CVE-2025-38083net_sched: prio: fix a race in prio_tune()
Updated under an hour ago ()
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It affects Linux and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net_sched: prio: fix a race in prio_tune() Gerrard Tai reported a race condition in PRIO, 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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 before 53d11560e957d53ee87a0653d258038ce12361b7; from 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 before 4483d8b9127591c60c4eb789d6cab953bc4522a9; from 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 before 20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8f; 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 builds before 3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4; from 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 before 46c15c9d0f65c9ba857d63f53264f4b17e8a715f; from 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 before e3f6745006dc9423d2b065b90f191cfa11b1b584; from 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 before 93f9eeb678d4c9c1abf720b3615fa8299a490845; from 7b8e0b6e659983154c8d7e756cdb833d89a3d4d7 before d35acc1be3480505b5931f17e4ea9b7617fea4d3 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.0 before 5.4.295; from 5.5 before 5.10.239; from 5.11 before 5.15.186; from 5.16 before 6.1.142; from 6.2 before 6.6.94; from 6.7 before 6.12.34; from 6.13 before 6.15.3; 6.16 | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/53d11560e957d53ee87a0653d258038ce12361b7patch
- https://git.kernel.org/stable/c/4483d8b9127591c60c4eb789d6cab953bc4522a9patch
- https://git.kernel.org/stable/c/20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8fpatch
- https://git.kernel.org/stable/c/3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4patch
- https://git.kernel.org/stable/c/46c15c9d0f65c9ba857d63f53264f4b17e8a715fpatch
- https://git.kernel.org/stable/c/e3f6745006dc9423d2b065b90f191cfa11b1b584patch
- https://git.kernel.org/stable/c/93f9eeb678d4c9c1abf720b3615fa8299a490845patch
- https://git.kernel.org/stable/c/d35acc1be3480505b5931f17e4ea9b7617fea4d3patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlthird-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlthird-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.