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Fencer Vulns
medium 5.5

CVE-2022-48627 json

vt: fix memory overlapping when deleting chars in the buffer

published 2024-03-02 2 y ago modified 2026-06-17 4 mo ago also EUVD-2022-51322

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

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.

Patch / fix

  • Linux Linux 4.19.312, 5.4.274, 5.10.132, 5.15.56, 5.18.13, 5.19
  • linux Debian 14, Debian 13, Debian 12 5.18.14-1

debian advisories DEBIAN-CVE-2022-48627

  • linux Ubuntu 20.04 LTS 5.4.0-189.209
  • linux Ubuntu 22.04 LTS 5.15.0-50.56
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1128.138
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1021.25
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1132.141
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1019.25
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1017.20
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1075.80

ubuntu advisories UBUNTU-CVE-2022-48627

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-427.26.1.el9_4
  • rv RHEL 9 5.14.0-427.26.1.el9_4
  • perf RHEL 9 5.14.0-427.26.1.el9_4
  • rtla RHEL 9 5.14.0-427.26.1.el9_4
  • bpftool RHEL 9 7.3.0-427.26.1.el9_4
  • libperf RHEL 9 5.14.0-427.26.1.el9_4
  • kernel-rt RHEL 9 5.14.0-427.26.1.el9_4
  • kernel-64k RHEL 9 5.14.0-427.26.1.el9_4

red hat advisories RHSA-2024:4583RHSA-2024:3627RHSA-2024:3618RHSA-2024:5255RHSA-2024:4554RHSA-2024:4533

  • dtb-aarch64 openSUSE Leap 15.5 5.14.21-150500.55.59.1
  • kernel-64kb SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.59.1
  • kernel-syms SLE Module for Development Tools 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.59.1
  • kernel-obs-qa openSUSE Leap 15.5 5.14.21-150500.55.59.1
  • kernel-source SLE Module for Development Tools 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.59.1
  • kernel-default SLE Workstation Extension 15 SP5, SLE Module for Legacy 15 SP5, SLE Module for Basesystem 15 SP5 +4 more 5.14.21-150500.55.59.1
  • kernel-kvmsmall openSUSE Leap 15.5 5.14.21-150500.55.59.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.59.1

suse advisories SUSE-SU-2024:1480-1SUSE-SU-2024:1466-1SUSE-SU-2024:0977-1SUSE-SU-2024:0976-1SUSE-SU-2024:0975-1SUSE-SU-2024:0926-1

  • kernel AlmaLinux 9 5.14.0-427.26.1.el9_4
  • rv AlmaLinux 9 5.14.0-427.26.1.el9_4
  • perf AlmaLinux 9 5.14.0-427.26.1.el9_4
  • rtla AlmaLinux 9 5.14.0-427.26.1.el9_4
  • bpftool AlmaLinux 9 7.3.0-427.26.1.el9_4
  • libperf AlmaLinux 9 5.14.0-427.26.1.el9_4
  • kernel-rt AlmaLinux 9 5.14.0-427.26.1.el9_4
  • kernel-64k AlmaLinux 9 5.14.0-427.26.1.el9_4

almalinux advisories ALSA-2024:4583ALSA-2024:3618ALSA-2024:3627

  • kernel Rocky Linux 9 5.14.0-427.26.1.el9_4
  • kernel-rt Rocky Linux 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel Rocky Linux 8 4.18.0-553.5.1.el8_10

rocky linux advisories RLSA-2024:4583RLSA-2024:3627RLSA-2024:3618

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-48627 updated cvss 4.4

kernel: vt: fix memory overlapping when deleting chars in the buffer

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: workaround, no fix planned “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.67.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.67.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.67.1.el8_8
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:5255
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.73.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.73.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.73.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.73.1.el9_2
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4533
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.26.1.el9_4, perf 5.14.0-427.26.1.el9_4, rtla 5.14.0-427.26.1.el9_4, kernel-devel-matched 5.14.0-427.26.1.el9_4, kernel-64k-devel-matched 5.14.0-427.26.1.el9_4, kernel-debug-devel-matched 5.14.0-427.26.1.el9_4, +6 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4583
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.73.1.el9_2, rtla 5.14.0-284.73.1.el9_2, kernel-devel-matched 5.14.0-284.73.1.el9_2, kernel-64k-devel-matched 5.14.0-284.73.1.el9_2, kernel-debug-devel-matched 5.14.0-284.73.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.73.1.el9_2, +5 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4533
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.5.1.el8_10, kernel 4.18.0-553.5.1.el8_10, bpftool 4.18.0-553.5.1.el8_10, kernel-core 4.18.0-553.5.1.el8_10, kernel-tools 4.18.0-553.5.1.el8_10, python3-perf 4.18.0-553.5.1.el8_10, +15 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:3618
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.26.1.el9_4, kernel 5.14.0-427.26.1.el9_4, kernel-64k 5.14.0-427.26.1.el9_4, kernel-core 5.14.0-427.26.1.el9_4, kernel-tools 5.14.0-427.26.1.el9_4, python3-perf 5.14.0-427.26.1.el9_4, +28 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4583
show 10 more
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.67.1.el8_8, kernel 4.18.0-477.67.1.el8_8, bpftool 4.18.0-477.67.1.el8_8, kernel-core 4.18.0-477.67.1.el8_8, kernel-tools 4.18.0-477.67.1.el8_8, python3-perf 4.18.0-477.67.1.el8_8, +15 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:5255
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.73.1.el9_2, kernel 5.14.0-284.73.1.el9_2, kernel-64k 5.14.0-284.73.1.el9_2, kernel-core 5.14.0-284.73.1.el9_2, kernel-tools 5.14.0-284.73.1.el9_2, python3-perf 5.14.0-284.73.1.el9_2, +28 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4533
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.5.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.5.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.5.1.el8_10
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:3618
  • Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.26.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.26.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.26.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.26.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.26.1.el9_4
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4583
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-kvm 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-kvm 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-core 4.18.0-553.5.1.rt7.346.el8_10, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:3627
  • Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.26.1.el9_4, kernel-rt-kvm 5.14.0-427.26.1.el9_4, kernel-rt-core 5.14.0-427.26.1.el9_4, kernel-rt-modules 5.14.0-427.26.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.26.1.el9_4, kernel-rt-debug-core 5.14.0-427.26.1.el9_4, +6 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4583
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-core 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-modules 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-core 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-modules-core 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-modules 5.14.0-284.73.1.rt14.358.el9_2, +4 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-kvm 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-core 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-modules 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-kvm 5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-core 5.14.0-284.73.1.rt14.358.el9_2, +6 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4554
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules-extra 4.18.0-553.5.1.rt7.346.el8_10, +2 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:3627
  • Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.26.1.el9_4, kernel-rt-core 5.14.0-427.26.1.el9_4, kernel-rt-modules 5.14.0-427.26.1.el9_4, kernel-rt-debug-core 5.14.0-427.26.1.el9_4, kernel-rt-modules-core 5.14.0-427.26.1.el9_4, kernel-rt-debug-modules 5.14.0-427.26.1.el9_4, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4583
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.73.1.el9_2 Red Hat Enterprise Linux BaseOS EUS (v.8.8) kernel-headers 4.18.0-477.67.1.el8_8, kernel-cross-headers 4.18.0-477.67.1.el8_8
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.