🛡️ CVE-2023-52622 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: ext4: avoid online resizing failures due to oversized flex bg When we online resize an ext4 filesystem with a oversized flexbg_size, mkfs.ext4 -F -G 67108864 $dev -b 4096 100M mount $dev $dir resize2fs $dev 16G the following WARN_ON is triggered: ================================================================== WARNING: CPU: 0 PID: 427 at mm/page_alloc.c:4402 __alloc_pages+0x411/0x550 Modules linked in: sg(E) CPU: 0 PID: 427 Comm: resize2fs Tainted: G E 6.6.0-rc5+ #314 RIP: 0010:__alloc_pages+0x411/0x550 Call Trace: <TASK> __kmalloc_large_node+0xa2/0x200 __kmalloc+0x16e/0x290 ext4_resize_fs+0x481/0xd80 __ext4_ioctl+0x1616/0x1d90 ext4_ioctl+0x12/0x20 __x64_sys_ioctl+0xf0/0x150 do_syscall_64+0x3b/0x90 ================================================================== This is because flexbg_size is too large and the size of the new_group_data array to be allocated exceeds MAX_ORDER. Currently, the minimum value of MAX_ORDER is 8, the minimum value of PAGE_SIZE is 4096, the corresponding maximum number of groups that can be allocated is: (PAGE_SIZE << MAX_ORDER) / sizeof(struct ext4_new_group_data) ≈ 21845 And the value that is down-aligned to the power of 2 is 16384. Therefore, this value is defined as MAX_RESIZE_BG, and the number of groups added each time does not exceed this value during resizing, and is added multiple times to complete the online resizing. The difference is that the metadata in a flex_bg may be more dispersed.

Distribution advisory

This page covers CVE-2023-52622 as tracked by Ubuntu, for the package linux. The fix is available in version 5.15.0-106.116; 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.

Weakness class

UBUNTU-CVE-2023-52622 is classified as CWE-770: Allocation of Resources Without Limits. Resources are allocated on request with no cap, so a client can exhaust them.

Affected software

UBUNTU-CVE-2023-52622 is recorded against 118 packages.

linux (fixed in 5.15.0-106.116)
linux-allwinner-5.19
linux-aws (fixed in 5.15.0-1061.67)
linux-aws-5.0
linux-aws-5.11
linux-aws-5.13
linux-aws-5.15 (fixed in 5.15.0-1061.67~20.04.1)
linux-aws-5.19
linux-aws-5.3
linux-aws-5.4 (fixed in 5.4.0-1124.134~18.04.1)
linux-aws-5.8
linux-aws-6.2
linux-aws-6.5
linux-aws-fips (fixed in 5.15.0-1061.67+fips1)
linux-aws-hwe
linux-azure (fixed in 5.15.0-1063.72)
linux-azure-4.15
linux-azure-5.11
linux-azure-5.13
linux-azure-5.15 (fixed in 5.15.0-1063.72~20.04.1)
linux-azure-5.19
linux-azure-5.3
linux-azure-5.4 (fixed in 5.4.0-1129.136~18.04.1)
linux-azure-5.8

