Security readout for executives and security teams
Plain-English summary
CVE-2023-52451 is a Linux kernel bug in PowerPC pseries memory hot-remove handling. A failed memory block lookup can make the kernel read just past an internal array while logging a debug message. The evidence points to a platform-specific kernel issue, not a broad internet-facing service flaw.
Executive priority
Treat this as a targeted infrastructure maintenance issue. It deserves patch tracking for affected PowerPC pseries estates, but current sources do not support emergency prioritization for typical x86 Linux servers or internet-facing applications.
Technical view
In dlpar_memory_remove_by_index(), a failed DRC index search leaves the cursor at drmem_info->lmbs[n_lmbs]. The function then dereferences lmb->base_addr for pr_debug, causing a slab out-of-bounds read confirmed by KASAN. Kernel stable commits change failed lookup logging to avoid dereferencing an invalid cursor.
Likely exposure
Exposure appears limited to Linux on PowerPC pseries systems using DLPAR memory hotplug. The call trace shows a sysfs write path, but the source bundle does not state required privileges, default reachability, or whether debugging must be enabled for impact.
Exploitation context
The source bundle says the bug was found by inspection and confirmed with KASAN. It does not cite public exploitation, and KEV is false. No exploit path, weaponized proof, or remotely reachable scenario is provided.
Researcher notes
The incomplete pieces are impact severity, access requirements, and practical exploitability. The strongest evidence is the KASAN out-of-bounds read on a failed DRC index lookup and the upstream stable fixes. Avoid broad claims beyond pseries memory hotplug exposure.
Mitigation direction
- Apply the relevant Linux stable kernel fix for your maintained branch.
- Prioritize affected PowerPC pseries hosts that use memory hotplug operations.
- Check Debian LTS or vendor kernel advisories for packaged fixed versions.
- If patching is delayed, review vendor guidance for operational workarounds.
Validation and detection
- Inventory Linux PowerPC pseries systems and kernel versions.
- Confirm whether pseries DLPAR memory hotplug is used or exposed operationally.
- Verify the kernel includes one of the referenced stable commits.
- Review kernel or distribution advisory status for CVE-2023-52451.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit bb79613a9a704469ddb8d6c6029d532a5cea384c
- Linux stable commit 9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7
- Linux stable commit b582aa1f66411d4adcc1aa55b8c575683fb4687e
- Linux stable commit 999a27b3ce9a69d54ccd5db000ec3a447bc43e6d
- Linux stable commit 026fd977dc50ff4a5e09bfb0603557f104d3f3a0
- Linux stable commit df16afba2378d985359812c865a15c05c70a967e
- Linux stable commit 708a4b59baad96c4718dc0bd3a3427d3ab22fedc
- Linux stable commit bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5
- Debian LTS announcement
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2023-52451 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/bb79613a9a704469ddb8d6c6029d532a5cea384cCVE reference
- https://git.kernel.org/stable/c/9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7CVE reference
- https://git.kernel.org/stable/c/b582aa1f66411d4adcc1aa55b8c575683fb4687eCVE reference
- https://git.kernel.org/stable/c/999a27b3ce9a69d54ccd5db000ec3a447bc43e6dCVE reference
- https://git.kernel.org/stable/c/026fd977dc50ff4a5e09bfb0603557f104d3f3a0CVE reference
- https://git.kernel.org/stable/c/df16afba2378d985359812c865a15c05c70a967eCVE reference
- https://git.kernel.org/stable/c/708a4b59baad96c4718dc0bd3a3427d3ab22fedcCVE reference
- https://git.kernel.org/stable/c/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5CVE reference
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.htmlCVE reference · x_transferred
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.