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: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.14% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 3.4% 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 2026-07-14.
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 13:54Z4 MO AGO

Last updated

2026-08-05 12:23Z1 MO 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-416Use After FreeVariant
CWE-364Signal Handler Race ConditionBase

Data version

5.2

Document digest

5131605330d4bfff7fb488525e742972a3f2a4273214c0e2a481351a18967d32

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

01 Record index

CVE-2026-31504

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-31504

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References