Security readout for executives and security teams
Plain-English summary
A flaw in Linux’s IBM Z DASD storage handling can incorrectly interpret an indirect data pointer and panic the kernel during error processing. A successful trigger could disrupt the affected system. The supplied CVSS assessment also indicates possible confidentiality and integrity impact, but the description specifically documents a kernel panic rather than demonstrated data compromise.
Executive priority
Treat this as a high-priority availability risk for affected IBM Z Linux infrastructure, especially business-critical systems with DASD storage. It is not presented as an internet-reachable vulnerability, and active exploitation is not established. Patch promptly through normal kernel maintenance, accelerating remediation where local access is broadly available or outages would have material impact.
Technical view
In dasd_eckd_dump_sense(), an indirect-addressed DASD CCW contains a physical pointer to an IDAL, not the data address itself. The vulnerable code dereferences it without the required physical-to-virtual translation. The same pattern was corrected for dasd_page_cache. The documented failure occurs in error paths and causes a kernel panic.
Likely exposure
Exposure appears limited to Linux on s390 systems using the affected DASD ECKD and indirect CCW addressing paths. The supplied affected data identifies Linux 6.9 through 6.9.9 and 6.10, but does not clarify distribution backports, configuration prerequisites, or whether every listed build contains the vulnerable path.
Exploitation context
The CVSS vector describes a local, low-complexity attack requiring low privileges and no user interaction. The supplied record is not in KEV and provides no evidence of active exploitation or a public exploit. Because the documented path is associated with DASD error handling, practical reachability may depend on hardware, configuration, and error conditions not fully described here.
Researcher notes
The primary documented impact is invalid pointer dereferencing and kernel panic. Although CVSS assigns high confidentiality, integrity, and availability impacts, the supplied narrative does not demonstrate information disclosure or modification. Researchers should focus on affected-version provenance, DASD configuration, error-path reachability, and confirmation that vendor kernels include either referenced stable commit.
Mitigation direction
- Upgrade to a vendor-supported kernel containing the referenced DASD fixes.
- Check distribution advisories and kernel changelogs for backported fixes.
- Prioritize affected IBM Z systems that use DASD ECKD storage.
- Limit untrusted local access until affected systems are remediated.
Validation and detection
- Inventory s390 Linux hosts and record their exact kernel versions.
- Determine whether hosts use DASD ECKD and indirect CCW addressing.
- Verify the referenced fix commits or vendor backports are present.
- Review kernel logs for DASD errors, oops messages, or unexpected panics.
- Confirm updated systems boot and storage error handling remains stable.
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
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ATT&CK lookup starting points
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CVE-2024-42099 mapping review
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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
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SSVC decision data
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
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ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/c116475f7d6410b1e6d399207ac75de6cf9c3652CVE reference, Linux
- https://git.kernel.org/stable/c/b3a58f3b90f564f42a5c35778d8c5107b2c2150bCVE reference, Linux
Products and packages named in the record
CWE details
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