🛡️ CVE-2023-52449 on Ubuntu — linux

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

In the Linux kernel, the following vulnerability has been resolved: mtd: Fix gluebi NULL pointer dereference caused by ftl notifier If both ftl.ko and gluebi.ko are loaded, the notifier of ftl triggers NULL pointer dereference when trying to access ‘gluebi->desc’ in gluebi_read(). ubi_gluebi_init ubi_register_volume_notifier ubi_enumerate_volumes ubi_notify_all gluebi_notify nb->notifier_call() gluebi_create mtd_device_register mtd_device_parse_register add_mtd_device blktrans_notify_add not->add() ftl_add_mtd tr->add_mtd() scan_header mtd_read mtd_read_oob mtd_read_oob_std gluebi_read mtd->read() gluebi->desc - NULL Detailed reproduction information available at the Link [1], In the normal case, obtain gluebi->desc in the gluebi_get_device(), and access gluebi->desc in the gluebi_read(). However, gluebi_get_device() is not executed in advance in the ftl_add_mtd() process, which leads to NULL pointer dereference. The solution for the gluebi module is to run jffs2 on the UBI volume without considering working with ftl or mtdblock [2]. Therefore, this problem can be avoided by preventing gluebi from creating the mtdblock device after creating mtd partition of the type MTD_UBIVOLUME.

Distribution advisory

This page covers CVE-2023-52449 as tracked by Ubuntu, for the package linux. The fix is available in version 5.15.0-102.112; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack vector: Local — a local account, shell or session on the host is needed.
Attack complexity: Low — the attack works reliably, with no preparation.
Privileges required: Low — an ordinary user account is enough.
User interaction: None — nobody has to be tricked into anything.
Scope: Unchanged — the damage stays inside the vulnerable component.
Confidentiality impact: None.
Integrity impact: None.
Availability impact: High — total loss, or loss the attacker controls.

Affected software

UBUNTU-CVE-2023-52449 is recorded against 117 packages.

linux (fixed in 5.15.0-102.112)
linux-allwinner-5.19
linux-aws (fixed in 5.15.0-1057.63)
linux-aws-5.0
linux-aws-5.11
linux-aws-5.13
linux-aws-5.15 (fixed in 5.15.0-1057.63~20.04.1)
linux-aws-5.19
linux-aws-5.3
linux-aws-5.4 (fixed in 5.4.0-1122.132~18.04.1)
linux-aws-5.8
linux-aws-6.2
linux-aws-6.5
linux-aws-fips (fixed in 5.15.0-1057.63+fips1)
linux-aws-hwe (fixed in 4.15.0-1170.183~16.04.1)
linux-azure (fixed in 5.15.0-1060.69)
linux-azure-4.15 (fixed in 4.15.0-1179.194)
linux-azure-5.11
linux-azure-5.13
linux-azure-5.15 (fixed in 5.15.0-1060.69~20.04.1)
linux-azure-5.19
linux-azure-5.3
linux-azure-5.4 (fixed in 5.4.0-1127.134~18.04.1)
linux-azure-5.8

