Security readout for executives and security teams
Plain-English summary
A Linux XDP networking flaw can expose uninitialized kernel memory to an XDP program running through a CPU map. The program may receive unpredictable data instead of a valid receive-queue index. The supplied record rates it high severity, but exploitation requires local privileges and the specific XDP cpumap configuration.
Executive priority
Prioritize remediation for network-facing infrastructure and appliances that actively use XDP cpumap processing. Treat general Linux fleets as an inventory-and-triage task rather than assuming universal exposure. Accelerate patching where untrusted or lower-privileged users can interact with relevant XDP functionality.
Technical view
The kernel failed to initialize xdp_rxq_info before invoking an XDP program attached to a cpumap entry. Consequently, xdp_md->rx_queue_index could contain residual memory data. This is classified as CWE-908. The kernel fix zero-initializes the receive-queue structure before program execution.
Likely exposure
Exposure is most likely on affected Linux kernels that run XDP programs attached to cpumap entries. Systems without that configuration are less likely to reach the vulnerable path. The supplied version data spans Linux 5.9 through 6.8 but is ambiguous; confirm exact package status with the distribution or equipment vendor.
Exploitation context
The supplied CVSS vector describes a local, low-complexity attack requiring low privileges and no user interaction. CISA KEV status is false, and the provided sources do not establish active exploitation or a public weaponized exploit. Practical impact depends on an attacker reaching the affected XDP cpumap execution path.
Researcher notes
The observable defect is unintended disclosure of uninitialized data through rx_queue_index. Although the supplied CVSS assigns high confidentiality, integrity, and availability impacts, the description directly substantiates memory disclosure and unpredictable metadata only. The bundle does not explain a demonstrated path to broader compromise, so those consequences should not be assumed.
Mitigation direction
- Install a vendor-supported kernel containing the referenced zero-initialization fix.
- Check distribution and appliance advisories for the exact corrected package version.
- Prioritize systems using XDP programs attached to cpumap entries.
- Where updating is delayed, assess whether the affected XDP cpumap configuration can be safely disabled.
Validation and detection
- Inventory active kernel versions across Linux hosts, appliances, and embedded systems.
- Identify systems running XDP programs attached to cpumap entries.
- Compare installed packages with applicable vendor advisories and referenced stable commits.
- After updating, verify the corrected kernel is active following any required reboot.
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-908: 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-2024-27431 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:H1.85.9LinuxCVSS: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
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
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/5f4e51abfbe6eb444fa91906a5cd083044278297CVE reference, Linux
- https://git.kernel.org/stable/c/f0363af9619c77730764f10360e36c6445c12f7bCVE reference, Linux
- https://git.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95CVE reference, Linux
- https://git.kernel.org/stable/c/f562e4c4aab00986dde3093c4be919c3f2b85a4aCVE reference, Linux
- https://git.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6CVE reference, Linux
- https://git.kernel.org/stable/c/2487007aa3b9fafbd2cb14068f49791ce1d7ede5CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.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.
Use of Uninitialized Resource
Use of Uninitialized Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.