01 Record

CVE-2026-23273

macvlan: observe an RCU grace period in macvlan_common_newlink() error path

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

macvlan: observe an RCU grace period in macvlan_common_newlink() error path

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 2.7% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-03-20 08:08Z7 MO AGO

Last updated

2026-10-19 18:35Z9 DAYS AGO

Reserved

2026-01-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
CWE-416Use After FreeVariant

Data version

5.2

Document digest

7a849fe3118a086ccf0eff7b1aa63d6af220ddad4829275a62f622ce956b1c0a

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxda5c6b8ae47e414be47e5e04def15b25d5c962dc to < 91e4ff8d966978901630fc29582c1a76d3c6e46c, 5dae6b36a7cb7a4fcf4121b95e9ca7f96f816c8a to < 3d94323c80d7fc4da5f10f9bb06a45d39d5d3cc4, c43d0e787cbba569ec9d11579ed370b50fab6c9c to < 721eb342d9ba19bad5c4815ea3921465158b7362, 11ba9f0dc865136174cb98834280fb21bbc950c7 to < 19c7d8ac51988d053709c1e85bd8482076af845d, 986967a162142710076782d5b93daab93a892980 to < a1f686d273d129b45712d95f4095843b864466bd, cdedcd5aa3f3cb8b7ae0f87ab3a936d0bd583d66 to < d34f7a8aa9a25b7e64e0e46e444697c0f702374d, f8db6475a83649689c087a8f52486fcc53e627e9 to < 1e58ae87ad1e6e24368dea9aec9048c758cd0e2b, f8db6475a83649689c087a8f52486fcc53e627e9 to < e3f000f0dee1bfab52e2e61ca6a3835d9e187e35, 5.10.250 to < 5.10.252, 5.15.200 to < 5.15.202, 6.1.163 to < 6.1.165, 6.6.124 to < 6.6.128, 6.12.70 to < 6.12.75, 6.18.10 to < 6.18.14, 6.19—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/91e4ff8d966978901630fc29582c1a76d3c6e46c
git.kernel.orghttps://git.kernel.org/stable/c/3d94323c80d7fc4da5f10f9bb06a45d39d5d3cc4
git.kernel.orghttps://git.kernel.org/stable/c/721eb342d9ba19bad5c4815ea3921465158b7362
git.kernel.orghttps://git.kernel.org/stable/c/19c7d8ac51988d053709c1e85bd8482076af845d
git.kernel.orghttps://git.kernel.org/stable/c/a1f686d273d129b45712d95f4095843b864466bd
git.kernel.orghttps://git.kernel.org/stable/c/d34f7a8aa9a25b7e64e0e46e444697c0f702374d
git.kernel.orghttps://git.kernel.org/stable/c/1e58ae87ad1e6e24368dea9aec9048c758cd0e2b
git.kernel.orghttps://git.kernel.org/stable/c/e3f000f0dee1bfab52e2e61ca6a3835d9e187e35
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-784472.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.170-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.85-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.18.14-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.