Show the remaining 93 packages

linux-azure-6.2
linux-azure-6.5 (fixed in 6.5.0-1022.23~22.04.1)
linux-azure-edge
linux-azure-fde
linux-azure-fde-5.19
linux-azure-fde-6.2
linux-azure-fde-6.8
linux-azure-fips (fixed in 5.15.0-1060.69+fips1)
linux-bluefield
linux-fips (fixed in 5.15.0-102.112+fips1)
linux-gcp (fixed in 5.15.0-1055.63)
linux-gcp-4.15 (fixed in 4.15.0-1164.181)
linux-gcp-5.11
linux-gcp-5.13
linux-gcp-5.15 (fixed in 5.15.0-1055.63~20.04.1)
linux-gcp-5.19
linux-gcp-5.3
linux-gcp-5.4 (fixed in 5.4.0-1126.135~18.04.1)
linux-gcp-5.8
linux-gcp-6.2
linux-gcp-6.5 (fixed in 6.5.0-1022.24~22.04.1)
linux-gcp-fips (fixed in 5.15.0-1055.63+fips2)
linux-gke (fixed in 5.15.0-1054.59)
linux-gke-4.15
linux-gke-5.15
linux-gke-5.4
linux-gkeop (fixed in 5.15.0-1040.46)
linux-gkeop-5.15 (fixed in 5.15.0-1040.46~20.04.1)
linux-gkeop-5.4
linux-hwe
linux-hwe-5.11
linux-hwe-5.13
linux-hwe-5.15 (fixed in 5.15.0-102.112~20.04.1)
linux-hwe-5.19
linux-hwe-5.4 (fixed in 5.4.0-175.195~18.04.1)
linux-hwe-5.8
linux-hwe-6.2
linux-hwe-6.5 (fixed in 6.5.0-41.41~22.04.2)
linux-hwe-edge
linux-ibm (fixed in 5.15.0-1050.53)
linux-ibm-5.15 (fixed in 5.15.0-1050.53~20.04.1)
linux-ibm-5.4 (fixed in 5.4.0-1069.74~18.04.1)
linux-intel-5.13
linux-intel-iot-realtime (fixed in 5.15.0-1050.52)
linux-intel-iotg (fixed in 5.15.0-1052.58)
linux-intel-iotg-5.15 (fixed in 5.15.0-1052.58~20.04.1)
linux-iot (fixed in 5.4.0-1034.35)
linux-kvm (fixed in 5.15.0-1054.59)
linux-lowlatency (fixed in 5.15.0-102.112)
linux-lowlatency-hwe-5.15 (fixed in 5.15.0-102.112~20.04.1)
linux-lowlatency-hwe-5.19
linux-lowlatency-hwe-6.2
linux-lowlatency-hwe-6.5 (fixed in 6.5.0-41.41.1~22.04.1)
linux-lts-xenial (fixed in 4.4.0-257.291~14.04.1)
linux-nvidia (fixed in 5.15.0-1048.48)
linux-nvidia-6.2
linux-nvidia-6.5 (fixed in 6.5.0-1021.22)
linux-nvidia-tegra (fixed in 5.15.0-1025.25)
linux-nvidia-tegra-5.15 (fixed in 5.15.0-1025.25~20.04.1)
linux-nvidia-tegra-igx (fixed in 5.15.0-1012.12)
linux-oem
linux-oem-5.10
linux-oem-5.13
linux-oem-5.14
linux-oem-5.17
linux-oem-5.6
linux-oem-6.0
linux-oem-6.1 (fixed in 6.1.0-1035.35)
linux-oem-6.5 (fixed in 6.5.0-1024.25)
linux-oracle (fixed in 5.15.0-1055.61)
linux-oracle-5.0
linux-oracle-5.11
linux-oracle-5.13
linux-oracle-5.15 (fixed in 5.15.0-1055.61~20.04.1)
linux-oracle-5.3
linux-oracle-5.4 (fixed in 5.4.0-1121.130~18.04.1)
linux-oracle-5.8
linux-oracle-6.5 (fixed in 6.5.0-1024.24~22.04.1)
linux-raspi (fixed in 5.15.0-1050.53)
linux-raspi-5.4 (fixed in 5.4.0-1106.118~18.04.1)
linux-raspi-realtime (fixed in 6.8.0-2001.1)
linux-raspi2
linux-realtime (fixed in 5.15.0-1058.66)
linux-riscv
linux-riscv-5.11
linux-riscv-5.15 (fixed in 5.15.0-1053.57~20.04.1)
linux-riscv-5.19
linux-riscv-5.8
linux-riscv-6.5 (fixed in 6.5.0-40.40.1~22.04.1)
linux-starfive-5.19
linux-starfive-6.2
linux-starfive-6.5 (fixed in 6.5.0-1015.16~22.04.1)
linux-xilinx-zynqmp (fixed in 5.15.0-1030.34)

Timeline and source

Published on 22 February 2024 and last revised on 18 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

Other advisories for this package

linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

DEBIAN-CVE-2022-4994 (published 30 Jul 2026)
CVE-2026-35233 (4.4 Medium, published 1 May 2026)
CVE-2026-21996 (3.3 Low, published 1 May 2026)
CVE-2026-21991 (5.5 Medium, published 16 Mar 2026)
CGA-w6xv-3fg4-grm5 (published 29 Jan 2026)
CGA-mcwh-q4vm-9f29 (published 29 Jan 2026)
CGA-2qp7-6757-fmgc (published 7 Jan 2026)
CGA-9p62-x2f6-7rmw (published 7 Jan 2026)

CVE-2023-52449 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

BellSoft — BELL-CVE-2023-52449 Base record — CVE-2023-52449 Debian — DEBIAN-CVE-2023-52449

