CVE-2021-47642: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow
Vulnerability summary
CVE-2021-47642 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.2% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 26-02-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow Coverity complains of a possible buffer overflow. However, given the 'static' scope of nvidia_setup_i2c_bus() it looks like that can't happen after examiniing the call sites. CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 1. fixed_size_dest: You might overrun the 48-character fixed-size string chan->adapter.name by copying name without checking the length. 2. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 89 strcpy(chan->adapter.name, name); Fix this warning by using strscpy() which will silence the warning and prevent any future buffer overflows should the names used to identify the channel become much longer.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.29% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu106 products
- linuxAll versions (No fix recorded) | < 4.15.0-189.200 | < 5.4.0-117.132 | < 5.15.0-37.39
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1137.148 | < 5.4.0-1078.84 | < 5.15.0-1011.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 47e5533adf118afaf06d25a3e2aaaab89371b1c5 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 580e5d3815474b8349250c25c16416585a72c7fe | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 72dd5c46a152136712a55bf026a9aa8c1b12b60d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 055cdd2e7b992921424d4daaa285ced787fb205f | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 08dff482012758935c185532b1ad7d584785a86e | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9ff2f7294ab0f011cd4d1b7dcd9a07d8fdf72834 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6a5226e544ac043bb2d8dc1bfe8920d02282f7cd | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 41baa86b6c802cdc6ab8ff2d46c083c9be93de81 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 37a1a2e6eeeb101285cd34e12e48a881524701aa | 2.6.12
- linux_kernel< 4.9.311 | ≥ 4.10, < 4.14.276 | ≥ 4.15, < 4.19.238 | ≥ 4.20, < 5.4.189 | ≥ 5.5, < 5.10.110 | ≥ 5.11, < 5.15.33 | ≥ 5.16, < 5.16.19 | ≥ 5.17, < 5.17.2
Debian1 product
- linux< 5.17.3-1
3 vendors · 109 products
