Security readout for executives and security teams
Plain-English summary
CVE-2023-52599 is a Linux kernel flaw in the JFS filesystem code. A bad allocation-group calculation can cause an out-of-bounds array access during directory creation. Business urgency depends on whether systems use or allow mounting JFS filesystems. No source provided evidence of active exploitation.
Executive priority
Prioritize routine kernel patching, with faster action for systems that use JFS or process untrusted filesystem images. This is not currently supported as an internet-scale emergency by the provided sources.
Technical view
The issue is in fs/jfs/jfs_imap.c diNewExt. When agstart is too large, agno can overflow; the fix rejects invalid agno values before continuing. The report came from syzkaller/UBSAN on a 6.7.0-rc4 kernel path involving jfs_mkdir. Multiple Linux stable commits and Debian LTS advisories reference fixes.
Likely exposure
Linux systems with JFS enabled or mounted are the relevant exposure. Risk is higher where users, containers, removable media, or automation can introduce or operate on JFS filesystems. Systems not using JFS are less likely to be exposed, but kernel configuration and module availability should be verified.
Exploitation context
The public record shows a crash-detection report and kernel fix, not a weaponized exploit. Trigger context shown is filesystem operations on JFS, specifically directory creation. KEV is false in the provided data, so active exploitation should not be assumed.
Researcher notes
Affected-version data is broad and commit-based, and severity/CVSS are not provided. Treat distribution backports as authoritative. The fix changes bounds validation from allowing invalid agno handling to exiting when agno is invalid, including the >= MAXAG correction noted in the record.
Mitigation direction
- Update Linux kernels using vendor packages or stable releases containing the referenced JFS fix.
- Apply Debian LTS kernel updates where Debian advisories apply.
- If patching is delayed, restrict mounting or use of untrusted JFS filesystems.
- Review vendor kernel advisories for backported fixes and affected package versions.
Validation and detection
- Inventory Linux hosts and identify kernels within the listed affected version ranges.
- Check whether JFS is enabled, loadable, or mounted on production systems.
- Confirm installed vendor kernel includes a fix for CVE-2023-52599 or referenced stable commits.
- Review logs for kernel UBSAN, JFS, or filesystem crash messages where applicable.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit f423528
- Linux stable commit de6a91a
- Linux stable commit e2b77d1
- Linux stable commit 6aa3002
- Linux stable commit 3537f92
- Linux stable commit 6996d43
- Linux stable commit 5a66601
- Linux stable commit 49f9637
- Debian LTS advisory June 2024 00017
- Debian LTS advisory June 2024 00020
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-2023-52599 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.
SSVC decision data
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/f423528488e4f9606cef858eceea210bf1163f41CVE reference, Linux
- https://git.kernel.org/stable/c/de6a91aed1e0b1a23e9c11e7d7557f088eeeb017CVE reference, Linux
- https://git.kernel.org/stable/c/e2b77d107b33bb31c8b1f5c4cb8f277b23728f1eCVE reference, Linux
- https://git.kernel.org/stable/c/6aa30020879042d46df9f747e4f0a486eea6fe98CVE reference, Linux
- https://git.kernel.org/stable/c/3537f92cd22c672db97fae6997481e678ad14641CVE reference, Linux
- https://git.kernel.org/stable/c/6996d43b14486f4a6655b10edc541ada1b580b4bCVE reference, Linux
- https://git.kernel.org/stable/c/5a6660139195f5e2fbbda459eeecb8788f3885feCVE reference, Linux
- https://git.kernel.org/stable/c/49f9637aafa6e63ba686c13cb8549bf5e6920402CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlCVE reference, CVE · 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.