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CVE-2021-29627

HIGH
7.8
CVSS Score
Published: April 7, 2021 at 02:45 PM UTC
Updated: June 17, 2026 at 03:48 AM UTC
1 product affected across 1 vendorFreeBSD

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Severity
HIGH7.8
Exploit prediction
EPSS 0.7%

Description

In FreeBSD 13.0-STABLE before n245050, 12.2-STABLE before r369525, 13.0-RC4 before p0, and 12.2-RELEASE before p6, listening socket accept filters implementing the accf_create callback incorrectly freed a process supplied argument string. Additional operations on the socket can lead to a double free or use after free.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FreeBSD· Freebsd
95%
12.0 ≤ v < 12.212.212.2 p112.2 p213.0 beta113.0 beta213.0 beta313.0 beta413.0 rc113.0 rc213.0 rc3FreeBSD 12.2-RELEASE before p6
Affected range stops below 12.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210423-0007/

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-415CWE-416

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