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CVE-2021-43389

MEDIUM
5.5
CVSS Score
Published: November 4, 2021 at 06:39 PM UTC
Updated: June 17, 2026 at 04:10 AM UTC
6 products affected across 4 vendorsLinux KernelDebian LinuxEnterprise Linux

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.7%

Description

An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in the detach_capi_ctr function in drivers/isdn/capi/kcapi.c.

Affected

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

References (10)

Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/11/05/1
x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2013180
x_refsource_MISCMailing ListRelease NotesThird Party Advisory
Source: [email protected]
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
x_refsource_MISCMailing ListPatchThird Party Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1f3e2e97c003f80c4b087092b225c8787ff91e4d
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
x_refsource_MISC
Source: [email protected]
https://lore.kernel.org/netdev/CAFcO6XOvGQrRTaTkaJ0p3zR7y7nrAWD79r48=L_BbOyrK9X-vA%40mail.gmail.com/
x_refsource_MISCExploitMailing ListThird Party Advisory
Source: [email protected]
https://seclists.org/oss-sec/2021/q4/39

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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