CVE-2026-23273 — Signal Handler Race Condition in Linux
Severity
7.8HIGHNVD
EPSS
0.0%
top 97.70%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 20
Description
In the Linux kernel, the following vulnerability has been resolved:
macvlan: observe an RCU grace period in macvlan_common_newlink() error path
valis reported that a race condition still happens after my prior patch.
macvlan_common_newlink() might have made @dev visible before
detecting an error, and its caller will directly call free_netdev(dev).
We must respect an RCU period, either in macvlan or the core networking
stack.
After adding a temporary mdelay(1000) in macvlan_forward_source_on…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages3 packages
▶CVEListV5linux/linuxda5c6b8ae47e414be47e5e04def15b25d5c962dc — 91e4ff8d966978901630fc29582c1a76d3c6e46c+8
🔴Vulnerability Details
4GHSA▶
GHSA-r5gh-q6f7-7q3v: In the Linux kernel, the following vulnerability has been resolved:
macvlan: observe an RCU grace period in macvlan_common_newlink() error path
vali↗2026-03-20
OSV▶
CVE-2026-23273: In the Linux kernel, the following vulnerability has been resolved: macvlan: observe an RCU grace period in macvlan_common_newlink() error path valis↗2026-03-20