CVE-2024-35823 vt: fix unicode buffer corruption when deleting characters

2024-05-1713:23:25

Linux

www.cve.org

linux kernel

vulnerability

unicode buffer

fix

memory overlapping

memcpy

memmove

cve

6.8 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%

JSON

In the Linux kernel, the following vulnerability has been resolved:

vt: fix unicode buffer corruption when deleting characters

This is the same issue that was fixed for the VGA text buffer in commit
39cdb68c64d8 (“vt: fix memory overlapping when deleting chars in the
buffer”). The cure is also the same i.e. replace memcpy() with memmove()
due to the overlaping buffers.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/tty/vt/vt.c"
    ],
    "versions": [
      {
        "version": "81732c3b2fed",
        "lessThan": "fc7dfe3d123f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "81732c3b2fed",
        "lessThan": "ff7342090c1e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "81732c3b2fed",
        "lessThan": "1ce408f75ccf",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "81732c3b2fed",
        "lessThan": "0190d19d7651",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "81732c3b2fed",
        "lessThan": "994a1e583c0c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "81732c3b2fed",
        "lessThan": "7529cbd8b5f6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "81732c3b2fed",
        "lessThan": "2933b1e4757a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "81732c3b2fed",
        "lessThan": "1581dafaf0d3",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/tty/vt/vt.c"
    ],
    "versions": [
      {
        "version": "3.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.7",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.312",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.274",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.215",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.154",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.84",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.24",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.12",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]