Security readout for executives and security teams
Plain-English summary
This Linux kernel issue can let a privileged local user crash the system by enabling a kprobe on a sensitive RCU function under specific nohz_full conditions. The impact shown is a kernel stack overflow and panic, meaning availability loss rather than data theft. Public evidence does not show active exploitation.
Executive priority
Treat this as a targeted availability risk for Linux infrastructure, not a broad remote compromise. Prioritize kernel patching where tracing access is delegated, containers are privileged, or high-availability workloads run on affected kernels.
Technical view
The flaw occurs when __rcu_irq_enter_check_tick() is kprobe-ed, causing recursive debug/interrupt handling and kernel stack overflow. The upstream fix blacklists that symbol with NOKPROBE_SYMBOL(). Reproduction evidence requires CONFIG_NO_HZ_FULL, a nohz_full boot configuration, and access to kernel tracing kprobe controls.
Likely exposure
Exposure is most likely on Linux systems using affected kernels where privileged users, automation, or containers can write to kernel tracing/kprobe interfaces. Systems without kprobes, without nohz_full use, or with tightly restricted tracing access have lower practical exposure.
Exploitation context
The source describes a local reproduction that ends in kernel panic. It does not provide evidence of remote exploitation, privilege escalation, data compromise, or active exploitation. CISA KEV status in the bundle is false.
Researcher notes
The strongest evidence is the upstream kernel description and stable commit references. The bundle lacks CVSS, CWE, distro package status, and proof of exploitation. Avoid assuming affected distro versions without vendor advisories or backport checks.
Mitigation direction
- Update to a vendor kernel containing the upstream NOKPROBE_SYMBOL fix.
- Check Linux distribution advisories for the fixed kernel package covering your branch.
- Restrict access to /sys/kernel/tracing and debugfs interfaces to trusted administrators only.
- Avoid exposing kernel tracing controls inside containers or delegated admin environments.
- Review use of CONFIG_NO_HZ_FULL and nohz_full on sensitive production hosts.
Validation and detection
- Inventory Linux kernel versions and compare them with vendor fixed-package guidance.
- Check whether CONFIG_NO_HZ_FULL is enabled on relevant hosts.
- Verify boot parameters for nohz_full usage on production systems.
- Audit permissions and mounts for /sys/kernel/tracing and debugfs.
- Confirm the upstream fix or equivalent vendor backport is present.
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.
CVE-2023-53655 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/eb18bc5a8678f431c500e6da1b8b5f34478d5bc1CVE reference, Linux
- https://git.kernel.org/stable/c/4c3d1a6720aefb02403ddfebe85db521d3af2c3bCVE reference, Linux
- https://git.kernel.org/stable/c/c8a3341b339285495cf7c8d061d659465f2311e0CVE reference, Linux
- https://git.kernel.org/stable/c/93b6295f677d96b73cfcb703532f6c7369a60d96CVE reference, Linux
- https://git.kernel.org/stable/c/7b5a97333e920b69356e097f185bdc51d61e66eeCVE reference, Linux
- https://git.kernel.org/stable/c/7a29fb4a4771124bc61de397dbfc1554dbbcc19cCVE 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.