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CVE-2022-48627· NVD / CVE Program· CNA Linux

vt: fix memory overlapping when deleting chars in the buffer

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.27% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 14d2cc21ca622310babf373e3a8f0b40acfe8265, 39cdb68c64d84e71a4a717000b6e5de208ee60cc, 57964a5710252bc82fe22d9fa98c180c58c20244.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 14d2cc21ca622310babf373e3a8f0b40acfe8265, 39cdb68c64d84e71a4a717000b6e5de208ee60cc, 57964a5710252bc82fe22d9fa98c180c58c20244 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Mar 2, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 18th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-48627

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • linux linux kernel4.20 and later · before 5.4.274
  • linux linux kernel5.5 and later · before 5.10.132
  • linux linux kernel3.7 and later · up to 4.19.312 inclusive
  • linux linux kernel5.16 and later · before 5.18.13
  • linux linux kernel5.11 and later · before 5.15.56
  • linux linux kernel5.19

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.7affected
    • 81732c3b2fede049a692e58a7ceabb6d18ffb18c and later · before c8686c014b5e872ba7e334f33ca553f14446fc29affected · git
    • 81732c3b2fede049a692e58a7ceabb6d18ffb18c and later · before 815be99d934e3292906536275f2b8d5131cdf52caffected · git
    • 81732c3b2fede049a692e58a7ceabb6d18ffb18c and later · before bfee93c9a6c395f9aa62268f1cedf64999844926affected · git
    • 81732c3b2fede049a692e58a7ceabb6d18ffb18c and later · before 57964a5710252bc82fe22d9fa98c180c58c20244affected · git
    • 81732c3b2fede049a692e58a7ceabb6d18ffb18c and later · before 14d2cc21ca622310babf373e3a8f0b40acfe8265affected · git
    • 81732c3b2fede049a692e58a7ceabb6d18ffb18c and later · before 39cdb68c64d84e71a4a717000b6e5de208ee60ccaffected · git
    • before 3.7not affected · semver
    • 4.19.312 and later · up to and including 4.19.*not affected · semver
    • 5.4.274 and later · up to and including 5.4.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.5.1.el8_104.18.0-553.5.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-kvmbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.5.1.rt7.346.el8_104.18.0-553.5.1.rt7.346.el8_10

+96

Other highest-scoring records for the same primary product.

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    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now
  • CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
    77This week
  • CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV
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  • CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV
    77This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux14d2cc21ca622310babf373e3a8f0b40acfe8265Vendor (CNA)
Linux Linux39cdb68c64d84e71a4a717000b6e5de208ee60ccVendor (CNA)
Linux Linux57964a5710252bc82fe22d9fa98c180c58c20244Vendor (CNA)
Linux Linux815be99d934e3292906536275f2b8d5131cdf52cVendor (CNA)
Linux Linuxbfee93c9a6c395f9aa62268f1cedf64999844926Vendor (CNA)
Linux Linuxc8686c014b5e872ba7e334f33ca553f14446fc29Vendor (CNA)
almalinux:bpftool4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.5.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux5.18.14-1 · Debian:12Package registry (OSV)
opensuse:kernel-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-source-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
red hat:bpftool0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.5.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+15

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

All records