Show the remaining 94 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-5.15 (fixed in 5.15.0-1114.123~20.04.1)
linux-azure-fde-5.19
linux-azure-fde-6.2
linux-azure-fde-6.8
linux-azure-fips (fixed in 5.15.0-1063.72+fips1)
linux-bluefield
linux-fips (fixed in 5.15.0-106.116+fips1)
linux-gcp (fixed in 5.15.0-1059.67)
linux-gcp-4.15
linux-gcp-5.11
linux-gcp-5.13
linux-gcp-5.15 (fixed in 5.15.0-1059.67~20.04.1)
linux-gcp-5.19
linux-gcp-5.3
linux-gcp-5.4 (fixed in 5.4.0-1128.137~18.04.1)
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 5.15.0-1059.67+fips1)
linux-gke (fixed in 5.15.0-1058.63)
linux-gke-4.15
linux-gke-5.15
linux-gke-5.4
linux-gkeop (fixed in 5.15.0-1044.51)
linux-gkeop-5.15 (fixed in 5.15.0-1044.51~20.04.1)
linux-gkeop-5.4
linux-hwe
linux-hwe-5.11
linux-hwe-5.13
linux-hwe-5.15 (fixed in 5.15.0-106.116~20.04.1)
linux-hwe-5.19
linux-hwe-5.4 (fixed in 5.4.0-181.201~18.04.1)
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 5.15.0-1054.57)
linux-ibm-5.15 (fixed in 5.15.0-1054.57~20.04.1)
linux-ibm-5.4 (fixed in 5.4.0-1071.76~18.04.1)
linux-intel-5.13
linux-intel-iot-realtime (fixed in 5.15.0-1054.56)
linux-intel-iotg (fixed in 5.15.0-1057.63)
linux-intel-iotg-5.15 (fixed in 5.15.0-1058.64~20.04.1)
linux-iot (fixed in 5.4.0-1036.37)
linux-kvm (fixed in 5.15.0-1058.63)
linux-lowlatency (fixed in 5.15.0-106.116)
linux-lowlatency-hwe-5.15 (fixed in 5.15.0-106.116~20.04.1)
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
linux-nvidia (fixed in 5.15.0-1054.55)
linux-nvidia-6.2
linux-nvidia-6.5 (fixed in 6.5.0-1021.22)
linux-nvidia-tegra (fixed in 5.15.0-1026.26)
linux-nvidia-tegra-5.15 (fixed in 5.15.0-1027.27~20.04.1)
linux-nvidia-tegra-igx (fixed in 5.15.0-1015.15)
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
linux-oem-6.5 (fixed in 6.5.0-1024.25)
linux-oracle (fixed in 5.15.0-1059.65)
linux-oracle-5.0
linux-oracle-5.11
linux-oracle-5.13
linux-oracle-5.15 (fixed in 5.15.0-1059.65~20.04.1)
linux-oracle-5.3
linux-oracle-5.4 (fixed in 5.4.0-1123.132~18.04.1)
linux-oracle-5.8
linux-oracle-6.5 (fixed in 6.5.0-1024.24~22.04.1)
linux-raspi (fixed in 5.15.0-1054.57)
linux-raspi-5.4 (fixed in 5.4.0-1108.120~18.04.1)
linux-raspi-realtime (fixed in 6.8.0-2001.1)
linux-raspi2
linux-realtime (fixed in 5.15.0-1062.70)
linux-riscv
linux-riscv-5.11
linux-riscv-5.15 (fixed in 5.15.0-1057.61~20.04.1)
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 26 March 2024 and last revised on 19 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-mcwh-q4vm-9f29 (published 29 Jan 2026)
CGA-w6xv-3fg4-grm5 (published 29 Jan 2026)
CGA-7wmc-rrpx-535w (published 7 Jan 2026)
CGA-5g29-pc3v-86pw (published 7 Jan 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-770: Allocation of Resources Without Limits) in other software:

CVE-2026-49870 (5.9 Medium, published 19 Aug 2026)
CVE-2026-13076 (8.0 High, published 19 Aug 2026)
CVE-2026-13075 (8.0 High, published 19 Aug 2026)
CVE-2026-13074 (5.0 Medium, published 19 Aug 2026)
CVE-2026-53423 (published 18 Aug 2026)
CVE-2026-52732 (5.3 Medium, published 18 Aug 2026)
CVE-2026-39904 (8.0 High, published 18 Aug 2026)
CVE-2026-57497 (published 18 Aug 2026)

CVE-2023-52622 on other distributions

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

BellSoft — BELL-CVE-2023-52622 Base record — CVE-2023-52622 Debian — DEBIAN-CVE-2023-52622

