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cve[email protected]CVE-2023-4623
HistorySep 06, 2023 - 2:15 p.m.

CVE-2023-4623

2023-09-0614:15:12
CWE-416
CWE-416
[email protected]
web.nvd.nist.gov
459
cve-2023-4623
linux kernel
net/sched
sch_hfsc
use-after-free vulnerability
local privilege escalation
nvd
security advisory

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

7.3 High

AI Score

Confidence

High

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%

JSON

A use-after-free vulnerability in the Linux kernel’s net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation.

If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free.

We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Related

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amazon 3
ubuntu 17
osv 16
photon 3
cloudlinux 2
ibm 1
nessus
nessus
SUSE SLES12 Security Update : kernel (Live Patch 44 for SLE 12 SP5) (SUSE-SU-2023:4208-1)
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openSUSE: Security Advisory for the Linux Kernel RT (Live Patch 11 for SLE 15 SP4) (SUSE-SU-2023:4165-1)
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openSUSE: Security Advisory for the Linux Kernel RT (Live Patch 5 for SLE 15 SP4) (SUSE-SU-2023:4166-1)
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(RHSA-2024:1747) Important: kernel security update
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CVE-2023-4623 Use-after-free in Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component
2023-09-06 13:56:57
virtuozzo
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Important: kernel
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2023-10-30 00:00:00
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2023-10-04 00:00:00
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2023-10-23 00:00:00
osv
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linux-iot, linux-raspi, linux-raspi-5.4 vulnerabilities
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photon
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Important Photon OS Security Update - PHSA-2023-4.0-0488
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Important Photon OS Security Update - PHSA-2023-5.0-0101
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cloudlinux
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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

7.3 High

AI Score

Confidence

High

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%

JSON
Related for CVE-2023-4623
nessus93redhatcve1debiancve1openvas30oraclelinux6prion1redhat20cnvd1ubuntucve1cbl_mariner1cvelist1virtuozzo1amazon3ubuntu17osv16photon3cloudlinux2ibm1