Security readout for executives and security teams
Plain-English summary
A Linux kernel memory-management regression can mishandle protected KFENCE objects during bulk freeing, corrupt slab padding, and crash the kernel. A successful trigger could disrupt affected systems. The supplied record rates it CVSS 8.1, although the documented evidence demonstrates a crash rather than confirmed data theft or code execution.
Executive priority
Prioritize remediation as high for affected, business-critical Linux systems because a kernel crash can cause service interruption. Urgency may be lower where the vendor confirms the kernel is unaffected or the vulnerable configuration and path are unreachable. There is no supplied evidence of active exploitation.
Technical view
Commit 782f8906f805 moved KFENCE object handling outside do_slab_free but missed __kmem_cache_free_bulk. Consequently, a KFENCE object may reach the normal SLUB free path, producing slab corruption checks and a kernel crash. The correction adds a kfence_free check to that bulk-free path.
Likely exposure
Exposure is limited to affected Linux kernel builds, especially configurations using KFENCE and workloads reaching the vulnerable bulk slab-free path. The supplied version data identifies Linux 6.8, 6.10.5, and 6.11, but does not clearly define complete distribution-specific ranges. Confirm status with the operating-system vendor.
Exploitation context
The supplied bundle says this CVE is not in KEV and provides no evidence of active exploitation or a public exploit. Network reachability is suggested by the CVSS vector, but the cited technical description does not establish a specific remote trigger. Treat remote exploitability and confidentiality or integrity impact as unconfirmed.
Researcher notes
The strongest source-grounded impact is slab corruption detection followed by a crash. Although CVSS assigns high confidentiality, integrity, and availability impacts, the supplied narrative does not demonstrate disclosure, privilege escalation, or arbitrary execution. Distribution backports may make version-only assessment unreliable; inspect vendor package status or the cited fix.
Mitigation direction
- Apply a vendor-supported kernel update containing the upstream correction, following normal maintenance and reboot procedures.
- Check distribution guidance for exact affected and fixed package versions before scheduling remediation.
- If an update is unavailable, request a vendor-supported mitigation rather than assuming disabling KFENCE is appropriate.
- Prioritize exposed or availability-critical Linux systems where an unexpected kernel crash would materially affect operations.
Validation and detection
- Inventory running kernel versions and configurations across Linux systems.
- Confirm each distribution vendor marks the installed kernel package as fixed for CVE-2024-44973.
- Verify updated systems booted into the corrected kernel rather than retaining the previous running version.
- Review kernel logs for slab padding-overwrite reports, SLUB errors, or related crashes.
- For custom kernels, confirm the cited KFENCE bulk-free correction is present in the source tree.
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-2024-44973 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/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
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:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9LinuxVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/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/b35cd7f1e969aaa63e6716d82480f6b8a3230949CVE reference, Linux
- https://git.kernel.org/stable/c/a371d558e6f3aed977a8a7346350557de5d25190CVE 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.