01 Record

CVE-2021-46904

net: hso: fix null-ptr-deref during tty device unregistration

UnratedPUBLISHEDCNA: Linux

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

net: hso: fix null-ptr-deref during tty device unregistration

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

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 17.2% 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

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

2024-02-25 14:03Z2 YR AGO

Last updated

2026-05-11 13:44Z3 MO AGO

Reserved

2024-02-25

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

6f09990541449c87ef5a115795a5e1bf322814afa470df83e868232f9320454c

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < a462067d7c8e6953a733bf5ade8db947b1bb5449, 72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < 145c89c441d27696961752bf51b323f347601bee, 72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < caf5ac93b3b5d5fac032fc11fbea680e115421b4, 72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < 92028d7a31e55d53e41cff679156b9432cffcb36, 72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < 4a2933c88399c0ebc738db39bbce3ae89786d723, 72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac, 72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < 388d05f70f1ee0cac4a2068fd295072f1a44152a, 72dc1c096c7051a48ab1dbb12f71976656b55eb5 to < 8a12f8836145ffe37e9c8733dce18c22fb668b66, 2.6.27—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449
git.kernel.orghttps://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee
git.kernel.orghttps://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4
git.kernel.orghttps://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36
git.kernel.orghttps://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723
git.kernel.orghttps://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac
git.kernel.orghttps://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a
git.kernel.orghttps://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66

01 Record index

CVE-2021-46904

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-46904

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References