CVE-2025-38107
What it is
In the Linux kernel, the following vulnerability has been resolved: net_sched: ets: fix a race in ets_qdisc_change() Gerrard Tai reported a race condition in ETS, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-362 · Race condition
- Record status
- Modified
Affected
- Linux Kernel < 5.5
- Linux Kernel < 5.10.239
- Linux Kernel < 5.15.186
- Linux Kernel < 6.0
- Linux Kernel < 6.1.142
- Linux Kernel < 6.6.94
- Linux Kernel < 6.12.34
- Linux Kernel < 6.15.3
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2025-38107.md and follow it. Check whether this project is affected by CVE-2025-38107. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/0383b25488a545be168744336847549d4a2d3d6c
- https://git.kernel.org/stable/c/073f64c03516bcfaf790f8edc772e0cfb8a84ec3
- https://git.kernel.org/stable/c/0b479d0aa488cb478eb2e1d8868be946ac8afb4f
- https://git.kernel.org/stable/c/347867cb424edae5fec1622712c8dd0a2c42918f
- https://git.kernel.org/stable/c/d92adacdd8c2960be856e0b82acc5b7c5395fddb
- https://git.kernel.org/stable/c/eb7b74e9754e1ba2088f914ad1f57a778b11894b
- https://git.kernel.org/stable/c/fed94bd51d62d2e0e006aa61480e94e5cd0582b0
References
- https://git.kernel.org/stable/c/0383b25488a545be168744336847549d4a2d3d6c
- https://git.kernel.org/stable/c/073f64c03516bcfaf790f8edc772e0cfb8a84ec3
- https://git.kernel.org/stable/c/0b479d0aa488cb478eb2e1d8868be946ac8afb4f
- https://git.kernel.org/stable/c/347867cb424edae5fec1622712c8dd0a2c42918f
- https://git.kernel.org/stable/c/d92adacdd8c2960be856e0b82acc5b7c5395fddb
- https://git.kernel.org/stable/c/eb7b74e9754e1ba2088f914ad1f57a778b11894b
- https://git.kernel.org/stable/c/fed94bd51d62d2e0e006aa61480e94e5cd0582b0
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html