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CVE-2025-37798

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.297, 5.10.241, 5.15.190, 6.1.135, 6.6.88, and 3 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fq_codel_dequeue() and codel_qdisc_dequeue().

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in 7a742a9506849d1c1aa71e36c89855ceddc7d58e; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in cc71a757da78dd4aa1b4a9b19cb011833730ccf2; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in 829c49b6b2ff45b043739168fd1245e4e1a91a30; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in 2f9761a94bae33d26e6a81b31b36e7d776d93dc1; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in 4d55144b12e742404bb3f8fee6038bafbf45619d; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in e73c838c80dccb9e4f19becc11d9f3cb4a27d483; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31; From 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 · fixed in 342debc12183b51773b3345ba267e9263bdfaaef

  • Linux Linux

    3.5

  • KernelLinux

    From 3.5.0 · fixed in 5.4.297; From 5.5.0 · fixed in 5.10.241; From 5.11.0 · fixed in 5.15.190; From 5.16.0 · fixed in 6.1.135; From 6.2.0 · fixed in 6.6.88; From 6.7.0 · fixed in 6.12.24; From 6.13.0 · fixed in 6.13.12; From 6.14.0 · fixed in 6.14.3

References 9

git.kernel.org