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 2024-03-26

Updated 2026-08-20

Modified 2026-08-19

Fix URL N/A

Affected Packages

Software	From version	Fixed in
linux	—	5.15.0-106.116
linux-allwinner-5.19	—	—
linux-aws	—	5.15.0-1061.67
linux-aws-5.0	—	—
linux-aws-5.11	—	—
linux-aws-5.13	—	—
linux-aws-5.15	—	5.15.0-1061.67~20.04.1
linux-aws-5.19	—	—
linux-aws-5.3	—	—
linux-aws-5.4	—	5.4.0-1124.134~18.04.1
linux-aws-5.8	—	—
linux-aws-6.2	—	—
linux-aws-6.5	—	—
linux-aws-fips	—	5.15.0-1061.67+fips1
linux-aws-hwe	—	—
linux-azure	—	5.15.0-1063.72
linux-azure-4.15	—	—
linux-azure-5.11	—	—
linux-azure-5.13	—	—
linux-azure-5.15	—	5.15.0-1063.72~20.04.1
linux-azure-5.19	—	—
linux-azure-5.3	—	—
linux-azure-5.4	—	5.4.0-1129.136~18.04.1
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-5.15	—	5.15.0-1114.123~20.04.1
linux-azure-fde-5.19	—	—
linux-azure-fde-6.2	—	—
linux-azure-fde-6.8	—	—
linux-azure-fips	—	5.15.0-1063.72+fips1
linux-bluefield	—	—
linux-fips	—	5.15.0-106.116+fips1
linux-gcp	—	5.15.0-1059.67
linux-gcp-4.15	—	—
linux-gcp-5.11	—	—
linux-gcp-5.13	—	—
linux-gcp-5.15	—	5.15.0-1059.67~20.04.1
linux-gcp-5.19	—	—
linux-gcp-5.3	—	—
linux-gcp-5.4	—	5.4.0-1128.137~18.04.1
linux-gcp-5.8	—	—
linux-gcp-6.2	—	—
linux-gcp-6.5	—	6.5.0-1022.24~22.04.1
linux-gcp-fips	—	5.15.0-1059.67+fips1
linux-gke	—	5.15.0-1058.63
linux-gke-4.15	—	—
linux-gke-5.15	—	—
linux-gke-5.4	—	—
linux-gkeop	—	5.15.0-1044.51
linux-gkeop-5.15	—	5.15.0-1044.51~20.04.1
linux-gkeop-5.4	—	—
linux-hwe	—	—
linux-hwe-5.11	—	—
linux-hwe-5.13	—	—
linux-hwe-5.15	—	5.15.0-106.116~20.04.1
linux-hwe-5.19	—	—
linux-hwe-5.4	—	5.4.0-181.201~18.04.1
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	—	5.15.0-1054.57
linux-ibm-5.15	—	5.15.0-1054.57~20.04.1
linux-ibm-5.4	—	5.4.0-1071.76~18.04.1
linux-intel-5.13	—	—
linux-intel-iot-realtime	—	5.15.0-1054.56
linux-intel-iotg	—	5.15.0-1057.63
linux-intel-iotg-5.15	—	5.15.0-1058.64~20.04.1
linux-iot	—	5.4.0-1036.37
linux-kvm	—	5.15.0-1058.63
linux-lowlatency	—	5.15.0-106.116
linux-lowlatency-hwe-5.15	—	5.15.0-106.116~20.04.1
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	—	—
linux-nvidia	—	5.15.0-1054.55
linux-nvidia-6.2	—	—
linux-nvidia-6.5	—	6.5.0-1021.22
linux-nvidia-tegra	—	5.15.0-1026.26
linux-nvidia-tegra-5.15	—	5.15.0-1027.27~20.04.1
linux-nvidia-tegra-igx	—	5.15.0-1015.15
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	—	—
linux-oem-6.5	—	6.5.0-1024.25
linux-oracle	—	5.15.0-1059.65
linux-oracle-5.0	—	—
linux-oracle-5.11	—	—
linux-oracle-5.13	—	—
linux-oracle-5.15	—	5.15.0-1059.65~20.04.1
linux-oracle-5.3	—	—
linux-oracle-5.4	—	5.4.0-1123.132~18.04.1
linux-oracle-5.8	—	—
linux-oracle-6.5	—	6.5.0-1024.24~22.04.1
linux-raspi	—	5.15.0-1054.57
linux-raspi-5.4	—	5.4.0-1108.120~18.04.1
linux-raspi-realtime	—	6.8.0-2001.1
linux-raspi2	—	—
linux-realtime	—	5.15.0-1062.70
linux-riscv	—	—
linux-riscv-5.11	—	—
linux-riscv-5.15	—	5.15.0-1057.61~20.04.1
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-2023-52622

REPORT https://git.kernel.org/linus/5d1935ac02ca5aee364a449a35e2977ea84509b0

REPORT https://git.kernel.org/stable/c/cd1f93ca97a9136989f3bd2bf90696732a2ed644

REPORT https://git.kernel.org/stable/c/b183fe8702e78bba3dcef8e7193cab6898abee07

REPORT https://git.kernel.org/stable/c/cfbbb3199e71b63fc26cee0ebff327c47128a1e8

REPORT https://git.kernel.org/stable/c/d76c8d7ffe163c6bf2f1ef680b0539c2b3902b90

REPORT https://git.kernel.org/stable/c/6d2cbf517dcabc093159cf138ad5712c9c7fa954

REPORT https://git.kernel.org/stable/c/8b1413dbfe49646eda2c00c0f1144ee9d3368e0c

REPORT https://git.kernel.org/stable/c/dc3e0f55bec4410f3d74352c4a7c79f518088ee2

REPORT https://git.kernel.org/stable/c/5d1935ac02ca5aee364a449a35e2977ea84509b0

REPORT https://www.cve.org/CVERecord?id=CVE-2023-52622

ADVISORY https://ubuntu.com/security/notices/USN-6766-1

ADVISORY https://ubuntu.com/security/notices/USN-6767-1

ADVISORY https://ubuntu.com/security/notices/USN-6767-2

ADVISORY https://ubuntu.com/security/notices/USN-6766-2

ADVISORY https://ubuntu.com/security/notices/USN-6766-3

ADVISORY https://ubuntu.com/security/notices/USN-6795-1

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-6828-1

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

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🛡️ CVE-2023-52622 on Ubuntu — linux

Description

Distribution advisory

How this vulnerability can be exploited

CVSS metrics in full

Weakness class

Affected software

Timeline and source

References

Other advisories for this package

Same weakness in other software

CVE-2023-52622 on other distributions

Track new vulnerabilities in linux

Browse related advisories

Company

Resources

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