4.6
MEDIUM
CVE-2023-28064
Dell BIOS Out-of-bounds Write Vulnerability
Description

Dell BIOS contains an Out-of-bounds Write vulnerability. An unauthenticated physical attacker may potentially exploit this vulnerability, leading to denial of service.

INFO

Published Date :

June 23, 2023, 11:15 a.m.

Last Modified :

June 30, 2023, 9:18 p.m.

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

0.9
Affected Products

The following products are affected by CVE-2023-28064 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Dell cpg_bios
2 Dell alienware_m15_r6_firmware
3 Dell alienware_m15_r7_firmware
4 Dell chengming_3900_firmware
5 Dell chengming_3901_firmware
6 Dell g15_5510_firmware
7 Dell g15_5511_firmware
8 Dell g15_5520_firmware
9 Dell inspiron_14_5410_firmware
10 Dell inspiron_14_5418_firmware
11 Dell inspiron_14_plus_7420_firmware
12 Dell inspiron_15_3511_firmware
13 Dell inspiron_15_5510_firmware
14 Dell inspiron_15_5518_firmware
15 Dell inspiron_16_7620_2-in-1_firmware
16 Dell inspiron_16_plus_7620_firmware
17 Dell inspiron_3511_firmware
18 Dell inspiron_3520_firmware
19 Dell inspiron_3891_firmware
20 Dell inspiron_3910_firmware
21 Dell inspiron_5310_firmware
22 Dell inspiron_5320_firmware
23 Dell inspiron_5410_firmware
24 Dell inspiron_5420_firmware
25 Dell inspiron_5620_firmware
26 Dell inspiron_7420_firmware
27 Dell inspiron_7510_firmware
28 Dell inspiron_7610_firmware
29 Dell latitude_3120_firmware
30 Dell latitude_3320_firmware
31 Dell latitude_3330_firmware
32 Dell latitude_3420_firmware
33 Dell latitude_3430_firmware
34 Dell latitude_3520_firmware
35 Dell latitude_3530_firmware
36 Dell latitude_5320_firmware
37 Dell latitude_5330_firmware
38 Dell latitude_5520_firmware
39 Dell latitude_5530_firmware
40 Dell latitude_5531_firmware
41 Dell latitude_7330_firmware
42 Dell latitude_7430_firmware
43 Dell latitude_7530_firmware
44 Dell latitude_rugged_5430_firmware
45 Dell latitude_rugged_7330_firmware
46 Dell optiplex_3000_firmware
47 Dell optiplex_5000_firmware
48 Dell optiplex_5400_firmware
49 Dell optiplex_7000_firmware
50 Dell optiplex_7000_oem_firmware
51 Dell optiplex_7400_firmware
52 Dell optiplex_7410_all-in-one_firmware
53 Dell precision_3560_firmware
54 Dell precision_3570_firmware
55 Dell precision_3571_firmware
56 Dell precision_5760_firmware
57 Dell precision_5770_firmware
58 Dell vostro_3420_firmware
59 Dell vostro_3510_firmware
60 Dell vostro_3520_firmware
61 Dell vostro_3910_firmware
62 Dell vostro_5310_firmware
63 Dell vostro_5320_firmware
64 Dell vostro_5410_firmware
65 Dell vostro_5510_firmware
66 Dell vostro_5620_firmware
67 Dell vostro_7510_firmware
68 Dell vostro_7620_firmware
69 Dell xps_13_9315_2-in-1_firmware
70 Dell xps_17_9710_firmware
71 Dell xps_17_9720_firmware
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-28064.