Details

Severity Unknown

CVSS Score N/A

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

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2024-02-22

Updated 2026-08-20

Modified 2026-08-18

Fix URL N/A

Affected Packages

Software	From version	Fixed in
linux	—	5.15.0-102.112
linux-allwinner-5.19	—	—
linux-aws	—	5.15.0-1057.63
linux-aws-5.0	—	—
linux-aws-5.11	—	—
linux-aws-5.13	—	—
linux-aws-5.15	—	5.15.0-1057.63~20.04.1
linux-aws-5.19	—	—
linux-aws-5.3	—	—
linux-aws-5.4	—	5.4.0-1122.132~18.04.1
linux-aws-5.8	—	—
linux-aws-6.2	—	—
linux-aws-6.5	—	—
linux-aws-fips	—	5.15.0-1057.63+fips1
linux-aws-hwe	—	4.15.0-1170.183~16.04.1
linux-azure	—	5.15.0-1060.69
linux-azure-4.15	—	4.15.0-1179.194
linux-azure-5.11	—	—
linux-azure-5.13	—	—
linux-azure-5.15	—	5.15.0-1060.69~20.04.1
linux-azure-5.19	—	—
linux-azure-5.3	—	—
linux-azure-5.4	—	5.4.0-1127.134~18.04.1
linux-azure-5.8	—	—
linux-azure-6.2	—	—
linux-azure-6.5	—	6.5.0-1022.23~22.04.1
linux-azure-edge	—	—
linux-azure-fde	—	—
linux-azure-fde-5.19	—	—
linux-azure-fde-6.2	—	—
linux-azure-fde-6.8	—	—
linux-azure-fips	—	5.15.0-1060.69+fips1
linux-bluefield	—	—
linux-fips	—	5.15.0-102.112+fips1
linux-gcp	—	5.15.0-1055.63
linux-gcp-4.15	—	4.15.0-1164.181
linux-gcp-5.11	—	—
linux-gcp-5.13	—	—
linux-gcp-5.15	—	5.15.0-1055.63~20.04.1
linux-gcp-5.19	—	—
linux-gcp-5.3	—	—
linux-gcp-5.4	—	5.4.0-1126.135~18.04.1
linux-gcp-5.8	—	—
linux-gcp-6.2	—	—
linux-gcp-6.5	—	6.5.0-1022.24~22.04.1
linux-gcp-fips	—	5.15.0-1055.63+fips2
linux-gke	—	5.15.0-1054.59
linux-gke-4.15	—	—
linux-gke-5.15	—	—
linux-gke-5.4	—	—
linux-gkeop	—	5.15.0-1040.46
linux-gkeop-5.15	—	5.15.0-1040.46~20.04.1
linux-gkeop-5.4	—	—
linux-hwe	—	—
linux-hwe-5.11	—	—
linux-hwe-5.13	—	—
linux-hwe-5.15	—	5.15.0-102.112~20.04.1
linux-hwe-5.19	—	—
linux-hwe-5.4	—	5.4.0-175.195~18.04.1
linux-hwe-5.8	—	—
linux-hwe-6.2	—	—
linux-hwe-6.5	—	6.5.0-41.41~22.04.2
linux-hwe-edge	—	—
linux-ibm	—	5.15.0-1050.53
linux-ibm-5.15	—	5.15.0-1050.53~20.04.1
linux-ibm-5.4	—	5.4.0-1069.74~18.04.1
linux-intel-5.13	—	—
linux-intel-iot-realtime	—	5.15.0-1050.52
linux-intel-iotg	—	5.15.0-1052.58
linux-intel-iotg-5.15	—	5.15.0-1052.58~20.04.1
linux-iot	—	5.4.0-1034.35
linux-kvm	—	5.15.0-1054.59
linux-lowlatency	—	5.15.0-102.112
linux-lowlatency-hwe-5.15	—	5.15.0-102.112~20.04.1
linux-lowlatency-hwe-5.19	—	—
linux-lowlatency-hwe-6.2	—	—
linux-lowlatency-hwe-6.5	—	6.5.0-41.41.1~22.04.1
linux-lts-xenial	—	4.4.0-257.291~14.04.1
linux-nvidia	—	5.15.0-1048.48
linux-nvidia-6.2	—	—
linux-nvidia-6.5	—	6.5.0-1021.22
linux-nvidia-tegra	—	5.15.0-1025.25
linux-nvidia-tegra-5.15	—	5.15.0-1025.25~20.04.1
linux-nvidia-tegra-igx	—	5.15.0-1012.12
linux-oem	—	—
linux-oem-5.10	—	—
linux-oem-5.13	—	—
linux-oem-5.14	—	—
linux-oem-5.17	—	—
linux-oem-5.6	—	—
linux-oem-6.0	—	—
linux-oem-6.1	—	6.1.0-1035.35
linux-oem-6.5	—	6.5.0-1024.25
linux-oracle	—	5.15.0-1055.61
linux-oracle-5.0	—	—
linux-oracle-5.11	—	—
linux-oracle-5.13	—	—
linux-oracle-5.15	—	5.15.0-1055.61~20.04.1
linux-oracle-5.3	—	—
linux-oracle-5.4	—	5.4.0-1121.130~18.04.1
linux-oracle-5.8	—	—
linux-oracle-6.5	—	6.5.0-1024.24~22.04.1
linux-raspi	—	5.15.0-1050.53
linux-raspi-5.4	—	5.4.0-1106.118~18.04.1
linux-raspi-realtime	—	6.8.0-2001.1
linux-raspi2	—	—
linux-realtime	—	5.15.0-1058.66
linux-riscv	—	—
linux-riscv-5.11	—	—
linux-riscv-5.15	—	5.15.0-1053.57~20.04.1
linux-riscv-5.19	—	—
linux-riscv-5.8	—	—
linux-riscv-6.5	—	6.5.0-40.40.1~22.04.1
linux-starfive-5.19	—	—
linux-starfive-6.2	—	—
linux-starfive-6.5	—	6.5.0-1015.16~22.04.1
linux-xilinx-zynqmp	—	5.15.0-1030.34

References

REPORT https://ubuntu.com/security/CVE-2023-52449

REPORT https://git.kernel.org/stable/c/aeba358bcc8ffddf9b4a9bd0e5ec9eb338d46022

REPORT https://git.kernel.org/stable/c/1bf4fe14e97cda621522eb2f28b0a4e87c5b0745

REPORT https://git.kernel.org/stable/c/001a3f59d8c914ef8273461d4bf495df384cc5f8

REPORT https://git.kernel.org/stable/c/d8ac2537763b54d278b80b2b080e1652523c7d4c

REPORT https://git.kernel.org/stable/c/5389407bba1eab1266c6d83e226fb0840cb98dd5

REPORT https://git.kernel.org/stable/c/cfd7c9d260dc0a3baaea05a122a19ab91e193c65

REPORT https://git.kernel.org/stable/c/b36aaa64d58aaa2f2cbc8275e89bae76a2b6c3dc

REPORT https://git.kernel.org/stable/c/a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6

ADVISORY https://ubuntu.com/security/notices/USN-6688-1

ADVISORY https://ubuntu.com/security/notices/USN-6725-1

ADVISORY https://ubuntu.com/security/notices/USN-6726-1

REPORT https://www.cve.org/CVERecord?id=CVE-2023-52449

ADVISORY https://ubuntu.com/security/notices/USN-6725-2

ADVISORY https://ubuntu.com/security/notices/USN-6726-2

ADVISORY https://ubuntu.com/security/notices/USN-6726-3

ADVISORY https://ubuntu.com/security/notices/USN-6818-1

ADVISORY https://ubuntu.com/security/notices/USN-6819-1

ADVISORY https://ubuntu.com/security/notices/USN-6818-2

ADVISORY https://ubuntu.com/security/notices/USN-6819-2

ADVISORY https://ubuntu.com/security/notices/USN-6819-3

ADVISORY https://ubuntu.com/security/notices/USN-6818-3

ADVISORY https://ubuntu.com/security/notices/USN-6818-4

ADVISORY https://ubuntu.com/security/notices/USN-6819-4

ADVISORY https://ubuntu.com/security/notices/USN-6926-1

ADVISORY https://ubuntu.com/security/notices/USN-6938-1

ADVISORY https://ubuntu.com/security/notices/USN-6926-2

ADVISORY https://ubuntu.com/security/notices/USN-6926-3

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🛡️ CVE-2023-52449 on Ubuntu — linux

Description

Distribution advisory

How this vulnerability can be exploited

CVSS metrics in full

Affected software

Timeline and source

References

Other advisories for this package

CVE-2023-52449 on other distributions

Track new vulnerabilities in linux

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Company

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