01 Record

CVE-2021-47383

tty: Fix out-of-bound vmalloc access in imageblit

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

tty: Fix out-of-bound vmalloc access in imageblit

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

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 18.4% of scored records. A rank, not a probability.

NVD base score

7.1 (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:H/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-04.

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

2026-08-05 08:47Z1 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

9458daffc46c5349d27ac3271c2d094a0182f371699274eb437115f8b788ef42

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 7e71fcedfda6f7de18f850a6b36e78d78b04476f, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 70aed03b1d5a5df974f456cdc8eedb213c94bb8b, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 067c694d06040db6f0c65281bb358452ca6d85b9, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8a6a240f52e14356386030d8958ae8b1761d2325, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 883f7897a25e3ce14a7f274ca4c73f49ac84002a, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < d570c48dd37dbe8fc6875d4461d01a9554ae2560, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 699d926585daa6ec44be556cdc1ab89e5d54557b, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 3b0c406124719b625b1aba431659f5cdc24a982c, 2.6.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/7e71fcedfda6f7de18f850a6b36e78d78b04476f
git.kernel.orghttps://git.kernel.org/stable/c/70aed03b1d5a5df974f456cdc8eedb213c94bb8b
git.kernel.orghttps://git.kernel.org/stable/c/067c694d06040db6f0c65281bb358452ca6d85b9
git.kernel.orghttps://git.kernel.org/stable/c/8a6a240f52e14356386030d8958ae8b1761d2325
git.kernel.orghttps://git.kernel.org/stable/c/883f7897a25e3ce14a7f274ca4c73f49ac84002a
git.kernel.orghttps://git.kernel.org/stable/c/d570c48dd37dbe8fc6875d4461d01a9554ae2560
git.kernel.orghttps://git.kernel.org/stable/c/699d926585daa6ec44be556cdc1ab89e5d54557b
git.kernel.orghttps://git.kernel.org/stable/c/3b0c406124719b625b1aba431659f5cdc24a982c

01 Record index

CVE-2021-47383

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47383

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References