7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.3 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
5.2%
Issue Overview:
A use-after-free vulnerability in the Linux kernel’s net/sched: cls_u32 component can be exploited to achieve local privilege escalation.
If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.
We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc. (CVE-2023-3609)
An out-of-bounds write vulnerability in the Linux kernel’s net/sched: sch_qfq component can be exploited to achieve local privilege escalation.
The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks.
We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64. (CVE-2023-3611)
A use-after-free vulnerability in the Linux kernel’s net/sched: cls_fw component can be exploited to achieve local privilege escalation.
If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.
We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f. (CVE-2023-3776)
Affected Packages:
kernel
Issue Correction:
Run yum update kernel to update your system.
New Packages:
i686:
kernel-tools-debuginfo-4.14.320-169.544.amzn1.i686
kernel-4.14.320-169.544.amzn1.i686
kernel-headers-4.14.320-169.544.amzn1.i686
perf-debuginfo-4.14.320-169.544.amzn1.i686
kernel-debuginfo-4.14.320-169.544.amzn1.i686
kernel-tools-devel-4.14.320-169.544.amzn1.i686
kernel-devel-4.14.320-169.544.amzn1.i686
kernel-tools-4.14.320-169.544.amzn1.i686
perf-4.14.320-169.544.amzn1.i686
kernel-debuginfo-common-i686-4.14.320-169.544.amzn1.i686
src:
kernel-4.14.320-169.544.amzn1.src
x86_64:
kernel-4.14.320-169.544.amzn1.x86_64
kernel-headers-4.14.320-169.544.amzn1.x86_64
kernel-devel-4.14.320-169.544.amzn1.x86_64
kernel-debuginfo-4.14.320-169.544.amzn1.x86_64
perf-4.14.320-169.544.amzn1.x86_64
perf-debuginfo-4.14.320-169.544.amzn1.x86_64
kernel-tools-debuginfo-4.14.320-169.544.amzn1.x86_64
kernel-tools-devel-4.14.320-169.544.amzn1.x86_64
kernel-tools-4.14.320-169.544.amzn1.x86_64
kernel-debuginfo-common-x86_64-4.14.320-169.544.amzn1.x86_64
Red Hat: CVE-2023-3609, CVE-2023-3611, CVE-2023-3776
Mitre: CVE-2023-3609, CVE-2023-3611, CVE-2023-3776
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.3 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
5.2%