Security readout for executives and security teams
Plain-English summary
A race condition in the Linux ALSA Line6 MIDI driver can occur when two kernel paths access the same buffer concurrently. The supplied CVSS assessment rates potential confidentiality, integrity, and availability impact as high, but the public evidence describes a syzkaller-triggered KMSAN warning rather than a demonstrated real-world compromise.
Executive priority
Prioritize remediation on multi-user systems permitting untrusted local access and systems using Line6 MIDI functionality. Treat this as an accelerated kernel-maintenance issue, not an internet-wide emergency: severity is high, but the stated vector is local and the supplied sources provide no evidence of active exploitation.
Technical view
The URB completion callback and rawmidi API can concurrently access the Line6 midibuf without adequate synchronization. The kernel fix adds spinlock protection around the callback-side midibuf operation. CVSS 3.1 scores this 7.8, requiring local access and low privileges, with no user interaction.
Likely exposure
Exposure is most plausible on affected Linux kernels where the ALSA Line6 driver and raw MIDI path can be exercised. Internet reachability alone does not create the stated attack path. Distribution backports may alter exposure, so kernel version strings alone are insufficient. The supplied affected-version data should be validated against vendor package advisories.
Exploitation context
The supplied record is not in CISA KEV, and no cited source establishes active exploitation or a public working exploit. Discovery evidence is limited to a KMSAN warning triggered by syzkaller. The CVSS vector models a local, low-privileged attack with low complexity, but practical exploitation has not been demonstrated by these sources.
Researcher notes
The evidence establishes a synchronization defect and a spinlock-based fix, but not a reliable exploitation primitive. Researchers should distinguish sanitizer detection from demonstrated impact. The affected data mixes release versions with commit-like entries and default statuses; confirm branch ancestry and distribution backports before declaring a host vulnerable.
Mitigation direction
- Update to a vendor-supported kernel containing the applicable stable fix or distribution backport.
- Review the cited stable commits and distribution notices when mapping fixes across maintained kernel branches.
- Follow the Linux distribution vendor's guidance if package-level backport status remains unclear.
Validation and detection
- Inventory deployed kernel package versions and currently running kernel builds.
- Identify systems where the ALSA Line6 driver is installed, available, or loaded.
- Confirm package advisories or changelogs reference CVE-2024-44954 or an applicable stable commit.
- After updating, verify each system booted into the replacement kernel.
- Re-scan affected assets and document systems awaiting a confirmed vendor fix.
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-2024-44954 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
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: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/643293b68fbb6c03f5e907736498da17d43f0d81CVE reference, Linux
- https://git.kernel.org/stable/c/40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5CVE reference, Linux
- https://git.kernel.org/stable/c/e7e7d2b180d8f297cea6db43ea72402fd33e1a29CVE reference, Linux
- https://git.kernel.org/stable/c/a54da4b787dcac60b598da69c9c0072812b8282dCVE reference, Linux
- https://git.kernel.org/stable/c/c80f454a805443c274394b1db0d1ebf477abd94eCVE reference, Linux
- https://git.kernel.org/stable/c/535df7f896a568a8a1564114eaea49d002cb1747CVE reference, Linux
- https://git.kernel.org/stable/c/51d87f11dd199bbc6a85982b088ff27bde53b48aCVE reference, Linux
- https://git.kernel.org/stable/c/15b7a03205b31bc5623378c190d22b7ff60026f1CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.htmlCVE reference, CVE
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.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.