URL Resource
https://www.dell.com/support/kbdoc/en-us/000214778/dsa-2023-174-dell-client-bios-security-update-for-an-out-of-bounds-write-vulnerability Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-28064 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-28064 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jun. 30, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://www.dell.com/support/kbdoc/en-us/000214778/dsa-2023-174-dell-client-bios-security-update-for-an-out-of-bounds-write-vulnerability No Types Assigned https://www.dell.com/support/kbdoc/en-us/000214778/dsa-2023-174-dell-client-bios-security-update-for-an-out-of-bounds-write-vulnerability Vendor Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:dell:alienware_m15_r6_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.22.1 OR cpe:2.3:h:dell:alienware_m15_r6:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:alienware_m15_r7_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.17.0 OR cpe:2.3:h:dell:alienware_m15_r7:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:chengming_3900_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:chengming_3900:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:chengming_3901_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:chengming_3901:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:g15_5510_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.19.0 OR cpe:2.3:h:dell:g15_5510:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:g15_5511_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.22.1 OR cpe:2.3:h:dell:g15_5511:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:g15_5520_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.17.0 OR cpe:2.3:h:dell:g15_5520:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_14_5418_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.19.1 OR cpe:2.3:h:dell:inspiron_14_5418:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_14_5410_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.19.1 OR cpe:2.3:h:dell:inspiron_14_5410:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_14_plus_7420_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:inspiron_14_plus_7420:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_15_3511_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.22.1 OR cpe:2.3:h:dell:inspiron_15_3511:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_15_5510_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.19.1 OR cpe:2.3:h:dell:inspiron_15_5510:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_15_5518_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.19.1 OR cpe:2.3:h:dell:inspiron_15_5518:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_16_7620_2-in-1_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.12.1 OR cpe:2.3:h:dell:inspiron_16_7620_2-in-1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_16_plus_7620_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:inspiron_16_plus_7620:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_3511_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.22.1 OR cpe:2.3:h:dell:inspiron_3511:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_3520_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.15.0 OR cpe:2.3:h:dell:inspiron_3520:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_3891_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.18.1 OR cpe:2.3:h:dell:inspiron_3891:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_3910_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:inspiron_3910:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_5310_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.20.1 OR cpe:2.3:h:dell:inspiron_5310:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_5320_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.11.1 OR cpe:2.3:h:dell:inspiron_5320:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_5410_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.19.1 OR cpe:2.3:h:dell:inspiron_5410:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_5420_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:inspiron_5420:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_5620_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:inspiron_5620:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_7420_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.12.1 OR cpe:2.3:h:dell:inspiron_7420:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_7510_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.16.1 OR cpe:2.3:h:dell:inspiron_7510:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:inspiron_7610_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.16.1 OR cpe:2.3:h:dell:inspiron_7610:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_3120_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.17.2 OR cpe:2.3:h:dell:latitude_3120:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_3320_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.22.2 OR cpe:2.3:h:dell:latitude_3320:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_3330_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:latitude_3330:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_3420_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.29.0 OR cpe:2.3:h:dell:latitude_3420:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_3430_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.1 OR cpe:2.3:h:dell:latitude_3430:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_3520_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.29.0 OR cpe:2.3:h:dell:latitude_3520:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_3530_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.1 OR cpe:2.3:h:dell:latitude_3530:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_5320_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.28.1 OR cpe:2.3:h:dell:latitude_5320:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_5330_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.1 OR cpe:2.3:h:dell:latitude_5330:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_5520_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.28.1 OR cpe:2.3:h:dell:latitude_5520:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_5530_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.2 OR cpe:2.3:h:dell:latitude_5530:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_5531_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:latitude_5531:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_7330_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:latitude_7330:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_7430_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:latitude_7430:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_7530_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:latitude_7530:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_rugged_5430_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.18.1 OR cpe:2.3:h:dell:latitude_rugged_5430:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:latitude_rugged_7330_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.18.1 OR cpe:2.3:h:dell:latitude_rugged_7330:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:optiplex_3000_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.1 OR cpe:2.3:h:dell:optiplex_3000:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:optiplex_5000_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.1 OR cpe:2.3:h:dell:optiplex_5000:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:optiplex_5400_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.1.28 OR cpe:2.3:h:dell:optiplex_5400:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:optiplex_7000_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.1 OR cpe:2.3:h:dell:optiplex_7000:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:optiplex_7000_oem_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.1 OR cpe:2.3:h:dell:optiplex_7000_oem:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:optiplex_7400_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.1.28 OR cpe:2.3:h:dell:optiplex_7400:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:optiplex_7410_all-in-one_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.4.1 OR cpe:2.3:h:dell:optiplex_7410_all-in-one:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:precision_3560_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.28.1 OR cpe:2.3:h:dell:precision_3560:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:precision_3570_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.2 OR cpe:2.3:h:dell:precision_3570:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:precision_3571_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:precision_3571:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:precision_5760_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.20.1 OR cpe:2.3:h:dell:precision_5760:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:precision_5770_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.17.1 OR cpe:2.3:h:dell:precision_5770:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_3420_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.15.0 OR cpe:2.3:h:dell:vostro_3420:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_3510_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.22.1 OR cpe:2.3:h:dell:vostro_3510:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_3520_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.15.0 OR cpe:2.3:h:dell:vostro_3520:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_3910_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:vostro_3910:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_5310_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.20.1 OR cpe:2.3:h:dell:vostro_5310:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_5320_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.11.1 OR cpe:2.3:h:dell:vostro_5320:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_5410_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.19.1 OR cpe:2.3:h:dell:vostro_5410:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_5510_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.19.1 OR cpe:2.3:h:dell:vostro_5510:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_5620_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.14.1 OR cpe:2.3:h:dell:vostro_5620:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_7510_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.16.1 OR cpe:2.3:h:dell:vostro_7510:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:vostro_7620_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.13.0 OR cpe:2.3:h:dell:vostro_7620:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:xps_13_9315_2-in-1_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.8.1 OR cpe:2.3:h:dell:xps_13_9315_2-in-1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:xps_17_9710_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.20.1 OR cpe:2.3:h:dell:xps_17_9710:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:dell:xps_17_9720_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.17.1 OR cpe:2.3:h:dell:xps_17_9720:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-28064 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-28064 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.05 }} 0.00%

score

0.15205

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability