CVE-2025-37914net_sched: ets: Fix double list add in class with netem as child qdisc
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net_sched: ets: 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 ets, 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 doing the addition to cater for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 before 24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea; from dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 before 554acc5a2ea9703e08023eb9a003f9e5a830a502; from dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 before 9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990; from dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 before 72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3; from dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 before 1f01e9f961605eb397c6ecd1d7b0233dfbf9077c; from dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 before bc321f714de693aae06e3786f88df2975376d996; from dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 before 1a6d0c00fa07972384b0c308c72db091d49988b6 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.6 before 5.10.238; from 5.11 before 5.15.182; from 5.16 before 6.1.138; from 6.2 before 6.6.90; from 6.7 before 6.12.28; from 6.13 before 6.14.6; 6.15; 6.15; and 2 more ranges | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/24388ba0a1b1b6d4af1b205927ac7f7b119ee4eapatch
- https://git.kernel.org/stable/c/554acc5a2ea9703e08023eb9a003f9e5a830a502patch
- https://git.kernel.org/stable/c/9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990patch
- https://git.kernel.org/stable/c/72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3patch
- https://git.kernel.org/stable/c/1f01e9f961605eb397c6ecd1d7b0233dfbf9077cpatch
- https://git.kernel.org/stable/c/bc321f714de693aae06e3786f88df2975376d996patch
- https://git.kernel.org/stable/c/1a6d0c00fa07972384b0c308c72db091d49988b6patch
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.htmlmailing-list
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlmailing-list
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.