CVE-2026-101306
CVSS: 9.8v3.1CriticalUndergoing analysis
Published 15-10-2026Last modified 16-10-2026
Vulnerability summary
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.19%
0%100%
Low · Change unavailableKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 15-10-2026PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
Description
SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred. A process could clear the restriction by sending the descriptor to itself over a Unix domain socket. A process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.19%
Chance of exploitation in the next 30 days
Percentile
8%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
15-10-202616-10-2026
EPSS score0.19%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-273Improper Check for Dropped PrivilegesThe product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.
- CWE-281Improper Preservation of PermissionsThe product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.
Affected systems
Freebsd1 product
- freebsd≥ 15.1-RELEASE, < p4 | ≥ 15.0-RELEASE, < p14 | ≥ 14.5-RELEASE, < p1 | ≥ 14.4-RELEASE, < p10
1 vendor · 1 product
References
1 links- security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.ascVendor Advisory