CVE-2021-1905
HighExploitedPublic exploitPossible use after free due to improper handling of memory mapping of multiple processes simultaneously.
Published May 7, 2021 · Updated Oct 15, 2026 · Also known as 2826864, A-178809945, ASB-A-178809945
Key Facts
Patch immediately- CVE-2021-1905 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Apq8009 Firmware (Qualcomm), Apq8009w Firmware (Qualcomm), Apq8017 Firmware (Qualcomm) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 17, 2020. Public exploit code is available.
- EPSS estimates a 1.5% probability of exploitation in the next 30 days.
- Fixed versions are available, including :linux_kernel:Qualcomm SoCVersion:2021-05-05.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
1.5%
Higher than 74.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-1905 brief as a PDF
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Description
Possible use after free due to improper handling of memory mapping of multiple processes simultaneously. in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| Industry KEV feed | Nov 17, 2020 | May 3, 2022 | Not reported |
| CIRCL KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
398 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Apq8009 FirmwareQualcomm | See advisory | n/a |
| Apq8009w FirmwareQualcomm | See advisory | n/a |
| Apq8017 FirmwareQualcomm | See advisory | n/a |
| Apq8053 FirmwareQualcomm | See advisory | n/a |
| Apq8064au FirmwareQualcomm | See advisory | n/a |
Patched Releases
:linux_kernel:Qualcomm
SoCVersion:2021-05-05
Timeline
Added to Industry KEV feed
Nov 17, 2020
Publicly disclosed
May 7, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Oct 15, 2026
Weakness Type
- CWE-416 Use After Free
References
- advisoryhttps://source.android.com/security/bulletin/2021-05-01
- patchhttps://source.codeaurora.org/quic/la/kernel/msm-4.9/commit/?id=d236d315145f8250523ce9e14897d62e5d6639fc
- patchhttps://www.qualcomm.com/company/product-security/bulletins/may-2021-bulletin
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Possible use after free due to improper handling of memory mapping of multiple processes simultaneously.
Affected: Apq8009 Firmware (Qualcomm); Apq8009w Firmware (Qualcomm); Apq8017 Firmware (Qualcomm), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 17, 2020.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including :linux_kernel:Qualcomm SoCVersion:2021-05-05.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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