Security readout for executives and security teams
Plain-English summary
CVE-2024-27436 is a Linux kernel flaw in USB audio handling. A malformed USB audio channel map can cause an out-of-bounds write in kernel memory. The published impact is limited availability loss, not data theft or privilege escalation. Treat it as a patching priority for Linux systems and appliances that may process USB audio devices.
Executive priority
Prioritize through normal kernel patch cycles, with faster action for exposed appliances, kiosks, workstations, or embedded systems that accept peripheral devices. Current sources support moderate urgency, not emergency response.
Technical view
The ALSA usb-audio driver could continue parsing channel bits after all expected channels were found. If a USB audio device set more channel bits than its declared channel count, the driver could write outside the map array. The issue is classified as CWE-787 and fixed across multiple Linux stable branches.
Likely exposure
Exposure is most likely on Linux systems, embedded products, or appliances running affected kernel versions with USB audio support. The bundle lists Linux kernel version boundaries and stable fixes, plus Debian LTS and Siemens advisories. Product-specific exposure requires checking each vendor kernel package or advisory.
Exploitation context
The source bundle does not cite active exploitation, and KEV is false. The CVSS vector reports remote, unauthenticated, low-complexity availability impact, but the description centers on USB audio device parsing. Evidence is insufficient to claim public exploitation or practical weaponization.
Researcher notes
Focus review on ALSA usb-audio channel map parsing and vendor backports. The public record names an out-of-bounds write but does not provide exploit evidence. Be careful interpreting the CVSS network vector because the vulnerability description specifically involves USB audio device behavior.
Mitigation direction
- Update to a vendor kernel containing the referenced Linux stable fixes.
- Review Debian LTS and relevant vendor advisories for packaged kernel updates.
- Inventory Linux systems and appliances that expose or use USB audio functionality.
- If no update is available, follow vendor guidance and reduce exposure to untrusted USB audio devices.
- Track appliance vendor advisories, including Siemens where applicable.
Validation and detection
- Record running kernel versions across servers, endpoints, and embedded assets.
- Compare kernel packages against vendor advisories for CVE-2024-27436.
- Confirm fixed package versions or stable commit backports in changelogs.
- Test patched kernels in staging before production rollout.
- Verify appliance firmware advisories for bundled Linux kernel fixes.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-27436 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
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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/7e2c1b0f6dd9abde9e60f0f9730026714468770fCVE reference, Linux
- https://git.kernel.org/stable/c/6d5dc96b154be371df0d62ecb07efe400701ed8aCVE reference, Linux
- https://git.kernel.org/stable/c/5cd466673b34bac369334f66cbe14bb77b7d7827CVE reference, Linux
- https://git.kernel.org/stable/c/9af1658ba293458ca6a13f70637b9654fa4be064CVE reference, Linux
- https://git.kernel.org/stable/c/629af0d5fe94a35f498ba2c3f19bd78bfa591be6CVE reference, Linux
- https://git.kernel.org/stable/c/22cad1b841a63635a38273b799b4791f202ade72CVE reference, Linux
- https://git.kernel.org/stable/c/c8a24fd281dcdf3c926413dafbafcf35cde517a9CVE reference, Linux
- https://git.kernel.org/stable/c/6d88b289fb0a8d055cb79d1c46a56aba7809d96dCVE reference, Linux
- https://git.kernel.org/stable/c/a39d51ff1f52cd0b6fe7d379ac93bd8b4237d1b7CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlCVE reference, CVE · x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlCVE reference, siemens-SADP
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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.