Security readout for executives and security teams
Plain-English summary
A Linux kernel netfilter flaw can make the kernel read beyond allocated memory when processing an improperly terminated LED rule identifier. A local user with sufficient access to the relevant netfilter path could potentially expose sensitive data or disrupt the system. The supplied evidence does not establish remote or active exploitation.
Executive priority
Treat this as high-priority kernel maintenance where untrusted local users can reach relevant netfilter functionality. The evidence does not support an internet-remote emergency or active exploitation claim. Expedite affected availability-sensitive systems, then complete vendor-supported fleet remediation.
Technical view
led_tg_check() failed to reject a userspace LED identifier lacking a null terminator before passing it to strlen() and kstrdup(). Syzbot observed a one-byte slab out-of-bounds read under KASAN through the nf_tables rule-creation path. The issue is classified as CWE-125 with CVSS 3.1 score 7.1.
Likely exposure
The bundle identifies Linux beginning with 2.6.30 and lists boundaries across multiple stable kernel lines. Its flattened version data does not clearly distinguish every vulnerable range or distributor backport. Inventory running kernel package builds and determine exposure using the applicable Linux stable commit or distributor advisory.
Exploitation context
The bundle marks this CVE as absent from KEV and provides no evidence of active exploitation. Discovery came from syzbot and KASAN testing. The CVSS vector describes a local, low-complexity attack requiring low privileges and no user interaction; practical reachability depends on access to the relevant netfilter rule path.
Researcher notes
The evidence establishes a missing null-termination check and resulting out-of-bounds read, but not a demonstrated exploitation chain. CVSS assigns high confidentiality and availability impact with no integrity impact. Researchers should assess rule-creation permissions, kernel configuration, allocator behavior, and distributor backports without treating the KASAN finding alone as proof of production exploitability.
Mitigation direction
- Install a vendor-supported kernel containing the applicable stable fix for your kernel branch.
- Apply the referenced Debian LTS security update where it governs the installed distribution.
- Until updated, minimize untrusted local access and privileges permitting relevant netfilter rule changes.
- Reboot into the updated kernel so the corrected code is running.
Validation and detection
- Record the running kernel version and distributor package build across Linux systems.
- Map each build to CVE-2024-56650 using its distributor advisory or applicable stable fix commit.
- Confirm the fixed kernel is running, not merely installed and awaiting reboot.
- Review kernel logs for slab-out-of-bounds reports involving led_tg_check, strlen, or kstrdup.
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-125: 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-2024-56650 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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
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:N/A:H1.85.2LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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/147a42bb02de8735cb08476be6d0917987d022c2CVE reference, Linux
- https://git.kernel.org/stable/c/ad28612ebae1fcc1104bd432e99e99d87f6bfe09CVE reference, Linux
- https://git.kernel.org/stable/c/36a9d94dac28beef6b8abba46ba8874320d3e800CVE reference, Linux
- https://git.kernel.org/stable/c/ab9916321c95f5280b72b4c5055e269f98627efeCVE reference, Linux
- https://git.kernel.org/stable/c/a9bcc0b70d9baf3ff005874489a0dc9d023b54c3CVE reference, Linux
- https://git.kernel.org/stable/c/c40c96d98e536fc1daaa125c2332b988615e30a4CVE reference, Linux
- https://git.kernel.org/stable/c/04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.htmlCVE reference, CVE
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.