CVE-2026-58086
CVE-2026-58086 is a security vulnerability that is still awaiting full analysis and scoring. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-273.
Key facts
- EPSS exploit prediction: 0% (8th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-273
- Published:
- Last modified:
Description
As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user. Tracing configured by a jailed root user was therefore not flagged as privileged. An unprivileged user in a jail that has permission to debug the target process can modify the jailed root user's ktrace(2) flags, or disable tracing outright. A jailed root user therefore cannot reliably trace unprivileged processes.
Frequently asked questions
- What is CVE-2026-58086?
- As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user. Tracing configured by a jailed root user was therefore not flagged as privileged. An unprivileged user in a jail that has permission to debug the target process can modify the jailed root user's ktrace(2) flags, or disable tracing outright. A jailed root user therefore cannot reliably trace unprivileged processes.
- Is CVE-2026-58086 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-58086?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-58086 published?
- CVE-2026-58086 was published on 2026-08-19.
References
Other CWE-273 vulnerabilities
- CVE-2015-0278 — Critical (CVSS 10.0): libuv before 0.10.34 does not properly drop group privileges, which allows context-dependent attackers to gain…
- CVE-2023-34844 — Critical (CVSS 9.8): Play With Docker < 0.0.2 has an insecure CAP_SYS_ADMIN privileged mode causing the docker container to escape.
- CVE-2021-36372 — Critical (CVSS 9.8): In Apache Ozone versions prior to 1.2.0, Initially generated block tokens are persisted to the metadata database and…
- CVE-2020-24361 — Critical (CVSS 9.8): SNMPTT before 1.4.2 allows attackers to execute shell code via EXEC, PREXEC, or unknown_trap_exec.
- CVE-2011-3350 — Critical (CVSS 9.8): masqmail 0.2.21 through 0.2.30 improperly calls seteuid() in src/log.c and src/masqmail.c that results in improper…
- CVE-2011-2921 — Critical (CVSS 9.8): ktsuss versions 1.4 and prior has the uid set to root and does not drop privileges prior to executing user specified…