CVE-2025-38107 (GCVE-0-2025-38107)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:35 – Updated: 2026-05-23 15:59
VLAI
Title
net_sched: ets: fix a race in ets_qdisc_change()
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 699d82e9a6db29d509a71f1f2f4316231e6232e6 , < eb7b74e9754e1ba2088f914ad1f57a778b11894b (git)
Affected: ce881ddbdc028fb1988b66e40e45ca0529c23b46 , < 0b479d0aa488cb478eb2e1d8868be946ac8afb4f (git)
Affected: b05972f01e7d30419987a1f221b5593668fd6448 , < 347867cb424edae5fec1622712c8dd0a2c42918f (git)
Affected: b05972f01e7d30419987a1f221b5593668fd6448 , < 0383b25488a545be168744336847549d4a2d3d6c (git)
Affected: b05972f01e7d30419987a1f221b5593668fd6448 , < 073f64c03516bcfaf790f8edc772e0cfb8a84ec3 (git)
Affected: b05972f01e7d30419987a1f221b5593668fd6448 , < fed94bd51d62d2e0e006aa61480e94e5cd0582b0 (git)
Affected: b05972f01e7d30419987a1f221b5593668fd6448 , < d92adacdd8c2960be856e0b82acc5b7c5395fddb (git)
Affected: fffa19b5e58c34004a0d6f642d9c24b11d213994 (git)
Affected: fb155f6597cd7bc3aeed668c3bb15fc3b7cb257d (git)
Affected: 5.10.142 , < 5.10.239 (semver)
Affected: 5.15.66 , < 5.15.186 (semver)
Affected: 5.4.213 , < 5.5 (semver)
Affected: 5.19.8 , < 5.20 (semver)
Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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