CVE-2022-50859: cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message
Vulnerability summary
CVE-2022-50859 is a medium (CVSS 5.3) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.7% of scored vulnerabilities.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 30-12-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message Commit d5c7076b772a ("smb3: add smb3.1.1 to default dialect list") extend the dialects from 3 to 4, but forget to decrease the extended length when specific the dialect, then the message length is larger than expected. This maybe leak some info through network because not initialize the message body. After apply this patch, the VALIDATE_NEGOTIATE_INFO message length is reduced from 28 bytes to 26 bytes.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% 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 causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu116 products
- linux< 5.4.0-139.156 | < 5.15.0-60.66
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1096.104 | < 5.15.0-1030.34
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.0.3-1
Linux1 product
- linux≥ d5c7076b772ad7dcdb92303397b36aee8fa0d25d, < d0050ec3ebbcb3451df9a65b8460be9b9e02e80c | ≥ d5c7076b772ad7dcdb92303397b36aee8fa0d25d, < 9312e04b6c6bc46354ecd0cc82052a2b3df0b529 | ≥ d5c7076b772ad7dcdb92303397b36aee8fa0d25d, < 60480291c1fcafad8425d93f771b5bcc2bd398b4 | ≥ d5c7076b772ad7dcdb92303397b36aee8fa0d25d, < 943eb0ede74ecd609fdfd3f0b83e0d237613e526 | ≥ d5c7076b772ad7dcdb92303397b36aee8fa0d25d, < fada9b8c95c77bb46b89e18117405bc90fce9f74 | ≥ d5c7076b772ad7dcdb92303397b36aee8fa0d25d, < e98ecc6e94f4e6d21c06660b0f336df02836694f | 5.0
3 vendors · 118 products
