01 Record

CVE-2021-47418

net_sched: fix NULL deref in fifo_set_limit()

UnratedPUBLISHEDCNA: Linux

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

net_sched: fix NULL deref in fifo_set_limit()

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 ImpactpartialSuccessful exploitation gives limited 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

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 14.4% of scored records. A rank, not a probability.

NVD base score

5.5 (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:N/I:N/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. 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

2024-05-21 15:04Z2 YR AGO

Last updated

2026-05-11 13:54Z3 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

ed19f4e72bf1963505bcf9a4d68264c4f60c41f466aa358ec2186a35db818cc0

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxfb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < 0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52, fb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < 08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4, fb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < 26af64d71b6277841285fa40e3f7164a378dfda9, fb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < d07098f45be868a9cdce6c616563c36c64dbbd87, fb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < c951a3be5e8803e93bb49a0aca0d30457d3c1b67, fb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < acff2d182c0768a713cee77442caeb07668bd68f, fb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < fb58cd7991747b5e0b110c98c922d7b0e47a1f14, fb0305ce1b03f6ff17f84f2c63daccecb45f2805 to < 560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc, 2.6.27—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52
git.kernel.orghttps://git.kernel.org/stable/c/08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4
git.kernel.orghttps://git.kernel.org/stable/c/26af64d71b6277841285fa40e3f7164a378dfda9
git.kernel.orghttps://git.kernel.org/stable/c/d07098f45be868a9cdce6c616563c36c64dbbd87
git.kernel.orghttps://git.kernel.org/stable/c/c951a3be5e8803e93bb49a0aca0d30457d3c1b67
git.kernel.orghttps://git.kernel.org/stable/c/acff2d182c0768a713cee77442caeb07668bd68f
git.kernel.orghttps://git.kernel.org/stable/c/fb58cd7991747b5e0b110c98c922d7b0e47a1f14
git.kernel.orghttps://git.kernel.org/stable/c/560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc

01 Record index

CVE-2021-47418

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47418

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References