01 Record

CVE-2020-36789

can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context

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

View raw JSON

02 Description

can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context

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

0.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 8.1% 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

2025-04-17 18:01Z1 YR AGO

Last updated

2026-05-11 13:42Z3 MO AGO

Reserved

2024-02-26

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

6bbac7ac2fa35498497589d503fd9e88dc697aa7bfd1d9e6c1b00afe3da53229

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 248b71ce92d4f3a574b2537f9838f48e892618f4, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 451187b20431924d13fcfecc500d7cd2d9951bac, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 3a922a85701939624484e7f2fd07d32beed00d25, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 7e4cf2ec0ca236c3e5f904239cec6efe1f3baf22, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < ab46748bf98864f9c3f5559060bf8caf9df2b41e, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 87530b557affe01c764de32dbeb58cdf47234574, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 2283f79b22684d2812e5c76fc2280aae00390365, 2.6.31—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/248b71ce92d4f3a574b2537f9838f48e892618f4
git.kernel.orghttps://git.kernel.org/stable/c/451187b20431924d13fcfecc500d7cd2d9951bac
git.kernel.orghttps://git.kernel.org/stable/c/3a922a85701939624484e7f2fd07d32beed00d25
git.kernel.orghttps://git.kernel.org/stable/c/7e4cf2ec0ca236c3e5f904239cec6efe1f3baf22
git.kernel.orghttps://git.kernel.org/stable/c/ab46748bf98864f9c3f5559060bf8caf9df2b41e
git.kernel.orghttps://git.kernel.org/stable/c/87530b557affe01c764de32dbeb58cdf47234574
git.kernel.orghttps://git.kernel.org/stable/c/2283f79b22684d2812e5c76fc2280aae00390365

01 Record index

CVE-2020-36789

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2020-36789

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References