CVE-2025-38107
net_sched: ets: fix a race in ets_qdisc_change()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
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 Scores
SSVC
- Decision:-
Timeline
- 2025-04-16 CVE Reserved
- 2025-07-03 CVE Published
- 2025-07-09 EPSS Updated
- 2025-07-28 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (12)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/699d82e9a6db29d509a71f1f2f4316231e6232e6 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/ce881ddbdc028fb1988b66e40e45ca0529c23b46 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/b05972f01e7d30419987a1f221b5593668fd6448 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/fffa19b5e58c34004a0d6f642d9c24b11d213994 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/fb155f6597cd7bc3aeed668c3bb15fc3b7cb257d | Vuln. Introduced |
| URL | Date | SRC |
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| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10.142 < 5.10.239 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.142 < 5.10.239" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15.66 < 5.15.186 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.66 < 5.15.186" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.1.142 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.1.142" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.6.94 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.6.94" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.12.34 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.12.34" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.15.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.15.3" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.0 < 6.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.16" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.4.213 Search vendor "Linux" for product "Linux Kernel" and version "5.4.213" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.19.8 Search vendor "Linux" for product "Linux Kernel" and version "5.19.8" | en |
Affected
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