🛡️ CVE-2023-52451 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: powerpc/pseries/memhp: Fix access beyond end of drmem array dlpar_memory_remove_by_index() may access beyond the bounds of the drmem lmb array when the LMB lookup fails to match an entry with the given DRC index. When the search fails, the cursor is left pointing to &drmem_info->lmbs[drmem_info->n_lmbs], which is one element past the last valid entry in the array. The debug message at the end of the function then dereferences this pointer: pr_debug("Failed to hot-remove memory at %llx\n", lmb->base_addr); This was found by inspection and confirmed with KASAN: pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 1234 ================================================================== BUG: KASAN: slab-out-of-bounds in dlpar_memory+0x298/0x1658 Read of size 8 at addr c000000364e97fd0 by task bash/949 dump_stack_lvl+0xa4/0xfc (unreliable) print_report+0x214/0x63c kasan_report+0x140/0x2e0 __asan_load8+0xa8/0xe0 dlpar_memory+0x298/0x1658 handle_dlpar_errorlog+0x130/0x1d0 dlpar_store+0x18c/0x3e0 kobj_attr_store+0x68/0xa0 sysfs_kf_write+0xc4/0x110 kernfs_fop_write_iter+0x26c/0x390 vfs_write+0x2d4/0x4e0 ksys_write+0xac/0x1a0 system_call_exception+0x268/0x530 system_call_vectored_common+0x15c/0x2ec Allocated by task 1: kasan_save_stack+0x48/0x80 kasan_set_track+0x34/0x50 kasan_save_alloc_info+0x34/0x50 __kasan_kmalloc+0xd0/0x120 __kmalloc+0x8c/0x320 kmalloc_array.constprop.0+0x48/0x5c drmem_init+0x2a0/0x41c do_one_initcall+0xe0/0x5c0 kernel_init_freeable+0x4ec/0x5a0 kernel_init+0x30/0x1e0 ret_from_kernel_user_thread+0x14/0x1c The buggy address belongs to the object at c000000364e80000 which belongs to the cache kmalloc-128k of size 131072 The buggy address is located 0 bytes to the right of allocated 98256-byte region [c000000364e80000, c000000364e97fd0) ================================================================== pseries-hotplug-mem: Failed to hot-remove memory at 0 Log failed lookups with a separate message and dereference the cursor only when it points to a valid entry.

Distribution advisory

This page covers CVE-2023-52451 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 high, integrity high, 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:H/I:H/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: High — total loss, or loss the attacker controls.
Integrity impact: High — total loss, or loss the attacker controls.
Availability impact: High — total loss, or loss the attacker controls.

Affected software

UBUNTU-CVE-2023-52451 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 4.15.0-1167.180~16.04.1)
linux-azure (fixed in 5.15.0-1060.69)
linux-azure-4.15 (fixed in 4.15.0-1176.191)
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 4.15.0-1161.178)
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 4.4.0-253.287~14.04.1)
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 17 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-4fpx-x3w2-4hfv (published 7 Jan 2026)
CGA-fv2v-4h6c-q367 (published 7 Jan 2026)

CVE-2023-52451 on other distributions

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

BellSoft — BELL-CVE-2023-52451 Base record — CVE-2023-52451 Debian — DEBIAN-CVE-2023-52451

Details

Severity Unknown

CVSS Score N/A

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

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2024-02-22

Updated 2026-08-20

Modified 2026-08-17

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	—	4.15.0-1167.180~16.04.1
linux-azure	—	5.15.0-1060.69
linux-azure-4.15	—	4.15.0-1176.191
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	—	4.15.0-1161.178
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	—	4.4.0-253.287~14.04.1
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-2023-52451

REPORT https://git.kernel.org/stable/c/bb79613a9a704469ddb8d6c6029d532a5cea384c

REPORT https://git.kernel.org/stable/c/9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7

REPORT https://git.kernel.org/stable/c/b582aa1f66411d4adcc1aa55b8c575683fb4687e

REPORT https://git.kernel.org/stable/c/999a27b3ce9a69d54ccd5db000ec3a447bc43e6d

REPORT https://git.kernel.org/stable/c/026fd977dc50ff4a5e09bfb0603557f104d3f3a0

REPORT https://git.kernel.org/stable/c/df16afba2378d985359812c865a15c05c70a967e

REPORT https://git.kernel.org/stable/c/708a4b59baad96c4718dc0bd3a3427d3ab22fedc

REPORT https://git.kernel.org/stable/c/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5

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-2023-52451

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-6739-1

ADVISORY https://ubuntu.com/security/notices/USN-6740-1

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-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-2023-52451 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-2023-52451 on other distributions

Is linux part of your stack?

Browse related advisories

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