CVE-2024-27390

ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()

published May 1, 2024

CVSS
—
EPSS
0%
Percentile
12.3
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()

As discussed in the past (commit 2d3916f31891 ("ipv6: fix skb drops

in igmp6_event_query() and igmp6_event_report()")) I think the

synchronize_net() call in ipv6_mc_down() is not needed.

Under load, synchronize_net() can last between 200 usec and 5 ms.

KASAN seems to agree as well.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00223 · 12.3th percentile
Published
2024-05-01T13:05Z
EPSS history
Timeline
  • 01 MAY 13:05Z
    ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()
    cvelistv5