Security readout for executives and security teams
Plain-English summary
CVE-2022-49376 is a Linux kernel flaw that can crash affected systems during a specific SCSI disk probing error path. It does not expose data or allow modification, but it can affect availability. The source bundle rates it medium with local, low-privilege attack conditions.
Executive priority
Treat this as a routine but real availability risk. It is not supported as remotely exploitable or actively exploited in the supplied evidence, but shared Linux systems should receive timely kernel maintenance because local crashes can disrupt business services.
Technical view
The issue is a NULL pointer dereference in the Linux SCSI disk driver. If sd_probe() hits an early error before sdkp->device is initialized, sd_zbc_release_disk() may call sd_is_zoned() on invalid state. The fix removes that cleanup call from the early error path.
Likely exposure
Exposure is limited to systems running affected Linux kernel versions or unpatched vendor backports containing this SCSI disk driver behavior. The bundle does not identify affected distributions, appliances, cloud images, or hardware models.
Exploitation context
The CVSS vector requires local access with low privileges and no user interaction. KEV is false, and the provided sources do not show active exploitation. Impact is availability only, consistent with a potential kernel crash or denial of service.
Researcher notes
The patch rationale says zone information is only allocated after sd_revalidate_disk(), when cleanup is handled through sd_disk_release(). Focus validation on whether downstream kernels include the equivalent SCSI sd_probe() error-path fix, not only upstream version strings.
Mitigation direction
- Update to a vendor kernel package containing the referenced stable fixes.
- Check Linux distribution advisories for backported fixes for CVE-2022-49376.
- Prioritize patching shared hosts where untrusted local users have access.
- Restrict local account access to trusted users until patched.
Validation and detection
- Inventory Linux kernel versions across servers, workstations, and appliances.
- Compare installed kernels with vendor advisories for CVE-2022-49376.
- Confirm the kernel includes one of the referenced stable fixes or a vendor backport.
- Review asset classes using SCSI or virtual disk stacks for prioritization.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit c1f0187025905e9981000d44a92e159468b561a8
- Linux stable commit 0fcb0b131cc90c8f523a293d84c58d0c7273c96f
- Linux stable commit 78f8e96df06e2d04d82d4071c299b59d28744f47
- Linux stable commit 3733439593ad12f7b54ae35c273ea6f15d692de3
- Linux stable commit 05fbde3a77a4f1d62e4c4428f384288c1f1a0be5
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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CWE-476: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-49376 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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/c1f0187025905e9981000d44a92e159468b561a8CVE reference, Linux
- https://git.kernel.org/stable/c/0fcb0b131cc90c8f523a293d84c58d0c7273c96fCVE reference, Linux
- https://git.kernel.org/stable/c/78f8e96df06e2d04d82d4071c299b59d28744f47CVE reference, Linux
- https://git.kernel.org/stable/c/3733439593ad12f7b54ae35c273ea6f15d692de3CVE reference, Linux
- https://git.kernel.org/stable/c/05fbde3a77a4f1d62e4c4428f384288c1f1a0be5CVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.