CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: fix performance regression in swap operation
The patch “netfilter: ipset: fix race condition between swap/destroy
and kernel side add/del/test”, commit 28628fa9 fixes a race condition.
But the synchronize_rcu() added to the swap function unnecessarily slows
it down: it can safely be moved to destroy and use call_rcu() instead.
Eric Dumazet pointed out that simply calling the destroy functions as
rcu callback does not work: sets with timeout use garbage collectors
which need cancelling at destroy which can wait. Therefore the destroy
functions are split into two: cancelling garbage collectors safely at
executing the command received by netlink and moving the remaining
part only into the rcu callback.
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
git.kernel.org/stable/c/653bc5e6d9995d7d5f497c665b321875a626161c
git.kernel.org/stable/c/970709a67696b100a57b33af1a3d75fc34b747eb
git.kernel.org/stable/c/97f7cf1cd80eeed3b7c808b7c12463295c751001
git.kernel.org/stable/c/a24d5f2ac8ef702a58e55ec276aad29b4bd97e05
git.kernel.org/stable/c/b93a6756a01f4fd2f329a39216f9824c56a66397
git.kernel.org/stable/c/c2dc077d8f722a1c73a24e674f925602ee5ece49
git.kernel.org/stable/c/c7f2733e5011bfd136f1ca93497394d43aa76225
lists.debian.org/debian-lts-announce/2024/06/msg00017.html