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
7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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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