01 Record

CVE-2021-47375

blktrace: Fix uaf in blk_trace access after removing by sysfs

MediumPUBLISHEDCNA: Linux

CNA base score6.2 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

View raw JSON

02 Description

blktrace: Fix uaf in blk_trace access after removing by sysfs

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

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 16.9% of scored records. A rank, not a probability.

NVD base score

6.2 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. 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

2024-05-21 15:03Z2 YR AGO

Last updated

2026-05-11 13:53Z3 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 6.2)

CNA CVSS vector

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

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

567b47a19490899a177b94647b34a1df47da7b1a3ac620a57080197f9c90f456

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxc71a896154119f4ca9e89d6078f5f63ad60ef199 to < 488da313edf3abea7f7733efe011c96b23740ab5, c71a896154119f4ca9e89d6078f5f63ad60ef199 to < dacfd5e4d1142bfb3809aab3634a375f6f373269, c71a896154119f4ca9e89d6078f5f63ad60ef199 to < d56171d9360c0170c5c5f8f7e2362a2e999eca40, c71a896154119f4ca9e89d6078f5f63ad60ef199 to < 677e362ba807f3aafe6f405c07e0b37244da5222, c71a896154119f4ca9e89d6078f5f63ad60ef199 to < ebb8d26d93c3ec3c7576c52a8373a2309423c069, c71a896154119f4ca9e89d6078f5f63ad60ef199 to < 3815fe7371d2411ce164281cef40d9fc7b323dee, c71a896154119f4ca9e89d6078f5f63ad60ef199 to < a5f8e86192612d0183047448d8bbe7918b3f1a26, c71a896154119f4ca9e89d6078f5f63ad60ef199 to < 5afedf670caf30a2b5a52da96eb7eac7dee6a9c9, 2.6.30—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/488da313edf3abea7f7733efe011c96b23740ab5
git.kernel.orghttps://git.kernel.org/stable/c/dacfd5e4d1142bfb3809aab3634a375f6f373269
git.kernel.orghttps://git.kernel.org/stable/c/d56171d9360c0170c5c5f8f7e2362a2e999eca40
git.kernel.orghttps://git.kernel.org/stable/c/677e362ba807f3aafe6f405c07e0b37244da5222
git.kernel.orghttps://git.kernel.org/stable/c/ebb8d26d93c3ec3c7576c52a8373a2309423c069
git.kernel.orghttps://git.kernel.org/stable/c/3815fe7371d2411ce164281cef40d9fc7b323dee
git.kernel.orghttps://git.kernel.org/stable/c/a5f8e86192612d0183047448d8bbe7918b3f1a26
git.kernel.orghttps://git.kernel.org/stable/c/5afedf670caf30a2b5a52da96eb7eac7dee6a9c9

01 Record index

CVE-2021-47375

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47375

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References