CVE-2022-48627: vt: fix memory overlapping when deleting chars in the buffer
Vulnerability summary
CVE-2022-48627 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.3% 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 24 · Related 17Timeline
- 02-03-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: vt: fix memory overlapping when deleting chars in the buffer A memory overlapping copy occurs when deleting a long line. This memory overlapping copy can cause data corruption when scr_memcpyw is optimized to memcpy because memcpy does not ensure its behavior if the destination buffer overlaps with the source buffer. The line buffer is not always broken, because the memcpy utilizes the hardware acceleration, whose result is not deterministic. Fix this problem by using replacing the scr_memcpyw with scr_memmovew.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.28%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.28% 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, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu102 products
- linuxAll versions (No fix recorded) | < 5.4.0-189.209 | < 5.15.0-50.56
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.4.0-1128.138 | < 5.15.0-1021.25
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 5.18.14-1
- debian_linuxEOL10.0
Linux2 products
- linux≥ 81732c3b2fede049a692e58a7ceabb6d18ffb18c, < c8686c014b5e872ba7e334f33ca553f14446fc29 | ≥ 81732c3b2fede049a692e58a7ceabb6d18ffb18c, < 815be99d934e3292906536275f2b8d5131cdf52c | ≥ 81732c3b2fede049a692e58a7ceabb6d18ffb18c, < bfee93c9a6c395f9aa62268f1cedf64999844926 | ≥ 81732c3b2fede049a692e58a7ceabb6d18ffb18c, < 57964a5710252bc82fe22d9fa98c180c58c20244 | ≥ 81732c3b2fede049a692e58a7ceabb6d18ffb18c, < 14d2cc21ca622310babf373e3a8f0b40acfe8265 | ≥ 81732c3b2fede049a692e58a7ceabb6d18ffb18c, < 39cdb68c64d84e71a4a717000b6e5de208ee60cc | 3.7
- linux_kernel≥ 3.7, ≤ 4.19.312 | ≥ 4.20, < 5.4.274 | ≥ 5.5, < 5.10.132 | ≥ 5.11, < 5.15.56 | ≥ 5.16, < 5.18.13 | 5.19:rc1 | 5.19:rc2 | 5.19:rc3 | 5.19:rc4 | 5.19:rc5 | 5.19:rc6
3 vendors · 106 products
