Security readout for executives and security teams
Plain-English summary
A flaw in the Linux kernel’s JFS filesystem can cause unsafe processing when an internal allocation value becomes negative. The supplied CVSS assessment indicates a local, low-privileged attack path with potentially serious confidentiality, integrity, and availability consequences. Systems not using JFS are less likely to expose the vulnerable code path.
Executive priority
Treat this as a high-priority kernel maintenance issue on JFS-using, multi-user, or otherwise locally exposed systems. Expedite patching there. For systems demonstrably lacking JFS exposure, retain normal kernel patch cadence while documenting the reduced applicability.
Technical view
CVE-2024-56597 is a shift-out-of-bounds condition in JFS dbSplit processing. A negative dmt_budmin value can cause errors during later allocation stages. Stable-kernel fixes add an early validation check in dbAllocCtl and return an error before the unsafe processing occurs.
Likely exposure
Exposure is most plausible on affected Linux kernels where JFS is enabled and its allocation code is exercised. The supplied data lists affected releases through several stable branches, but version mapping is ambiguous. Confirm distribution-specific status rather than relying only on upstream version numbers.
Exploitation context
The CVSS 3.1 vector scores this 7.8: local access, low complexity, low privileges, and no user interaction. The bundle does not identify public exploitation, and the CVE is not marked as CISA KEV. Practical exploitability and prerequisites are not established by the provided sources.
Researcher notes
The fix validates dmt_budmin earlier in dbAllocCtl, preventing downstream shift-out-of-bounds behavior in dbSplit. The bundle provides multiple stable-branch commits but no reproduction details, affected configuration requirements, public exploit evidence, or demonstrated impact. Distribution backports may make raw kernel-version comparisons unreliable.
Mitigation direction
- Install the distribution-provided kernel update containing the upstream JFS fix.
- Consult vendor guidance to map patched package versions to each deployed kernel.
- Prioritize systems actively using JFS or permitting untrusted local access.
- Where operationally safe, restrict unnecessary JFS use until updates are deployed.
Validation and detection
- Inventory running kernel versions across Linux hosts.
- Identify systems with JFS enabled, loaded, mounted, or otherwise operationally required.
- Compare installed packages against distribution security advisories and fixed versions.
- Verify updated systems booted into the patched kernel, not merely installed it.
- Monitor kernel and filesystem logs for JFS allocation errors or crashes.
Public sources used
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-2024-56597 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
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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/bbb24ce7f06ef9b7c05beb9340787cbe9fd3d08eCVE reference, Linux
- https://git.kernel.org/stable/c/df7c76636952670b31bd6c12b3aed3c502122273CVE reference, Linux
- https://git.kernel.org/stable/c/6676034aa753aa448beb30dbd75630927ba7cd96CVE reference, Linux
- https://git.kernel.org/stable/c/51a203470f502a64a3da8dcea51c4748e8267a6cCVE reference, Linux
- https://git.kernel.org/stable/c/c56245baf3fd1f79145dd7408e3ead034b74255cCVE reference, Linux
- https://git.kernel.org/stable/c/52756a57e978e2706543a254f88f266cc6702f36CVE reference, Linux
- https://git.kernel.org/stable/c/a5f5e4698f8abbb25fe4959814093fb5bfa1aa9dCVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.htmlCVE reference, CVE
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.htmlCVE reference, CVE
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.