CVE-2026-49419

highpriority · track · 0EPSS 0.005 · 40 %ileDERUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.47% (40th) EPSS

CVSS 7.8 · high

Is it mine?

17 products

Check your exposure

Who says so?

3 sources

fstec_bdu · cert_bund · nvd

EPSS · scored 2026-10-27

When the JAIL_AT_DESC flag is specified, kern_jail_set() and kern_jail_get() released the reference to the caller's current prison before looking up the jail descriptor. If the descriptor lookup failed, error-handling paths released the same reference a second time. An unprivileged local user can trigger a prison reference count underflow, which may cause the prison structure to be freed while still in use. When this is done on the jail host, the bug will generally result in an immediate panic. However, if the user is running in a jail, then it may be possible to exploit the bug to elevate privileges.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-415USCWE-911US

affected products (17)

Products and version ranges known to be affected.

FreeBSD Project FreeBSD OS <14.3-RELEASE-p16all versionscert_bundDE
FreeBSD Project FreeBSD OS <14.4-RELEASE-p7all versionscert_bundDE
FreeBSD Project FreeBSD OS <14.4-STABLEall versionscert_bundDE
FreeBSD Project FreeBSD OS <15.0-RELEASE-p11all versionscert_bundDE
FreeBSD Project FreeBSD OS <15.1-RELEASE-p1all versionscert_bundDE
FreeBSD Project FreeBSD OS <15.1-STABLEall versionscert_bundDE
FreeBSD Project FreeBSD OS< 14.3-RELEASE-p16cert_bundDE
FreeBSD Project FreeBSD OS< 14.4-RELEASE-p7cert_bundDE
FreeBSD Project FreeBSD OS< 14.4-STABLEcert_bundDE
FreeBSD Project FreeBSD OS< 15.0-RELEASE-p11cert_bundDE
FreeBSD Project FreeBSD OS< 15.1-RELEASE-p1cert_bundDE
FreeBSD Project FreeBSD OS< 15.1-STABLEcert_bundDE
FreeBSD Project FreeBSD15.0 → 15.0-RELEASE-p11fstec_bduRU
FreeBSD Project FreeBSD15.0 → 15.1-RELEASE-p1fstec_bduRU
FreeBSD Project FreeBSD15.0 → 15.1-STABLEfstec_bduRU
freebsd freebsd= 15.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 15.1nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2165FreeBSD Project FreeBSD OS: Mehrere SchwachstellenDeutsch2026-06-30csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in FreeBSD Project FreeBSD OS ausnutzen, um seine Privilegien zu erhöhen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Denial of Service Angriff durchzuführen, und um beliebigen Programmcode auszuführen.

also known as (1)

Other names and identifiers for this entity.

BDU:2026-11347 fstec_bdu

sources

Which sources assert this record, and when.

fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2026-08-19modified 2026-09-01

references (1) nvd

External citations — patches, advisories, analysis.

https://security.freebsd.org/advisories/FreeBSD-SA-26:38.jail.ascVendor Advisory

scry

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