01 Record

CVE-2023-53343

icmp6: Fix null-ptr-deref of ip6_null_entry->rt6i_idev in icmp6_dev().

MediumPUBLISHEDCNA: Linux

CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

icmp6: Fix null-ptr-deref of ip6_null_entry->rt6i_idev in icmp6_dev().

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

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 10.7% 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

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

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

2025-09-17 14:56Z11 MO AGO

Last updated

2026-05-11 19:43Z3 MO AGO

Reserved

2025-09-16

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

b362382b133be58175c3616b7f4729bd7abafb4a681a8bc442b8c2159f906c86

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux4832c30d5458387ff2533ff66fbde26ad8bb5a2d to < 8803c59fde4dd370a627dfbf7183682fa0cabf70, 4832c30d5458387ff2533ff66fbde26ad8bb5a2d to < 61b4c4659746959056450b92a5d7e6bc1243b31b, 4832c30d5458387ff2533ff66fbde26ad8bb5a2d to < d30ddd7ff15df9d91a793ce3f06f0190ff7afacc, 4832c30d5458387ff2533ff66fbde26ad8bb5a2d to < 3fabca5d9cae0140b6aad09a1c6b9aa57089fbb8, 4832c30d5458387ff2533ff66fbde26ad8bb5a2d to < 1462e9d9aa52d14665eaca6d89d22c4af44ede04, 4832c30d5458387ff2533ff66fbde26ad8bb5a2d to < aa657d319e6c7502a4eb85cc0ee80cc81b8e5724, 4832c30d5458387ff2533ff66fbde26ad8bb5a2d to < 2aaa8a15de73874847d62eb595c6683bface80fd, 4.14—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/8803c59fde4dd370a627dfbf7183682fa0cabf70
git.kernel.orghttps://git.kernel.org/stable/c/61b4c4659746959056450b92a5d7e6bc1243b31b
git.kernel.orghttps://git.kernel.org/stable/c/d30ddd7ff15df9d91a793ce3f06f0190ff7afacc
git.kernel.orghttps://git.kernel.org/stable/c/3fabca5d9cae0140b6aad09a1c6b9aa57089fbb8
git.kernel.orghttps://git.kernel.org/stable/c/1462e9d9aa52d14665eaca6d89d22c4af44ede04
git.kernel.orghttps://git.kernel.org/stable/c/aa657d319e6c7502a4eb85cc0ee80cc81b8e5724
git.kernel.orghttps://git.kernel.org/stable/c/2aaa8a15de73874847d62eb595c6683bface80fd

01 Record index

CVE-2023-53343

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2023-53343

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References