CVE & CISA-KEV Catalog

CVE-2019-19241

HIGH
7.8
CVSS v3
NVD

Description

In the Linux kernel before 5.4.2, the io_uring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/io_uring.c, and net/socket.c. For example, an attacker can bypass intended restrictions on adding an IPv4 address to the loopback interface. This occurs because IORING_OP_SENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.

How to fix

Remediation Available
linuxDebian
Fixed in:5.3.15-1CVE-2019-19241
Fixed in:5.3.15-1CVE-2019-19241
Fixed in:5.3.15-1CVE-2019-19241
Fixed in:5.3.15-1CVE-2019-19241
linux-azure-5.3Ubuntu
Fixed in:5.3.0-1013.14~18.04.1USN-4284-1
linux-gcp-5.3Ubuntu
Fixed in:5.3.0-1012.13~18.04.1USN-4284-1
linux-hweUbuntu
Fixed in:5.3.0-40.32~18.04.1USN-4284-1
linux-image-5.3.0-1012-gcpUbuntu
Fixed in:5.3.0-1012.13~18.04.1USN-4284-1
linux-image-5.3.0-1013-azureUbuntu
Fixed in:5.3.0-1013.14~18.04.1USN-4284-1
linux-image-5.3.0-1018-raspi2Ubuntu
Fixed in:5.3.0-1018.20~18.04.1USN-4284-1
linux-image-5.3.0-40-genericUbuntu
Fixed in:5.3.0-40.32~18.04.1USN-4284-1
linux-image-5.3.0-40-generic-lpaeUbuntu
Fixed in:5.3.0-40.32~18.04.1USN-4284-1
linux-image-5.3.0-40-lowlatencyUbuntu
Fixed in:5.3.0-40.32~18.04.1USN-4284-1
linux-image-azure-edgeUbuntu
Fixed in:5.3.0.1013.13USN-4284-1
linux-image-gcp-edgeUbuntu
Fixed in:5.3.0.1012.11USN-4284-1
linux-image-generic-hwe-18.04Ubuntu
Fixed in:5.3.0.40.97USN-4284-1
linux-image-generic-lpae-hwe-18.04Ubuntu
Fixed in:5.3.0.40.97USN-4284-1
linux-image-lowlatency-hwe-18.04Ubuntu
Fixed in:5.3.0.40.97USN-4284-1
linux-image-raspi2-hwe-18.04Ubuntu
Fixed in:5.3.0.1018.7USN-4284-1
linux-image-snapdragon-hwe-18.04Ubuntu
Fixed in:5.3.0.40.97USN-4284-1
linux-image-virtual-hwe-18.04Ubuntu
Fixed in:5.3.0.40.97USN-4284-1
linux-raspi2-5.3Ubuntu
Fixed in:5.3.0-1018.20~18.04.1USN-4284-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.09%probability of exploitation in 30 days
61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Vendor Advisory1
Third-Party Advisory1
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CVE-2019-19241 severity badge

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.