Security readout for executives and security teams
Plain-English summary
A Linux kernel memory-mapping error can trigger a warning and an interruptible system hang during certain file writes. The documented failure requires a specialized 32-bit x86, high-memory debug configuration and huge-page-backed tmpfs, so typical modern systems may have limited exposure. The supplied CVSS rating is 7.8, but the sources do not document real-world attacks.
Executive priority
Treat as high priority where the documented configuration exists because a local user may cause serious system impact. Use configuration-based triage rather than an indiscriminate emergency rollout. Systems without the specialized conditions appear less likely to encounter the documented failure, although complete affected-version boundaries should be confirmed with vendors.
Technical view
The flaw affects copy_page_from_iter_atomic() when CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP is enabled. Under the documented x86_32 highmem and huge=always tmpfs conditions, incorrect local mapping handling reaches kunmap_local_indexed(), emits a warning, and hangs. The referenced stable-kernel changes limit the operation in this configuration. The bundle does not clearly establish every vulnerable-to-fixed version boundary.
Likely exposure
Prioritize 32-bit x86 Linux systems using high memory, CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP, and huge-page-backed tmpfs. The bundle identifies Linux 6.6, 6.6.60, 6.11.7, and 6.12 as affected entries, but its version data is insufficient to infer complete distribution-specific exposure.
Exploitation context
The documented trigger is a local file-write workload under an unusual kernel configuration. The CVSS vector requires local access with low privileges and no user interaction. CISA KEV status is false, and the supplied sources provide no evidence of active exploitation or a publicly weaponized exploit.
Researcher notes
The source describes a warning at kunmap_local_indexed() followed by an interruptible hang during generic_perform_write() and shmem_file_write_iter(). It does not explain how the CVSS confidentiality and integrity impacts arise, provide a CWE, or document exploitation. Researchers should distinguish the demonstrated availability failure from broader impacts asserted only by the CVSS vector.
Mitigation direction
- Identify systems running the listed Linux kernel versions and prioritize matching 32-bit high-memory configurations.
- Obtain the appropriate fixed kernel package from the Linux distribution or system vendor.
- Confirm the selected update incorporates the applicable referenced stable-kernel fix.
- If updating is delayed, consult vendor guidance; the supplied sources name no temporary mitigation.
- Reboot into the updated kernel according to normal change-control procedures.
Validation and detection
- Record the running kernel version and architecture on potentially exposed systems.
- Check whether CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP and high-memory support are enabled.
- Determine whether affected systems use huge-page-backed tmpfs workloads.
- Verify the installed kernel contains the applicable referenced stable fix.
- After updating, confirm systems are running the intended kernel and monitor for related highmem warnings or hangs.
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
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CVE-2024-50222 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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:H1.85.9CISA-ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9LinuxVulnerability 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
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/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/4f7ffa83fa79dd52efbaef366c850aaaae06a469CVE reference, Linux
- https://git.kernel.org/stable/c/3a303409f271dfe0987b8f79595138340497a32dCVE reference, Linux
- https://git.kernel.org/stable/c/c749d9b7ebbc5716af7a95f7768634b30d9446ecCVE reference, Linux
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.