In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_gate: snapshot parameters with RCU on replace
The gate action can be replaced while the hrtimer callback or dump path is
walking the schedule list.
Convert the parameters to an RCU-protected snapshot and swap updates under
tcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits
the entry list, preserve the existing schedule so the effective state is
unchanged.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 7
https://git.kernel.org/stable/c/04d75529dc0f9be78786162ebab7424af4644df2
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/58b162e318d0243ad2d7d92456c0873f2494c351
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/62413a9c3cb183afb9bb6e94dd68caf4e4145f4c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/035d0d09d5ab3ed3e93d18cde2b562a6719eea23
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8b1251bbf0f10ac745ed74bad4d3b433caa1eeae
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/dfc314d7c767e350f78a46a8f8b134f80e8ad432
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fc98fd8d214693be91253d9a88cdf8e5e143d124
416baaa9-dc9f-4396-8d5f-8c081fb06d67