01 Record

CVE-2026-31504

net: fix fanout UAF in packet_release() via NETDEV_UP race

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

net: fix fanout UAF in packet_release() via NETDEV_UP race

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

0.10% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 1.0% 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

2026-04-22 13:54Z6 MO AGO

Last updated

2026-10-19 18:45Z10 DAYS AGO

Reserved

2026-03-09

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

d455b3985e03d17a025dbcf82c2d2c00110999d18ea3cae1e6c7ab365062ce60

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxce06b03e60fc19c680d1bf873e779bf11c2fc518 to < ee642b1962caa9aa231c01abbd58bc453ae6b66e, ce06b03e60fc19c680d1bf873e779bf11c2fc518 to < 42cfd7898eeed290c9fb73f732af1f7d6b0a703e, ce06b03e60fc19c680d1bf873e779bf11c2fc518 to < 1b4c03f8892d955385c202009af7485364731bb9, ce06b03e60fc19c680d1bf873e779bf11c2fc518 to < 654386baef228c2992dbf604c819e4c7c35fc71b, ce06b03e60fc19c680d1bf873e779bf11c2fc518 to < 75fe6db23705a1d55160081f7b37db9665b1880b, ce06b03e60fc19c680d1bf873e779bf11c2fc518 to < d0c7cdc15fdf8c4f91aca1928e52295d175b6ec6, ce06b03e60fc19c680d1bf873e779bf11c2fc518 to < ceccbfc6de720ad633519a226715989cfb065af1, ce06b03e60fc19c680d1bf873e779bf11c2fc518 to < 42156f93d123436f2a27c468f18c966b7e5db796, 3.1—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/ee642b1962caa9aa231c01abbd58bc453ae6b66e
git.kernel.orghttps://git.kernel.org/stable/c/42cfd7898eeed290c9fb73f732af1f7d6b0a703e
git.kernel.orghttps://git.kernel.org/stable/c/1b4c03f8892d955385c202009af7485364731bb9
git.kernel.orghttps://git.kernel.org/stable/c/654386baef228c2992dbf604c819e4c7c35fc71b
git.kernel.orghttps://git.kernel.org/stable/c/75fe6db23705a1d55160081f7b37db9665b1880b
git.kernel.orghttps://git.kernel.org/stable/c/d0c7cdc15fdf8c4f91aca1928e52295d175b6ec6
git.kernel.orghttps://git.kernel.org/stable/c/ceccbfc6de720ad633519a226715989cfb065af1
git.kernel.orghttps://git.kernel.org/stable/c/42156f93d123436f2a27c468f18c966b7e5db796
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

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 6.19.11-1

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