Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4.213, < 5.5 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0383b25488a545be168744336847549d4a2d3d6cPatch
- https://git.kernel.org/stable/c/073f64c03516bcfaf790f8edc772e0cfb8a84ec3Patch
- https://git.kernel.org/stable/c/0b479d0aa488cb478eb2e1d8868be946ac8afb4fPatch
- https://git.kernel.org/stable/c/347867cb424edae5fec1622712c8dd0a2c42918fPatch
- https://git.kernel.org/stable/c/d92adacdd8c2960be856e0b82acc5b7c5395fddbPatch
- https://git.kernel.org/stable/c/eb7b74e9754e1ba2088f914ad1f57a778b11894bPatch
- https://git.kernel.org/stable/c/fed94bd51d62d2e0e006aa61480e94e5cd0582b0Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2025-38107?
CVE-2025-38107 is a vulnerability with a CVSS score of 7.0 (HIGH). 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...
How severe is CVE-2025-38107?
CVE-2025-38107 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38107?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.