CVE-2022-48938: CDC-NCM: avoid overflow in sanity checking
Vulnerability summary
CVE-2022-48938 is a medium (CVSS 5.5) Integer Overflow or Wraparound vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.6% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 19 · Related 19Timeline
- 22-08-2024PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: CDC-NCM: avoid overflow in sanity checking A broken device may give an extreme offset like 0xFFF0 and a reasonable length for a fragment. In the sanity check as formulated now, this will create an integer overflow, defeating the sanity check. Both offset and offset + len need to be checked in such a manner that no overflow can occur. And those quantities should be unsigned.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
12%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.21% 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.
Ubuntu100 products
- linuxAll versions (No fix recorded) | < 4.4.0-261.295 | < 4.15.0-231.243 | < 5.4.0-202.222
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1138.144 | < 4.4.0-1176.191 | < 4.15.0-1175.188 | < 5.4.0-1136.146
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6, < a612395c7631918e0e10ea48b9ce5ab4340f26a6 | ≥ a270ca35a9499b58366d696d3290eaa4697a42db, < 9957fbf34f52a4d8945d1bf39aae400ef9a11246 | ≥ 0fa81b304a7973a499f844176ca031109487dd31, < 69560efa001397ebb8dc1c3e6a3ce00302bb9f7f | ≥ 0fa81b304a7973a499f844176ca031109487dd31, < 49909c9f8458cacb5b241106cba65aba5a6d8f4c | ≥ 0fa81b304a7973a499f844176ca031109487dd31, < 7b737e47b87589031f0d4657f6d7b0b770474925 | ≥ 0fa81b304a7973a499f844176ca031109487dd31, < 8d2b1a1ec9f559d30b724877da4ce592edc41fdc | 8cf7db86a8984ffa3a3388a8df12bc0aa4c79bd7 | ≥ 4.19.285, < 4.19.323 | ≥ 5.4.245, < 5.4.285 | ≥ 4.14.317, < 4.15 | 5.7
- linux_kernel< 5.10.103 | ≥ 5.11, < 5.15.26 | ≥ 5.16, < 5.16.12
Debian1 product
- linux< 5.16.12-1
3 vendors · 103 products
