db205b92dfe0501e5b92fb7cf00971d0e44ba3eb URL:https://git.kernel.org/stable/c/db205b92dfe0501e5b92fb7cf00971d0e44ba3eb MISC:https://git.kernel.org/stable/c/f99a3fbf023e20b626be4b0f042463d598050c9a URL:https://git.kernel.org/stable/c/f99a3fbf023e20b626be4b0f042463d598050c9a
Assigning CNA
kernel.org
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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